fix:基础练习

data.txt

+1234567890abc
\ No newline at end of file

pom.xml

@@ -35,6 +35,16 @@
             <artifactId>lombok</artifactId>
             <version>1.18.26</version>
         </dependency>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.9.0</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>31.1-jre</version>
+        </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>

src/main/java/com/kwan/shuyu/heima/bytebuffer/ByteBuffer_001_Write.java → src/main/java/com/kwan/shuyu/heima/ByteBuffer_001_Write.java

-package com.kwan.shuyu.heima.bytebuffer;
+package com.kwan.shuyu.heima;
 
 import java.io.RandomAccessFile;
 import java.nio.ByteBuffer;

src/main/java/com/kwan/shuyu/heima/bytebuffer/ByteBuffer_002_Read.java → src/main/java/com/kwan/shuyu/heima/ByteBuffer_002_Read.java

-package com.kwan.shuyu.heima.bytebuffer;
+package com.kwan.shuyu.heima;
 
 import com.kwan.shuyu.until.ByteBufferUtil;
 

src/main/java/com/kwan/shuyu/heima/bytebuffer/ByteBuffer_003_split.java → src/main/java/com/kwan/shuyu/heima/ByteBuffer_003_split.java

-package com.kwan.shuyu.heima.bytebuffer;
+package com.kwan.shuyu.heima;
 
 /**
  * 分割数据

src/main/java/com/kwan/shuyu/heima/bytebuffer/ByteBuffer_001_Test.java

+package com.kwan.shuyu.heima.bytebuffer;
+
+import java.io.FileInputStream;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+
+/**
+ * ByteBuffer读取文件内容
+ *
+ * @author : qinyingjie
+ * @version : 2.2.0
+ * @date : 2023/4/18 17:15
+ */
+public class ByteBuffer_001_Test {
+    public static void main(String[] args) {
+        try (FileChannel channel = new FileInputStream("data.txt").getChannel()) {
+            ByteBuffer buffer = ByteBuffer.allocate(10);
+            channel.read(buffer);
+            buffer.flip();
+            while (buffer.hasRemaining()) {
+                final byte b = buffer.get();
+                System.out.println((char) b);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/com/kwan/shuyu/heima/bytebuffer/ByteBuffer_002_Test.java

+package com.kwan.shuyu.heima.bytebuffer;
+
+import lombok.extern.slf4j.Slf4j;
+
+import java.io.FileInputStream;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+
+/**
+ * ByteBuffer读取文件内容,多次读取
+ *
+ * @author : qinyingjie
+ * @version : 2.2.0
+ * @date : 2023/4/18 17:15
+ */
+@Slf4j
+public class ByteBuffer_002_Test {
+    public static void main(String[] args) {
+        try (FileChannel channel = new FileInputStream("data.txt").getChannel()) {
+            ByteBuffer buffer = ByteBuffer.allocate(10);
+            while (true) {
+                final int len = channel.read(buffer);
+                log.info("read len {}", len);
+                if (len == -1) {//表示未读到数据
+                    break;
+                }
+                buffer.flip();//读模式
+                while (buffer.hasRemaining()) {
+                    final byte b = buffer.get();
+                    log.info("实际字节 {}", (char) b);
+                }
+                buffer.clear();//写模式
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

target/classes/word2.txt

+helloworld秦书予
\ No newline at end of file