New version

front/.gitignore → JavaDemo/AndroidDemo/.gitignore

@@ -12,3 +12,4 @@
 /captures
 .externalNativeBuild
 .cxx
+local.properties

JavaDemo/AndroidDemo/.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml

front/.idea/compiler.xml → JavaDemo/AndroidDemo/.idea/compiler.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="8" />
+    <bytecodeTargetLevel target="1.8" />
   </component>
 </project>
\ No newline at end of file

JavaDemo/AndroidDemo/.idea/gradle.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="PLATFORM" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="1.8" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+        <option name="useQualifiedModuleNames" value="true" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>
\ No newline at end of file

JavaDemo/AndroidDemo/.idea/jarRepositories.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="BintrayJCenter" />
+      <option name="name" value="BintrayJCenter" />
+      <option name="url" value="https://jcenter.bintray.com/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="Google" />
+      <option name="name" value="Google" />
+      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
+    </remote-repository>
+  </component>
+</project>
\ No newline at end of file

front/.idea/misc.xml → JavaDemo/AndroidDemo/.idea/misc.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectInspectionProfilesVisibleTreeState">
-    <entry key="Project Default">
-      <profile-state>
-        <expanded-state>
-          <State />
-        </expanded-state>
-        <selected-state>
-          <State>
-            <id>Android</id>
-          </State>
-        </selected-state>
-      </profile-state>
-    </entry>
-  </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

JavaDemo/AndroidDemo/.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

JavaDemo/AndroidDemo/app/.gitignore

+/build
\ No newline at end of file

front/app/build.gradle → JavaDemo/AndroidDemo/app/build.gradle

-apply plugin: 'com.android.application'
+plugins {
+    id 'com.android.application'
+}
 
 android {
-    compileSdkVersion 29
-    buildToolsVersion "29.0.2"
+    compileSdkVersion 30
+    buildToolsVersion "30.0.2"
+
+    buildFeatures{
+        viewBinding = true
+    }
+
     defaultConfig {
-        applicationId "com.example.myapplication"
-        minSdkVersion 23
-        targetSdkVersion 29
+        applicationId "com.example.androiddemo"
+        minSdkVersion 29
+        targetSdkVersion 30
         versionCode 1
         versionName "1.0"
+
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
+
     buildTypes {
         release {
             minifyEnabled false
@@ -18,18 +27,22 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility = 1.8
-        targetCompatibility = 1.8
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
 dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    implementation 'com.squareup.okhttp3:okhttp:4.2.2'
-    implementation 'com.alibaba:fastjson:1.2.62'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
-}
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'com.squareup.okhttp3:okhttp:4.9.0'
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.12.1'
+    implementation 'org.bouncycastle:bcprov-jdk15to18:1.68'
+    implementation "org.projectlombok:lombok:1.18.16"
+    annotationProcessor 'org.projectlombok:lombok:1.18.16'
+
+    testImplementation 'junit:junit:4.13.1'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}
\ No newline at end of file

front/app/proguard-rules.pro → JavaDemo/AndroidDemo/app/proguard-rules.pro

@@ -18,4 +18,4 @@
 
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
-#-renamesourcefileattribute SourceFile
+#-renamesourcefileattribute SourceFile
\ No newline at end of file

front/app/src/androidTest/java/com/example/myapplication/ExampleInstrumentedTest.java → JavaDemo/AndroidDemo/app/src/androidTest/java/com/example/androiddemo/ExampleInstrumentedTest.java

-package com.example.myapplication;
+package com.example.androiddemo;
 
 import android.content.Context;
 
@@ -21,7 +21,6 @@ public class ExampleInstrumentedTest {
     public void useAppContext() {
         // Context of the app under test.
         Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
-
-        assertEquals("com.example.myapplication", appContext.getPackageName());
+        assertEquals("com.example.androiddemo", appContext.getPackageName());
     }
-}
+}
\ No newline at end of file

front/app/src/main/AndroidManifest.xml → JavaDemo/AndroidDemo/app/src/main/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.myapplication">
+    package="com.example.androiddemo">
 
     <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
     <application
-        android:networkSecurityConfig="@xml/network_security_config"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/AppTheme">
+        android:usesCleartextTraffic="true"
+        android:theme="@style/Theme.AndroidDemo">
         <activity android:name=".MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

JavaDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/MainActivity.java

+package com.example.androiddemo;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.Message;
+import android.util.Log;
+import android.view.View;
+
+import com.example.androiddemo.databinding.ActivityMainBinding;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.io.IOException;
+
+import okhttp3.Call;
+import okhttp3.Callback;
+import okhttp3.MediaType;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
+import okhttp3.ResponseBody;
+
+public class MainActivity extends AppCompatActivity {
+
+    private ActivityMainBinding binding;
+    private final OkHttpClient client = new OkHttpClient();
+    private final ObjectMapper mapper = new ObjectMapper();
+    private int signInId = 0;
+    private final Handler handler = new Handler(Looper.getMainLooper());
+    private static final MediaType mediaType = MediaType.parse("application/json;charset=utf-8");
+    private final Message message = new Message();
+    private String oldName;
+    private String oldPassword;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        binding = ActivityMainBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+    }
+
+    public void signInUp(View view) {
+        try {
+            String name = binding.name.getText().toString();
+            String password = Utils.encrypt(binding.password.getText().toString());
+            Request request = new Request.Builder().url(NetworkSettings.SIGN_IN_UP).post(
+                    RequestBody.create(mapper.writeValueAsString(new User(name, password)), mediaType)
+            ).build();
+            client.newCall(request).enqueue(new Callback() {
+                @Override
+                public void onFailure(@NotNull Call call, @NotNull IOException e) {
+                    message.what = ResponseCode.REQUEST_FAILED;
+                    handler.post(()->Utils.showMessage(getApplicationContext(),message));
+                    e.printStackTrace();
+                }
+
+                @Override
+                public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
+                    if (response.isSuccessful()) {
+                        ResponseBody body = response.body();
+                        if (body != null) {
+                            RestResponse restResponse = mapper.readValue(body.string(), RestResponse.class);
+                            message.what = restResponse.getCode();
+                            if(message.what == ResponseCode.SIGN_IN_SUCCESS){
+                                handler.post(()->{
+                                    signInId = (int)restResponse.getData();
+                                    binding.update.setVisibility(View.VISIBLE);
+                                    binding.delete.setVisibility(View.VISIBLE);
+                                    binding.signInUp.setText("退出");
+                                    binding.signInUp.setOnClickListener(v->signOut(false));
+                                    oldName = binding.name.getText().toString();
+                                    oldPassword = binding.password.getText().toString();
+                                });
+                            }
+                        } else {
+                            message.what = ResponseCode.EMPTY_RESPONSE;
+                            Log.e("RESPONSE_BODY_EMPTY", response.message());
+                        }
+                    } else {
+                        message.what = ResponseCode.SERVER_ERROR;
+                        Log.e("SERVER_ERROR", response.message());
+                    }
+                    handler.post(()->Utils.showMessage(getApplicationContext(),message));
+                }
+            });
+        } catch (JsonProcessingException e) {
+            message.what = ResponseCode.JSON_SERIALIZATION;
+            Utils.showMessage(getApplicationContext(),message);
+            e.printStackTrace();
+        }
+    }
+
+    public void update(View view) {
+        try {
+            String name = binding.name.getText().toString();
+            String password = binding.password.getText().toString();
+            if(name.equals(oldName) && password.equals(oldPassword)){
+                message.what = ResponseCode.UNCHANGED_INFORMATION;
+                handler.post(()->Utils.showMessage(getApplicationContext(),message));
+                return;
+            }
+            password = Utils.encrypt(password);
+            Request request = new Request.Builder().url(NetworkSettings.UPDATE).put(
+                RequestBody.create(
+                    mapper.writeValueAsString(new User(signInId, name, password)),
+                    mediaType
+                )
+            ).build();
+            client.newCall(request).enqueue(new Callback() {
+                @Override
+                public void onFailure(@NotNull Call call, @NotNull IOException e) {
+                    message.what = ResponseCode.REQUEST_FAILED;
+                    handler.post(()->Utils.showMessage(getApplicationContext(),message));
+                    e.printStackTrace();
+                }
+
+                @Override
+                public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
+                    if (response.isSuccessful()) {
+                        ResponseBody body = response.body();
+                        if (body != null) {
+                            RestResponse restResponse = mapper.readValue(body.string(), RestResponse.class);
+                            message.what = restResponse.getCode();
+                            if(message.what == ResponseCode.UPDATE_SUCCESS){
+                                oldName = binding.name.getText().toString();
+                                oldPassword = binding.password.getText().toString();
+                            }
+                        } else {
+                            message.what = ResponseCode.EMPTY_RESPONSE;
+                            Log.e("RESPONSE_BODY_EMPTY", response.message());
+                        }
+                    } else {
+                        message.what = ResponseCode.SERVER_ERROR;
+                        Log.e("SERVER_ERROR", response.message());
+                    }
+                    handler.post(()->Utils.showMessage(getApplicationContext(),message));
+                }
+            });
+        } catch (Exception e) {
+            message.what = ResponseCode.JSON_SERIALIZATION;
+            Utils.showMessage(getApplicationContext(),message);
+            e.printStackTrace();
+        }
+    }
+
+    public void delete(View view) {
+        try {
+            Request request = new Request.Builder().url(NetworkSettings.DELETE+"?id="+signInId).delete().build();
+            client.newCall(request).enqueue(new Callback() {
+                @Override
+                public void onFailure(@NotNull Call call, @NotNull IOException e) {
+                    message.what = ResponseCode.REQUEST_FAILED;
+                    handler.post(()->Utils.showMessage(getApplicationContext(),message));
+                    e.printStackTrace();
+                }
+
+                @Override
+                public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
+                    if (response.isSuccessful()) {
+                        ResponseBody body = response.body();
+                        if (body != null) {
+                            RestResponse restResponse = mapper.readValue(body.string(), RestResponse.class);
+                            message.what = restResponse.getCode();
+                            if(message.what == ResponseCode.DELETE_SUCCESS){
+                                handler.post(()->signOut(true));
+                            }
+                        } else {
+                            message.what = ResponseCode.EMPTY_RESPONSE;
+                            Log.e("RESPONSE_BODY_EMPTY", response.message());
+                        }
+                    } else {
+                        message.what = ResponseCode.SERVER_ERROR;
+                        Log.e("SERVER_ERROR", response.message());
+                    }
+                    handler.post(()->Utils.showMessage(getApplicationContext(),message));
+                }
+            });
+        } catch (Exception e) {
+            message.what = ResponseCode.JSON_SERIALIZATION;
+            Utils.showMessage(getApplicationContext(), message);
+            e.printStackTrace();
+        }
+    }
+
+    public void signOut(boolean isDeleted){
+        signInId = 0;
+        binding.signInUp.setText("注册/登录");
+        binding.signInUp.setOnClickListener(this::signInUp);
+        binding.name.setText("");
+        binding.password.setText("");
+        binding.update.setVisibility(View.INVISIBLE);
+        binding.delete.setVisibility(View.INVISIBLE);
+        if(!isDeleted){
+            message.what = ResponseCode.EXIT_SUCCESS;
+        }
+        Utils.showMessage(getApplicationContext(),message);
+    }
+}
\ No newline at end of file

JavaDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/NetworkSettings.java

+package com.example.androiddemo;
+
+public class NetworkSettings {
+    private static final String HOST = "192.168.1.8";
+    private static final String PORT = "8080";
+    public static final String SIGN_IN_UP = "http://"+ HOST +":"+PORT + "/sign/in/up";
+    public static final String UPDATE = "http://"+ HOST +":"+PORT + "/update";
+    public static final String DELETE = "http://"+ HOST +":"+PORT + "/delete";
+}
\ No newline at end of file

JavaDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/ResponseCode.java

+package com.example.androiddemo;
+
+public class ResponseCode {
+    public static final int SIGN_IN_SUCCESS = 2000;
+    public static final int SIGN_UP_SUCCESS = 2001;
+    public static final int UPDATE_SUCCESS = 2002;
+    public static final int DELETE_SUCCESS = 2003;
+
+    public static final int SIGN_IN_FAILED = 3000;
+    public static final int SIGN_UP_FAILED = 3001;
+    public static final int UPDATE_FAILED = 3002;
+    public static final int DELETE_FAILED = 3003;
+
+    public static final int EMPTY_RESPONSE = 4000;
+    public static final int SERVER_ERROR = 4001;
+    public static final int REQUEST_FAILED = 4002;
+    public static final int JSON_SERIALIZATION = 4003;
+    public static final int EXIT_SUCCESS = 4004;
+    public static final int UNCHANGED_INFORMATION = 4005;
+}

JavaDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/RestResponse.java

+package com.example.androiddemo;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@NoArgsConstructor
+@Setter
+@Getter
+public class RestResponse {
+    private int code;
+    private Object data;
+}

JavaDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/User.java

+package com.example.androiddemo;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@AllArgsConstructor
+@NoArgsConstructor
+@Getter
+@Setter
+public class User {
+    private int id;
+    private String name;
+    private String password;
+
+    public User(String name, String password) {
+        this.name = name;
+        this.password = password;
+    }
+}

JavaDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/Utils.java

+package com.example.androiddemo;
+
+import android.content.Context;
+import android.os.Message;
+import android.widget.Toast;
+
+import org.bouncycastle.jcajce.provider.digest.Keccak;
+import org.bouncycastle.util.encoders.Hex;
+
+import java.nio.charset.StandardCharsets;
+
+public class Utils {
+    private static final Keccak.Digest512 digest512 = new Keccak.Digest512();
+
+    public static String encrypt(String origin) {
+        return new String(Hex.encode(digest512.digest(origin.getBytes(StandardCharsets.UTF_8))));
+    }
+
+    public static String getResponseMessage(int code) {
+        String message = "";
+        switch (code) {
+            case ResponseCode.SIGN_IN_SUCCESS:
+                message = "登录成功";
+                break;
+            case ResponseCode.SIGN_UP_SUCCESS:
+                message = "注册成功";
+                break;
+            case ResponseCode.SIGN_IN_FAILED:
+                message = "用户名或密码错误";
+                break;
+            case ResponseCode.SIGN_UP_FAILED:
+                message = "注册失败";
+                break;
+            case ResponseCode.DELETE_FAILED:
+                message = "删除失败";
+                break;
+            case ResponseCode.DELETE_SUCCESS:
+                message = "删除成功,自动退出";
+                break;
+            case ResponseCode.UPDATE_SUCCESS:
+                message = "更新成功";
+                break;
+            case ResponseCode.UPDATE_FAILED:
+                message = "更新失败";
+                break;
+            case ResponseCode.EMPTY_RESPONSE:
+                message = "响应体为空";
+                break;
+            case ResponseCode.SERVER_ERROR:
+                message = "服务器错误";
+                break;
+            case ResponseCode.JSON_SERIALIZATION:
+                message = "JSON序列化错误";
+                break;
+            case ResponseCode.EXIT_SUCCESS:
+                message = "退出成功";
+                break;
+            case ResponseCode.REQUEST_FAILED:
+                message = "请求发送失败";
+                break;
+            case ResponseCode.UNCHANGED_INFORMATION:
+                message = "未修改信息";
+                break;
+        }
+        return message;
+    }
+
+    public static void showMessage(Context context, Message message) {
+        Toast.makeText(context, getResponseMessage(message.what), Toast.LENGTH_SHORT).show();
+    }
+}
\ No newline at end of file

front/app/src/main/res/drawable-v24/ic_launcher_foreground.xml → JavaDemo/AndroidDemo/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -4,17 +4,13 @@
     android:height="108dp"
     android:viewportWidth="108"
     android:viewportHeight="108">
-    <path
-        android:fillType="evenOdd"
-        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
-        android:strokeWidth="1"
-        android:strokeColor="#00000000">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
         <aapt:attr name="android:fillColor">
             <gradient
-                android:endX="78.5885"
-                android:endY="90.9159"
-                android:startX="48.7653"
-                android:startY="61.0927"
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
                 android:type="linear">
                 <item
                     android:color="#44000000"
@@ -28,7 +24,7 @@
     <path
         android:fillColor="#FFFFFF"
         android:fillType="nonZero"
-        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
         android:strokeWidth="1"
         android:strokeColor="#00000000" />
-</vector>
+</vector>
\ No newline at end of file

front/app/src/main/res/drawable/ic_launcher_background.xml → JavaDemo/AndroidDemo/app/src/main/res/drawable/ic_launcher_background.xml

@@ -5,7 +5,7 @@
     android:viewportWidth="108"
     android:viewportHeight="108">
     <path
-        android:fillColor="#008577"
+        android:fillColor="#3DDC84"
         android:pathData="M0,0h108v108h-108z" />
     <path
         android:fillColor="#00000000"

front/app/src/main/res/layout/activity_main.xml → JavaDemo/AndroidDemo/app/src/main/res/layout/activity_main.xml

@@ -7,73 +7,66 @@
     tools:context=".MainActivity">
 
     <Button
-        android:id="@+id/delete"
+        android:id="@+id/signInUp"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="280dp"
-        android:layout_marginTop="404dp"
-        android:text="删除"
+        android:layout_marginStart="152dp"
+        android:layout_marginTop="40dp"
+        android:onClick="signInUp"
+        android:text="@string/signInUp"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toBottomOf="@+id/password" />
 
     <Button
-        android:id="@+id/register"
+        android:id="@+id/update"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="32dp"
-        android:layout_marginTop="293dp"
-        android:text="注册"
+        android:layout_marginStart="40dp"
+        android:layout_marginTop="40dp"
+        android:text="@string/update"
+        android:visibility="invisible"
+        android:onClick="update"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toBottomOf="@+id/signInUp" />
 
     <Button
-        android:id="@+id/modify"
+        android:id="@+id/delete"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="32dp"
-        android:layout_marginTop="404dp"
-        android:text="修改"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        android:visibility="invisible"
+        android:layout_marginTop="40dp"
+        android:layout_marginEnd="40dp"
+        android:text="@string/delete"
+        android:onClick="delete"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/signInUp" />
 
     <EditText
         android:id="@+id/name"
-        android:layout_width="336dp"
-        android:layout_height="50dp"
-        android:layout_marginStart="32dp"
-        android:layout_marginTop="192dp"
-        android:layout_marginEnd="43dp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="100dp"
+        android:layout_marginTop="48dp"
         android:ems="10"
-        android:hint="请输入姓名"
         android:inputType="textPersonName"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
+        android:hint="@string/nameHint"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        tools:ignore="LabelFor"
+        android:autofillHints="" />
 
     <EditText
-        android:id="@+id/id"
-        android:layout_width="336dp"
-        android:layout_height="50dp"
-        android:layout_marginStart="32dp"
-        android:layout_marginTop="112dp"
-        android:layout_marginEnd="43dp"
-        android:ems="10"
-        android:hint="请输入id"
-        android:inputType="textPersonName"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <Button
-        android:id="@+id/login"
+        android:id="@+id/password"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="293dp"
-        android:layout_marginEnd="43dp"
-        android:text="登录"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        android:layout_marginStart="100dp"
+        android:layout_marginTop="28dp"
+        android:autofillHints=""
+        android:hint="@string/passwordHint"
+        android:ems="10"
+        android:inputType="textPassword"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/name"
+        tools:ignore="LabelFor" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

JavaDemo/AndroidDemo/app/src/main/res/values-night/themes.xml

+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.AndroidDemo" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>
\ No newline at end of file

JavaDemo/AndroidDemo/app/src/main/res/values/colors.xml

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
\ No newline at end of file

JavaDemo/AndroidDemo/app/src/main/res/values/strings.xml

+<resources>
+    <string name="app_name">AndroidDemo</string>
+    <string name="signInUp">注册/登录</string>
+    <string name="update">修改</string>
+    <string name="delete">删除</string>
+    <string name="name">Name</string>
+    <string name="nameHint">请输入用户名</string>
+    <string name="passwordHint">请输入密码</string>
+</resources>
\ No newline at end of file

JavaDemo/AndroidDemo/app/src/main/res/values/themes.xml

+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.AndroidDemo" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>
\ No newline at end of file

front/app/src/test/java/com/example/myapplication/ExampleUnitTest.java → JavaDemo/AndroidDemo/app/src/test/java/com/example/androiddemo/ExampleUnitTest.java

-package com.example.myapplication;
+package com.example.androiddemo;
 
 import org.junit.Test;
 

front/build.gradle → JavaDemo/AndroidDemo/build.gradle

 // Top-level build file where you can add configuration options common to all sub-projects/modules.
-
 buildscript {
     repositories {
         google()
         jcenter()
-        
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.2'
-        
+        classpath "com.android.tools.build:gradle:4.1.2"
+
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
@@ -18,10 +16,9 @@ allprojects {
     repositories {
         google()
         jcenter()
-        
     }
 }
 
 task clean(type: Delete) {
     delete rootProject.buildDir
-}
+}
\ No newline at end of file

front/gradle.properties → JavaDemo/AndroidDemo/gradle.properties

@@ -6,15 +6,14 @@
 # http://www.gradle.org/docs/current/userguide/build_environment.html
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
-org.gradle.jvmargs=-Xmx1536m
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 # AndroidX package structure to make it clearer which packages are bundled with the
-# Android operating system, and which are packaged with your app's APK
+# Android operating system, and which are packaged with your app"s APK
 # https://developer.android.com/topic/libraries/support-library/androidx-rn
 android.useAndroidX=true
 # Automatically convert third-party libraries to use AndroidX
-android.enableJetifier=true
-
+android.enableJetifier=true
\ No newline at end of file

front/gradle/wrapper/gradle-wrapper.properties → JavaDemo/AndroidDemo/gradle/wrapper/gradle-wrapper.properties

-#Wed Nov 27 01:12:05 CST 2019
+#Sat Jan 23 17:02:53 CST 2021
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.1-all.zip

JavaDemo/AndroidDemo/gradlew

+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

JavaDemo/AndroidDemo/gradlew.bat

+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

front/settings.gradle → JavaDemo/AndroidDemo/settings.gradle

 include ':app'
-rootProject.name='jesus'
+rootProject.name = "AndroidDemo"
\ No newline at end of file

back/.gitignore → JavaDemo/SpringBootDemo/.gitignore

 HELP.md
 target/
 !.mvn/wrapper/maven-wrapper.jar
-!**/src/main/**
-!**/src/test/**
+!**/src/main/**/target/
+!**/src/test/**/target/
 
 ### STS ###
 .apt_generated
@@ -26,6 +26,8 @@ target/
 /nbdist/
 /.nb-gradle/
 build/
+!**/src/main/**/build/
+!**/src/test/**/build/
 
 ### VS Code ###
 .vscode/

back/.mvn/wrapper/MavenWrapperDownloader.java → JavaDemo/SpringBootDemo/.mvn/wrapper/MavenWrapperDownloader.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2007-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@ import java.util.Properties;
 
 public class MavenWrapperDownloader {
 
-    private static final String WRAPPER_VERSION = "0.5.5";
+    private static final String WRAPPER_VERSION = "0.5.6";
     /**
      * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
      */

back/.mvn/wrapper/maven-wrapper.properties → JavaDemo/SpringBootDemo/.mvn/wrapper/maven-wrapper.properties

-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.2/apache-maven-3.6.2-bin.zip
-wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.5/maven-wrapper-0.5.5.jar
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

back/mvnw → JavaDemo/SpringBootDemo/mvnw

@@ -19,7 +19,7 @@
 # ----------------------------------------------------------------------------
 
 # ----------------------------------------------------------------------------
-# Maven2 Start Up Batch script
+# Maven Start Up Batch script
 #
 # Required ENV vars:
 # ------------------
@@ -212,9 +212,9 @@ else
       echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
     fi
     if [ -n "$MVNW_REPOURL" ]; then
-      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.5/maven-wrapper-0.5.5.jar"
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
     else
-      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.5/maven-wrapper-0.5.5.jar"
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
     fi
     while IFS="=" read key value; do
       case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
@@ -246,7 +246,7 @@ else
         else
             curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
         fi
-        
+
     else
         if [ "$MVNW_VERBOSE" = true ]; then
           echo "Falling back to using Java to download"

back/mvnw.cmd → JavaDemo/SpringBootDemo/mvnw.cmd

@@ -18,7 +18,7 @@
 @REM ----------------------------------------------------------------------------
 
 @REM ----------------------------------------------------------------------------
-@REM Maven2 Start Up Batch script
+@REM Maven Start Up Batch script
 @REM
 @REM Required ENV vars:
 @REM JAVA_HOME - location of a JDK home dir
@@ -26,7 +26,7 @@
 @REM Optional ENV vars
 @REM M2_HOME - location of maven2's installed home dir
 @REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
-@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a key stroke before ending
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
 @REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
 @REM     e.g. to debug Maven itself, use
 @REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
@@ -120,7 +120,7 @@ SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
 set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
 set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
 
-set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.5/maven-wrapper-0.5.5.jar"
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
 
 FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
     IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
@@ -134,7 +134,7 @@ if exist %WRAPPER_JAR% (
     )
 ) else (
     if not "%MVNW_REPOURL%" == "" (
-        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.5/maven-wrapper-0.5.5.jar"
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
     )
     if "%MVNW_VERBOSE%" == "true" (
         echo Couldn't find %WRAPPER_JAR%, downloading it ...

back/pom.xml → JavaDemo/SpringBootDemo/pom.xml

@@ -5,20 +5,17 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.2.1.RELEASE</version>
+        <version>2.4.2</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
-    <groupId>com</groupId>
-    <artifactId>test</artifactId>
+    <groupId>com.example</groupId>
+    <artifactId>demo</artifactId>
     <version>0.0.1-SNAPSHOT</version>
-    <packaging>war</packaging>
-    <name>test</name>
+    <name>demo</name>
     <description>Demo project for Spring Boot</description>
-
     <properties>
-        <java.version>1.8</java.version>
+        <java.version>11</java.version>
     </properties>
-
     <dependencies>
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -29,6 +26,12 @@
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-devtools</artifactId>
+            <scope>runtime</scope>
+            <optional>true</optional>
+        </dependency>
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
@@ -36,19 +39,18 @@
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-tomcat</artifactId>
-            <scope>provided</scope>
+            <artifactId>spring-boot-configuration-processor</artifactId>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.junit.vintage</groupId>
-                    <artifactId>junit-vintage-engine</artifactId>
-                </exclusion>
-            </exclusions>
         </dependency>
     </dependencies>
 
@@ -57,6 +59,14 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <exclude>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </exclude>
+                    </excludes>
+                </configuration>
             </plugin>
         </plugins>
     </build>

back/src/main/java/com/test/TestApplication.java → JavaDemo/SpringBootDemo/src/main/java/com/example/demo/DemoApplication.java

-package com.test;
+package com.example.demo;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
-public class TestApplication {
+public class DemoApplication {
 
     public static void main(String[] args) {
-        SpringApplication.run(TestApplication.class, args);
+        SpringApplication.run(DemoApplication.class, args);
     }
 
 }

JavaDemo/SpringBootDemo/src/main/java/com/example/demo/controller/UserController.java

+package com.example.demo.controller;
+
+import com.example.demo.entity.User;
+import com.example.demo.response.ResponseBody;
+import com.example.demo.response.ResponseCode;
+import com.example.demo.service.UserService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/")
+@RequiredArgsConstructor(onConstructor = @__(@Autowired))
+public class UserController {
+    private final UserService service; 
+    
+    @PostMapping("sign/in/up")
+    public ResponseBody signInUp(@RequestBody User user){
+        if(service.exists(user)){
+            User u = service.findByNameAndPassword(user);
+            return new ResponseBody(u != null ? ResponseCode.SIGN_IN_SUCCESS : ResponseCode.SIGN_IN_FAILED,u != null ? u.getId() : "");
+        }
+        return new ResponseBody(service.insert(user) ? ResponseCode.SIGN_UP_SUCCESS : ResponseCode.SIGN_UP_FAILED,"");
+    }
+
+    @PutMapping("update")
+    public ResponseBody update(@RequestBody User user){
+        return new ResponseBody(service.update(user) ? ResponseCode.UPDATE_SUCCESS : ResponseCode.UPDATE_FAILED,"");
+    }
+
+    @DeleteMapping("delete")
+    public ResponseBody deleteByName(@RequestParam int id){
+        return new ResponseBody(service.deleteById(id) ? ResponseCode.DELETE_SUCCESS : ResponseCode.DELETE_FAILED,"");
+    }
+
+    @GetMapping("test")
+    public String test(){
+        return "test";
+    }
+}

back/src/main/java/com/test/User.java → JavaDemo/SpringBootDemo/src/main/java/com/example/demo/entity/User.java

-package com.test;
+package com.example.demo.entity;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
 
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
@@ -6,25 +11,15 @@ import javax.persistence.GenerationType;
 import javax.persistence.Id;
 
 @Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
 public class User {
     @Id
     @GeneratedValue(strategy = GenerationType.AUTO)
     private Integer id;
-    private String name;
-
-    public Integer getId() {
-        return id;
-    }
 
-    public void setId(Integer id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
+    private String name;
+    private String password;
 }

back/src/main/java/com/test/UserRepository.java → JavaDemo/SpringBootDemo/src/main/java/com/example/demo/repository/UserRepository.java

-package com.test;
+package com.example.demo.repository;
 
-import org.springframework.data.jpa.repository.Modifying;
-import org.springframework.data.jpa.repository.Query;
+import com.example.demo.entity.User;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Repository;
 
-import java.util.List;
-
 @Repository
-public interface UserRepository extends CrudRepository<User,Integer>
-{
-    @Query(value = "select * from user where name = ?1",nativeQuery = true)
-    public List<User> findByName(String name);
-
-    @Modifying
-    @Query(value = "delete from user where name = ?1",nativeQuery = true)
-    public int deleteByName(String name);
+public interface UserRepository extends CrudRepository<User,Integer> {
+    boolean existsByName(String name);
+    User findByNameAndPassword(String name,String password);
 }

JavaDemo/SpringBootDemo/src/main/java/com/example/demo/response/ResponseBody.java

+package com.example.demo.response;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class ResponseBody {
+    private int code;
+    private Object data;
+}

JavaDemo/SpringBootDemo/src/main/java/com/example/demo/response/ResponseCode.java

+package com.example.demo.response;
+
+public class ResponseCode {
+    public static final int SIGN_IN_SUCCESS = 2000;
+    public static final int SIGN_UP_SUCCESS = 2001;
+    public static final int UPDATE_SUCCESS = 2002;
+    public static final int DELETE_SUCCESS = 2003;
+
+    public static final int SIGN_IN_FAILED = 3000;
+    public static final int SIGN_UP_FAILED = 3001;
+    public static final int UPDATE_FAILED = 3002;
+    public static final int DELETE_FAILED = 3003;
+}

JavaDemo/SpringBootDemo/src/main/java/com/example/demo/service/UserService.java

+package com.example.demo.service;
+
+import com.example.demo.entity.User;
+import com.example.demo.repository.UserRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import javax.transaction.Transactional;
+
+@Transactional
+@Service
+@RequiredArgsConstructor(onConstructor = @__(@Autowired))
+public class UserService {
+    private final UserRepository repository;
+
+    public boolean exists(User user){
+        return repository.existsByName(user.getName());
+    }
+
+    public User findByNameAndPassword(User user){
+        return repository.findByNameAndPassword(user.getName(),user.getPassword());
+    }
+
+    public boolean insert(User user){
+        repository.save(user);
+        return true;
+    }
+
+    public boolean update(User user){
+        if(repository.findById(user.getId()).isEmpty()){
+            return false;
+        }
+        repository.save(user);
+        return true;
+    }
+
+    public boolean deleteById(int id){
+        if(!repository.existsById(id)){
+            return false;
+        }
+        repository.deleteById(id);
+        return true;
+    }
+}

JavaDemo/SpringBootDemo/src/main/resources/application.yml

+spring:
+  datasource:
+    username: root
+    password: 123456
+    url: jdbc:mysql://localhost:3306/userinfo
+
+  jpa:
+    open-in-view: false
+    hibernate:
+      ddl-auto: update
\ No newline at end of file

back/src/test/java/com/test/TestApplicationTests.java → JavaDemo/SpringBootDemo/src/test/java/com/example/demo/DemoApplicationTests.java

-package com.test;
+package com.example.demo;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
 @SpringBootTest
-class TestApplicationTests {
+class DemoApplicationTests {
 
     @Test
     void contextLoads() {

KotlinDemo/AndroidDemo/.gitignore

+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

KotlinDemo/AndroidDemo/.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml

KotlinDemo/AndroidDemo/.idea/compiler.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="1.8" />
+  </component>
+</project>
\ No newline at end of file

front/.idea/gradle.xml → KotlinDemo/AndroidDemo/.idea/gradle.xml

@@ -3,13 +3,18 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <compositeConfiguration>
-          <compositeBuild compositeDefinitionSource="SCRIPT" />
-        </compositeConfiguration>
+        <option name="testRunner" value="PLATFORM" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="1.8" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
         <option name="resolveModulePerSourceSet" value="false" />
-        <option name="testRunner" value="PLATFORM" />
+        <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>
   </component>

KotlinDemo/AndroidDemo/.idea/jarRepositories.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="BintrayJCenter" />
+      <option name="name" value="BintrayJCenter" />
+      <option name="url" value="https://jcenter.bintray.com/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="Google" />
+      <option name="name" value="Google" />
+      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
+    </remote-repository>
+  </component>
+</project>
\ No newline at end of file

KotlinDemo/AndroidDemo/.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/.gitignore

+/build
\ No newline at end of file

KotlinDemo/AndroidDemo/app/build.gradle

+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.2"
+
+    buildFeatures{
+        viewBinding = true
+    }
+
+    defaultConfig {
+        applicationId "com.example.androiddemo"
+        minSdkVersion 29
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+}
+
+dependencies {
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'com.squareup.okhttp3:okhttp:4.9.0'
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.12.1'
+    implementation 'org.bouncycastle:bcprov-jdk15to18:1.68'
+    testImplementation 'junit:junit:'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}
\ No newline at end of file

KotlinDemo/AndroidDemo/app/proguard-rules.pro

+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/androidTest/java/com/example/androiddemo/ExampleInstrumentedTest.kt

+package com.example.androiddemo
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.example.androiddemo", appContext.packageName)
+    }
+}
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.androiddemo">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:usesCleartextTraffic="true"
+        android:theme="@style/Theme.AndroidDemo">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/MainActivity.kt

+package com.example.androiddemo
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.os.Message
+import android.util.Log
+import android.view.View
+import com.example.androiddemo.databinding.ActivityMainBinding
+import com.example.kotlindemo.*
+import com.fasterxml.jackson.databind.ObjectMapper
+import okhttp3.*
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.RequestBody.Companion.toRequestBody
+import java.io.IOException
+
+class MainActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityMainBinding
+    private val client = OkHttpClient()
+    private val mapper = ObjectMapper()
+    private var signInId = 0
+    private val handler = Handler(Looper.getMainLooper())
+    private val mediaType = "application/json;charset=utf-8".toMediaTypeOrNull()
+    private val message = Message()
+    private var oldName = ""
+    private var oldPassword = ""
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+    }
+
+    fun signInUp(view: View) {
+        try {
+            val name = binding.name.text.toString()
+            val password = Utils.encrypt(binding.password.text.toString())
+            val request = Request.Builder().url(NetworkSettings.SIGN_IN_UP).post(
+                    mapper.writeValueAsString(User(name, password)).toRequestBody(mediaType)
+            ).build()
+            client.newCall(request).enqueue(object : Callback {
+                override fun onFailure(call: Call, e: IOException) {
+                    message.what = ResponseCode.REQUEST_FAILED
+                    handler.post {
+                        Utils.showMessage(applicationContext, message)
+                    }
+                    e.printStackTrace()
+                }
+
+                override fun onResponse(call: Call, response: Response) {
+                    if (response.isSuccessful) {
+                        val body = response.body
+                        if (body != null) {
+                            val restResponse = mapper.readValue(body.string(), RestResponse::class.java)
+                            message.what = restResponse.code
+                            if (message.what == ResponseCode.SIGN_IN_SUCCESS) {
+                                handler.post {
+                                    signInId = restResponse.data as? Int ?: 0
+                                    binding.update.visibility = View.VISIBLE
+                                    binding.delete.visibility = View.VISIBLE
+                                    binding.signInUp.text = "退出"
+                                    binding.signInUp.setOnClickListener { signOut(false) }
+                                    oldName = binding.name.text.toString()
+                                    oldPassword = binding.password.text.toString()
+                                }
+                            }
+                        } else {
+                            message.what = ResponseCode.EMPTY_RESPONSE
+                            Log.e("RESPONSE_BODY_EMPTY", response.message)
+                        }
+                    } else {
+                        message.what = ResponseCode.SERVER_ERROR
+                        Log.e("SERVER_ERROR", response.message)
+                    }
+                    handler.post {
+                        Utils.showMessage(applicationContext, message)
+                    }
+                }
+            })
+        } catch (e: Exception) {
+            message.what = ResponseCode.JSON_SERIALIZATION
+            Utils.showMessage(applicationContext, message)
+            e.printStackTrace()
+        }
+    }
+
+    fun update(view: View) {
+        try {
+            val name = binding.name.text.toString()
+            var password = binding.password.text.toString()
+            if (name == oldName && password == oldPassword) {
+                message.what = ResponseCode.UNCHANGED_INFORMATION
+                handler.post {
+                    Utils.showMessage(applicationContext, message)
+                }
+                return
+            }
+            password = Utils.encrypt(password)
+            val request = Request.Builder().url(NetworkSettings.UPDATE).put(
+                    mapper.writeValueAsString(User(signInId, name, password)).toRequestBody(mediaType)
+            ).build()
+            client.newCall(request).enqueue(object : Callback {
+                override fun onFailure(call: Call, e: IOException) {
+                    message.what = ResponseCode.REQUEST_FAILED
+                    handler.post {
+                        Utils.showMessage(applicationContext, message)
+                    }
+                    e.printStackTrace()
+                }
+
+                override fun onResponse(call: Call, response: Response) {
+                    if (response.isSuccessful) {
+                        val body = response.body
+                        if (body != null) {
+                            val restResponse = mapper.readValue(body.string(), RestResponse::class.java)
+                            message.what = restResponse.code
+                            if (message.what == ResponseCode.UPDATE_SUCCESS) {
+                                oldName = binding.name.text.toString()
+                                oldPassword = binding.password.text.toString()
+                            }
+                        } else {
+                            message.what = ResponseCode.EMPTY_RESPONSE
+                            Log.e("RESPONSE_BODY_EMPTY", response.message)
+                        }
+                    } else {
+                        message.what = ResponseCode.SERVER_ERROR
+                        Log.e("SERVER_ERROR", response.message)
+                    }
+                    handler.post {
+                        Utils.showMessage(applicationContext, message)
+                    }
+                }
+            })
+        } catch (e: Exception) {
+            message.what = ResponseCode.JSON_SERIALIZATION
+            Utils.showMessage(applicationContext, message)
+            e.printStackTrace()
+        }
+    }
+
+    fun delete(view: View) {
+        try {
+            val request = Request.Builder().url("${NetworkSettings.DELETE}?id=$signInId").delete().build()
+            client.newCall(request).enqueue(object : Callback {
+                override fun onFailure(call: Call, e: IOException) {
+                    message.what = ResponseCode.REQUEST_FAILED
+                    handler.post {
+                        Utils.showMessage(applicationContext, message)
+                    }
+                    e.printStackTrace()
+                }
+
+                override fun onResponse(call: Call, response: Response) {
+                    if (response.isSuccessful) {
+                        val body = response.body
+                        if (body != null) {
+                            val restResponse = mapper.readValue(body.string(), RestResponse::class.java)
+                            message.what = restResponse.code
+                            if (message.what == ResponseCode.DELETE_SUCCESS) {
+                                handler.post {
+                                    signOut(true)
+                                }
+                            }
+                        } else {
+                            message.what = ResponseCode.EMPTY_RESPONSE
+                            Log.e("RESPONSE_BODY_EMPTY", response.message)
+                        }
+                    } else {
+                        message.what = ResponseCode.SERVER_ERROR
+                        Log.e("SERVER_ERROR", response.message)
+                    }
+                    handler.post {
+                        Utils.showMessage(applicationContext, message)
+                    }
+                }
+            })
+        } catch (e: Exception) {
+            message.what = ResponseCode.JSON_SERIALIZATION
+            Utils.showMessage(applicationContext, message)
+            e.printStackTrace()
+        }
+    }
+
+    fun signOut(isDeleted: Boolean) {
+        signInId = 0
+        binding.signInUp.text = "注册/登录"
+        binding.signInUp.setOnClickListener { v -> signInUp(v) }
+        binding.name.setText("")
+        binding.password.setText("")
+        binding.update.visibility = View.INVISIBLE
+        binding.delete.visibility = View.INVISIBLE
+        if (!isDeleted) {
+            message.what = ResponseCode.EXIT_SUCCESS
+        }
+        Utils.showMessage(applicationContext, message)
+    }
+}
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/NetworkSettings.kt

+package com.example.kotlindemo
+
+class NetworkSettings {
+    companion object{
+        private const val HOST = "192.168.1.8"
+        private const val PORT = "8080"
+        private const val PROTOCOL = "http"
+        const val SIGN_IN_UP = "$PROTOCOL://$HOST:$PORT/sign/in/up"
+        const val UPDATE = "$PROTOCOL://$HOST:$PORT/update"
+        const val DELETE = "$PROTOCOL://$HOST:$PORT/delete"
+    }
+}
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/ResponseCode.kt

+package com.example.kotlindemo
+
+class ResponseCode {
+    companion object{
+        const val SIGN_IN_SUCCESS = 2000
+        const val SIGN_UP_SUCCESS = 2001
+        const val UPDATE_SUCCESS = 2002
+        const val DELETE_SUCCESS = 2003
+
+        const val SIGN_IN_FAILED = 3000
+        const val SIGN_UP_FAILED = 3001
+        const val UPDATE_FAILED = 3002
+        const val DELETE_FAILED = 3003
+
+        const val EMPTY_RESPONSE = 4000
+        const val SERVER_ERROR = 4001
+        const val REQUEST_FAILED = 4002
+        const val JSON_SERIALIZATION = 4003
+        const val EXIT_SUCCESS = 4004
+        const val UNCHANGED_INFORMATION = 4005
+    }
+}
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/RestResponse.kt

+package com.example.kotlindemo
+
+data class RestResponse(var code:Int=0,var data:Any="")
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/User.kt

+package com.example.kotlindemo
+
+data class User(var id:Int=0,var name:String="",var password:String=""){
+    constructor(name: String,password: String) : this() {
+        this.name = name
+        this.password = password
+    }
+}

KotlinDemo/AndroidDemo/app/src/main/java/com/example/androiddemo/Utils.kt

+package com.example.kotlindemo
+
+import android.content.Context
+import android.os.Message
+import android.widget.Toast
+import org.bouncycastle.jcajce.provider.digest.Keccak
+import org.bouncycastle.util.encoders.Hex
+
+class Utils {
+    companion object{
+        private val digest512 = Keccak.Digest512();
+        fun encrypt(origin:String) = String(Hex.encode(digest512.digest(origin.toByteArray(Charsets.UTF_8))))
+
+        fun getResponseMessage(code:Int):String{
+            var message = ""
+            when(code){
+                ResponseCode.SIGN_IN_SUCCESS -> message = "登录成功"
+                ResponseCode.SIGN_UP_SUCCESS -> message = "注册成功"
+                ResponseCode.SIGN_IN_FAILED -> message = "用户名或密码错误"
+                ResponseCode.SIGN_UP_FAILED -> message = "注册失败"
+                ResponseCode.DELETE_FAILED -> message = "删除失败"
+                ResponseCode.DELETE_SUCCESS -> message = "删除成功,自动退出"
+                ResponseCode.UPDATE_SUCCESS -> message = "更新成功"
+                ResponseCode.UPDATE_FAILED -> message = "更新失败"
+                ResponseCode.EMPTY_RESPONSE -> message = "响应体为空"
+                ResponseCode.SERVER_ERROR -> message = "服务器错误"
+                ResponseCode.JSON_SERIALIZATION -> message = "JSON序列化错误"
+                ResponseCode.EXIT_SUCCESS -> message = "退出成功"
+                ResponseCode.REQUEST_FAILED -> message = "请求发送失败"
+                ResponseCode.UNCHANGED_INFORMATION -> message = "未修改信息"
+            }
+            return message
+        }
+
+        fun showMessage(context:Context,message:Message) =
+            Toast.makeText(context, getResponseMessage(message.what),Toast.LENGTH_SHORT).show()
+    }
+}
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/res/drawable/ic_launcher_background.xml

+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

KotlinDemo/AndroidDemo/app/src/main/res/layout/activity_main.xml

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <Button
+        android:id="@+id/signInUp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="152dp"
+        android:layout_marginTop="40dp"
+        android:onClick="signInUp"
+        android:text="@string/signInUp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/password" />
+
+    <Button
+        android:id="@+id/update"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="40dp"
+        android:layout_marginTop="40dp"
+        android:text="@string/update"
+        android:visibility="invisible"
+        android:onClick="update"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/signInUp" />
+
+    <Button
+        android:id="@+id/delete"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:visibility="invisible"
+        android:layout_marginTop="40dp"
+        android:layout_marginEnd="40dp"
+        android:text="@string/delete"
+        android:onClick="delete"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/signInUp" />
+
+    <EditText
+        android:id="@+id/name"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="100dp"
+        android:layout_marginTop="48dp"
+        android:ems="10"
+        android:inputType="textPersonName"
+        android:hint="@string/nameHint"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:ignore="LabelFor"
+        android:autofillHints="" />
+
+    <EditText
+        android:id="@+id/password"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="100dp"
+        android:layout_marginTop="28dp"
+        android:autofillHints=""
+        android:hint="@string/passwordHint"
+        android:ems="10"
+        android:inputType="textPassword"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/name"
+        tools:ignore="LabelFor" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/res/values-night/themes.xml

+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.AndroidDemo" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/res/values/colors.xml

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/res/values/strings.xml

+<resources>
+    <string name="app_name">AndroidDemo</string>
+    <string name="signInUp">注册/登录</string>
+    <string name="update">修改</string>
+    <string name="delete">删除</string>
+    <string name="name">Name</string>
+    <string name="nameHint">请输入用户名</string>
+    <string name="passwordHint">请输入密码</string>
+</resources>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/main/res/values/themes.xml

+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.AndroidDemo" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>
\ No newline at end of file

KotlinDemo/AndroidDemo/app/src/test/java/com/example/androiddemo/ExampleUnitTest.kt

+package com.example.androiddemo
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}
\ No newline at end of file

KotlinDemo/AndroidDemo/build.gradle

+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    ext.kotlin_version = "1.4.21"
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath "com.android.tools.build:gradle:4.1.2"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}
\ No newline at end of file

KotlinDemo/AndroidDemo/gradle.properties

+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app"s APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official
\ No newline at end of file