七、Java IO流 之管道流

管道流的处理和线程有关。

管道图解

在java.io包里面如果要想实现线程的通讯管道，使用两个类完成：
PipedOutputStream、PipedInputStream

类的继承关系：
public class PipedOutputStream extends OutputStream
public class PipedInputStream extends InputStream

例：利用管道流实现两个线程之间的通信

class SendThread implements Runnable {

    private PipedOutputStream OutputStream = new PipedOutputStream();

    @Override
    public void run() {
        try {
            this.OutputStream.write("再见等于再也不见".getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }


    }

    public PipedOutputStream getOutput() {
        return OutputStream;
    }

}


class ReceiveThread implements Runnable {

    private PipedInputStream inputStream = new PipedInputStream();

    @Override
    public void run() {
        byte data[] = new byte[1024];
        try {
            int len = this.inputStream.read(data);
            System.out.println("接收数据  " + new String(data, 0, len));

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public PipedInputStream getIput() {
        return inputStream;
    }

}


public class TestDemo_05 {
    public static void main(String[] args) throws Exception {
        SendThread send = new SendThread();
        ReceiveThread receive = new ReceiveThread();

        send.getOutput().connect(receive.getIput()); //管道对接

        new Thread(send).start();
        new Thread(receive).start();

    }
}

执行结果：

管道流主要应用在不同线程的通讯处理上。