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));
}