Java NIO之字符集Charset代码实例

男娘i 2023-06-11 07:24 27阅读 0赞

### 文章目录 ###

*   *  代码实例

**相关Java NIO详解：** [Java NIO详解][Java NIO]

## 代码实例 ##

import org.junit.Test;
    
    import java.nio.ByteBuffer;
    import java.nio.CharBuffer;
    import java.nio.charset.CharacterCodingException;
    import java.nio.charset.Charset;
    import java.nio.charset.CharsetDecoder;
    import java.nio.charset.CharsetEncoder;
    import java.util.Map;
    import java.util.Set;
    
    /** * 字符集（Charset） * 编码：字符串-->字节数组 * 解码：字节数组-->字符串 */
    
    public class CharsetDemo { 
    
        @Test
        public void charSetEncoderAndDecoder() throws CharacterCodingException { 
            Charset charset=Charset.forName("UTF-8");
            //1.获取编码器
            CharsetEncoder charsetEncoder=charset.newEncoder();
            //2.获取解码器
            CharsetDecoder charsetDecoder=charset.newDecoder();
    
            //3.获取需要解码编码的数据
            CharBuffer charBuffer=CharBuffer.allocate(1024);
            charBuffer.put("字符集编码解码");
            charBuffer.flip();
    
            //4.编码
            ByteBuffer byteBuffer=charsetEncoder.encode(charBuffer);
            System.out.println("编码后：");
            for (int i=0;i<byteBuffer.limit();i++) { 
                System.out.println(byteBuffer.get());
            }
            //5.解码
            byteBuffer.flip();
            CharBuffer charBuffer1=charsetDecoder.decode(byteBuffer);
            System.out.println("解码后：");
            System.out.println(charBuffer1.toString());
            System.out.println("指定其他格式解码:");
            Charset charset1=Charset.forName("GBK");
            byteBuffer.flip();
            CharBuffer charBuffer2 =charset1.decode(byteBuffer);
            System.out.println(charBuffer2.toString());
            //6.获取Charset所支持的字符编码
             Map<String ,Charset> map= Charset.availableCharsets();
             Set<Map.Entry<String,Charset>>  set=map.entrySet();
            for (Map.Entry<String,Charset> entry: set
                 ) { 
                System.out.println(entry.getKey()+"="+entry.getValue().toString());
            }
        }
    
    
    
    }

[Java NIO]: https://blog.csdn.net/use_admin/article/details/102679985