多线程之间的通信~~~管道通道

多线程之间的通信~~~管道通道

管道流:主要用于线程之间的通信传输的媒介是内存!传输的媒介是内存,传输的媒介是内存,传输的媒介是内存

其实就跟咱之前学得io 流操作一致,只是在io 流 基础上结合了线程(任务)的知识!

(ps: 线程之间的通信模式:生产者消费者模式通过“信息通道”------内存缓存区)

(1)字节流、字符流的管道通道

字节流:PipedInputStream,PipedOutputStream

字符流:PipedRead、PipedWriter

(2) 将输入流和输出流进行连接,用connect() 方法,方便在多个线程中传输数据。

writer.connect(reader);     //等价于 reader.connect(writer);  因为你连我,就是我连你呀

(3) 连接后,两个线程就可以进行通信了。相当于通过写入通道写入的资源 流通到了(connect)  读取通道里。

        //发送消息、接收消息
        new Thread(new SendMessegeTask(pipOutStream)).start();
        new Thread(new AcceptMessegeTask(pipedInStream)).start();

案例代码:

   发送消息 class SendMessegeTask

package ChatWithSelf;

import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.util.Scanner;

/**
 * 发送消息
 * @author Huangyujun
 *
 */
public class SendMessegeTask implements Runnable {
    private PipedOutputStream pipOutStream;
    public SendMessegeTask(PipedOutputStream pipOutStream) {
        this.pipOutStream = pipOutStream;
    }
    Scanner scanner = new Scanner(System.in);
    @Override
    public void run() {
        while(true) {
            // 不断地写入
            System.out.println("请输入要发生的内容:");
            String content = scanner.next();
            byte[] byteContent = content.getBytes();
//            new byte[1024];
//            byteContent = content.getBytes();
            try {
                pipOutStream.write(byteContent, 0, byteContent.length);
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
    
}

 

 接收消息 class AcceptMessegeTask

package ChatWithSelf;

import java.io.IOException;
import java.io.PipedInputStream;

/**
 * 接收消息
 * @author Huangyujun
 *
 */
public class AcceptMessegeTask implements Runnable{
    private PipedInputStream pipedInStream;
    public AcceptMessegeTask(PipedInputStream pipedInStream) {
        this.pipedInStream = pipedInStream;
    }
    
    @Override
    public void run() {
        while(true) {
            // 不断地读取,前面接收的是字节数组的内容
            byte[] buffer = new byte[1024];
            int read = -1;
            try {
                while((read = pipedInStream.read(buffer)) != -1) {
                    //打印到公屏上
                    System.out.println(new String(buffer));
                    //为下一次做空间准备
                    buffer = new byte[1024];
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }    
    }

}

  管道通信 class Piped

package ChatWithSelf;

import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.util.Scanner;

/**
 * 管道通信
 * @author Huangyujun
 *
 */
public class Piped {
    public static void main(String[] args) throws IOException {
        PipedInputStream pipedInStream = new PipedInputStream();
        PipedOutputStream pipOutStream = new PipedOutputStream();
        //联通
//        pipOutStream.connect(pipedInStream);
        pipedInStream.connect(pipOutStream);
        //发送消息、接收消息
        new Thread(new SendMessegeTask(pipOutStream)).start(); 
        new Thread(new AcceptMessegeTask(pipedInStream)).start(); 
    }
}

 参考:老九学堂~《java线上训练营~网络编程~多线程之间的另外一种通信方式管道通道》

 
 
 
原文地址:https://www.cnblogs.com/shan333/p/14798297.html