nio的字符集對象

 1 package edzy.nio;  2 
 3 import org.junit.Test;  4 
 5 import java.io.UnsupportedEncodingException;  6 import java.nio.ByteBuffer;  7 import java.nio.CharBuffer;  8 import java.nio.charset.CharacterCodingException;  9 import java.nio.charset.Charset; 10 import java.nio.charset.CharsetDecoder; 11 import java.nio.charset.CharsetEncoder; 12 
13 
14 public class Coder { 15 
16  @Test 17     public  void demo() throws CharacterCodingException, UnsupportedEncodingException { 18 
19         //獲取GBK字符集對象
20         Charset gbk = Charset.forName("GBK"); 21 
22         //獲取編碼器
23         CharsetEncoder gbkEn = gbk.newEncoder(); 24 
25         //獲取解碼器
26         CharsetDecoder gbkDe = gbk.newDecoder(); 27 
28         //字符緩衝
29         CharBuffer buffer = CharBuffer.allocate(1024); 30         buffer.put("這是一個java-nio字符集的測試"); 31  buffer.flip(); 32 
33         //編碼器編碼
34         ByteBuffer buf = gbkEn.encode(buffer); 35         for (byte b : buf.array()){ 36  System.out.println(b); 37  } 38 
39         
40         //解碼器解碼
41         CharBuffer chars = gbkDe.decode(buf); 42  System.out.println(chars.toString()); 43 
44 
45         //亂碼
46  buf.flip(); 47         Charset utf8 = Charset.forName("UTF-8"); 48         CharBuffer text = utf8.decode(buf); 49  System.out.println(text.toString()); 50 
51 
52  } 53 
54 
55 }