http://my.oschina.net/clopopo/blog/140479
public class TASLock { private AtomicBoolean state = new AtomicBoolean(false); publicvoidlock() { while (state.getAndSet(true)) {} } public void unlock() { state.set(false); } }public class TTASLock { private AtomicBoolean state = new AtomicBoolean(false); // 加锁 public void lock() { while (true) { while (state.get()) { // 自旋 } if (!state.getAndSet(true)) { break; } } } public void unlock() { state.set(false); }}原文：http://www.cnblogs.com/WeRtogether/p/4487972.html