示例#1
0
 static char[] decode(byte[] bb, Charset cs, boolean testDirect, Time t) throws Exception {
   String csn = cs.name();
   CharsetDecoder dec = cs.newDecoder();
   ByteBuffer bbf;
   CharBuffer cbf;
   if (testDirect) {
     bbf = ByteBuffer.allocateDirect(bb.length);
     cbf = ByteBuffer.allocateDirect(bb.length * 2).asCharBuffer();
     bbf.put(bb);
   } else {
     bbf = ByteBuffer.wrap(bb);
     cbf = CharBuffer.allocate(bb.length);
   }
   CoderResult cr = null;
   long t1 = System.nanoTime() / 1000;
   for (int i = 0; i < iteration; i++) {
     bbf.rewind();
     cbf.clear();
     dec.reset();
     cr = dec.decode(bbf, cbf, true);
   }
   long t2 = System.nanoTime() / 1000;
   t.t = (t2 - t1) / iteration;
   if (cr != CoderResult.UNDERFLOW) {
     System.out.println("DEC-----------------");
     int pos = bbf.position();
     System.out.printf(
         "  cr=%s, bbf.pos=%d, bb[pos]=%x,%x,%x,%x%n",
         cr.toString(),
         pos,
         bb[pos++] & 0xff,
         bb[pos++] & 0xff,
         bb[pos++] & 0xff,
         bb[pos++] & 0xff);
     throw new RuntimeException("Decoding err: " + csn);
   }
   char[] cc = new char[cbf.position()];
   cbf.flip();
   cbf.get(cc);
   return cc;
 }
 public static void main(String[] args) throws Exception {
   // 创建简体中文对应的Charset
   Charset cn = Charset.forName("GBK");
   // 获取cn对象对应的编码器和解码器
   CharsetEncoder cnEncoder = cn.newEncoder();
   CharsetDecoder cnDecoder = cn.newDecoder();
   // 创建一个CharBuffer对象
   CharBuffer cbuff = CharBuffer.allocate(8);
   cbuff.put('孙');
   cbuff.put('悟');
   cbuff.put('空');
   cbuff.flip();
   // 将CharBuffer中的字符序列转换成字节序列
   ByteBuffer bbuff = cnEncoder.encode(cbuff);
   // 循环访问ByteBuffer中的每个字节
   for (int i = 0; i < bbuff.capacity(); i++) {
     System.out.print(bbuff.get(i) + " ");
   }
   // 将ByteBuffer的数据解码成字符序列
   System.out.println("\n" + cnDecoder.decode(bbuff));
 }