ReentrantReadWriteLock共享锁排他锁

static class ReentrantWriteReadDemo{
        //共享锁 排他锁
    ReentrantReadWriteLock readWriteLock;

    //共享锁，所有线程可同时获得 并发量高。比如在线文档查看
    ReentrantReadWriteLock.ReadLock readlock;
    //排他锁 同一时刻只有一个线程有权修改资源。比如在线文档编辑
    ReentrantReadWriteLock.WriteLock writeLock;
        public ReentrantWriteReadDemo() {
            readWriteLock = new ReentrantReadWriteLock();
            readlock = readWriteLock.readLock();
            writeLock = readWriteLock.writeLock();
    }
    public void read(){
            String name = Thread.currentThread().getName();
            try{
                readlock.lock();
                System.out.println(name+"正在读...");
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            } finally {
                readlock.unlock();
                System.out.println(name+"读完了...");
            }
    }public void write(){
            String name = Thread.currentThread().getName();
            try{
                writeLock.lock();
                System.out.println(name+"正在写入...");
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            } finally {
                writeLock.unlock();
                System.out.println(name+"写入完毕...");
            }
    }
}