Initial commit

pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.alibaba</groupId>
+    <artifactId>springboot-login</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.10.RELEASE</version>
+    </parent>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <!--可以进行热部署  如不需要，可以不配置 idea默认运行期间不自动编译 需要提前配置一下-->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-devtools</artifactId>
+        </dependency>
+        <!--mybatis-->
+        <dependency>
+            <groupId>org.mybatis.spring.boot</groupId>
+            <artifactId>mybatis-spring-boot-starter</artifactId>
+            <version>1.3.1</version>
+        </dependency>
+        <!--整合mysql-->
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+        <!--json @responseBody/@requestBody-->
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>fastjson</artifactId>
+            <version>1.2.54</version>
+        </dependency>
+    </dependencies>
+
+</project>
\ No newline at end of file

src/main/java/com/alibaba/Application.java

+package com.alibaba;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @SpringBootApplication相当于3个注解
+ * 1. @Configuration  定义一个配置类
+ * 2. @EnableAutoConfiguration spring boot自动根据jar包的依赖来自动配置项目
+ * 3. @ComponentScan  spring自动扫描类上的注解, 并注入spring容器
+ */
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class,args);
+    }
+
+}

src/main/java/com/alibaba/bean/Result.java

+package com.alibaba.bean;
+
+/**
+ * 向前端返回信息封装
+ * @param <T> 可变类型
+ */
+public class Result<T> {
+    /**
+     * 返回信息
+     */
+    private String msg;
+
+    /**
+     * 数据是否正常请求
+     */
+    private boolean success;
+
+    /**
+     * 具体返回的数据
+     */
+    private T detail;
+
+    public String getMsg() {
+        return msg;
+    }
+
+    public void setMsg(String msg) {
+        this.msg = msg;
+    }
+
+    public boolean isSuccess() {
+        return success;
+    }
+
+    public void setSuccess(boolean success) {
+        this.success = success;
+    }
+
+    public T getDetail() {
+        return detail;
+    }
+
+    public void setDetail(T detail) {
+        this.detail = detail;
+    }
+}

src/main/java/com/alibaba/bean/User.java

+package com.alibaba.bean;
+
+/**
+ * 用户信息
+ */
+public class User {
+    private Long id;
+    private String username;
+    private String password;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

src/main/java/com/alibaba/controller/UserController.java

+package com.alibaba.controller;
+
+import com.alibaba.bean.Result;
+import com.alibaba.bean.User;
+import com.alibaba.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/user")
+public class UserController {
+
+    @Autowired
+    private UserService userService;
+
+    /**
+     * 注册
+     * @param user 参数封装
+     * @return Result
+     */
+    @PostMapping(value = "/regist")
+    public Result regist(User user){
+        return userService.regist(user);
+    }
+
+    /**
+     * 登录
+     * @param user 参数封装
+     * @return Result
+     */
+    @PostMapping(value = "/login")
+    public Result login(User user){
+        return userService.login(user);
+    }
+}
+

src/main/java/com/alibaba/mapper/UserMapper.java

+package com.alibaba.mapper;
+
+import com.alibaba.bean.User;
+import org.apache.ibatis.annotations.*;
+import org.springframework.stereotype.Repository;
+
+/**
+ * mapper的具体表达式
+ */
+@Mapper //标记mapper文件位置，否则在Application.class启动类上配置mapper包扫描
+@Repository
+public interface UserMapper {
+
+    /**
+     * 查询用户名是否存在，若存在，不允许注册
+     * 注解@Param(value) 若value与可变参数相同，注解可省略
+     * 注解@Results  列名和字段名相同，注解可省略
+     * @param username
+     * @return
+     */
+    @Select(value = "select u.username,u.password from user u where u.username=#{username}")
+    @Results
+            ({@Result(property = "username",column = "username"),
+              @Result(property = "password",column = "password")})
+    User findUserByName(@Param("username") String username);
+
+    /**
+     * 注册  插入一条user记录
+     * @param user
+     * @return
+     */
+    @Insert("insert into user values(#{id},#{username},#{password})")
+    //加入该注解可以保存对象后，查看对象插入id
+    @Options(useGeneratedKeys = true,keyProperty = "id",keyColumn = "id")
+    void regist(User user);
+
+    /**
+     * 登录
+     * @param user
+     * @return
+     */
+    @Select("select u.id from user u where u.username = #{username} and password = #{password}")
+    Long login(User user);
+}

src/main/java/com/alibaba/service/UserService.java

+package com.alibaba.service;
+
+import com.alibaba.bean.Result;
+import com.alibaba.bean.User;
+import com.alibaba.mapper.UserMapper;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Transactional(rollbackFor = RuntimeException.class)
+public class UserService {
+
+    @Autowired
+    private UserMapper userMapper;
+    /**
+     * 注册
+     * @param user 参数封装
+     * @return Result
+     */
+    public Result regist(User user) {
+        Result result = new Result();
+        result.setSuccess(false);
+        result.setDetail(null);
+        try {
+            User existUser = userMapper.findUserByName(user.getUsername());
+            if(existUser != null){
+                //如果用户名已存在
+                result.setMsg("用户名已存在");
+
+            }else{
+                userMapper.regist(user);
+                //System.out.println(user.getId());
+                result.setMsg("注册成功");
+                result.setSuccess(true);
+                result.setDetail(user);
+            }
+        } catch (Exception e) {
+            result.setMsg(e.getMessage());
+            e.printStackTrace();
+        }
+        return result;
+    }
+    /**
+     * 登录
+     * @param user 用户名和密码
+     * @return Result
+     */
+    public Result login(User user) {
+        Result result = new Result();
+        result.setSuccess(false);
+        result.setDetail(null);
+        try {
+            Long userId= userMapper.login(user);
+            if(userId == null){
+                result.setMsg("用户名或密码错误");
+            }else{
+                result.setMsg("登录成功");
+                result.setSuccess(true);
+                user.setId(userId);
+                result.setDetail(user);
+            }
+        } catch (Exception e) {
+            result.setMsg(e.getMessage());
+            e.printStackTrace();
+        }
+        return result;
+    }
+}

src/main/resources/application.yml

+server:
+  port: 9090
+spring:
+  datasource:
+    driver-class-name: com.mysql.jdbc.Driver
+    url: jdbc:mysql://localhost:3306/login?useUnicode=true&characterEncoding=utf-8&useSSL=false
+    username: root
+    password: 123456
+  resources:
+    static-locations: classpath:/templates  #访问静态页面
\ No newline at end of file

src/main/resources/templates/login.html

+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>用户登录</title>
+</head>
+<body>
+<form action="/user/login" method="post">
+    用户名:<input name="username" type="text"/><br>
+    密码:<input name="password" type="password"> <br>
+    <input type="submit" value="登录">
+</form>
+</body>

src/main/resources/templates/regist.html

+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>用户注册</title>
+</head>
+<body>
+<form action="/user/regist" method="post">
+    用户名:<input name="username" type="text"/><br>
+    密码:<input name="password" type="password"> <br>
+    <input type="submit" value="注册">
+</form>
+</body>