使用ReentrantLock

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public class TestLock {public TestLock() {// TODO Auto-generated constructor stub}public void reentrantLock() {boolean useSynchronized = false;IBuffer buff = null;              if(useSynchronized){                buff = new Buffer();              }else{                buff = new BufferInterruptibly();                 }        final Writer writer = new Writer(buff);        final Reader reader = new Reader(buff);                writer.start();        reader.start();                new Thread(new Runnable() {            public void run() {                long start = System.currentTimeMillis();                for (;;) {                    // 等5秒钟去中断读                    if (System.currentTimeMillis() - start > 5000) {                        System.out.println("不等了，尝试中断");                        reader.interrupt();                        break;                    }                }            }        }).start();}public static void main(String[] args) {new TestLock().reentrantLock();}interface IBuffer{    public void write();    public void read() throws InterruptedException;}public class Buffer implements IBuffer{    private Object lock;    public Buffer() {        lock = this;    }    public void write() {        synchronized (lock) {            long startTime = System.currentTimeMillis();            System.out.println("开始往这个buff写入数据…");            for (;;)// 模拟要处理很长时间            {                if (System.currentTimeMillis() - startTime > 30000)                    break;            }            System.out.println("终于写完了");        }    }    public void read() {        synchronized (lock) {            System.out.println("从这个buff读数据");        }    }}class BufferInterruptibly implements IBuffer{    private ReentrantLock lock = new ReentrantLock();    public void write() {        lock.lock();        try {            long startTime = System.currentTimeMillis();            System.out.println("开始往这个buff写入数据…");            for (;;)// 模拟要处理很长时间            {                if (System.currentTimeMillis() - startTime > 30000)                    break;            }            System.out.println("终于写完了");        } finally {            lock.unlock();        }    }    public void read() throws InterruptedException{        lock.lockInterruptibly();// 注意这里，可以响应中断//    boolean lockFlag = lock.tryLock(5, TimeUnit.SECONDS);        try {            System.out.println("从这个buff读数据");        } finally {        lock.unlock();        }    }}class Writer extends Thread {    private IBuffer buff;    public Writer(IBuffer buff) {        this.buff = buff;    }    @Override    public void run() {        buff.write();    }}class Reader extends Thread {    private IBuffer buff;    public Reader(IBuffer buff) {        this.buff = buff;    }    @Override    public void run() {        try {            buff.read();        } catch (InterruptedException e) {            System.out.println("我不读了");          }        System.out.println("读结束");    }}}
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