Java Socket多线程异步通信

服务端

package com.ninemax.socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class SocketServer {
	
	public static void main(String[] args) {
		try {
			// 监听端口
			ServerSocket server = new ServerSocket(9999);
			// 获取客户端链接
			Socket client = server.accept();
			// 获取客户端输入流
			BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
			// 获取客户端输出流
			PrintWriter out = new PrintWriter(client.getOutputStream());
			// 获取系统输入流
			BufferedReader sys_in = new BufferedReader(new InputStreamReader(System.in));
			// 启动接收消息线程
			new ReceiveMsgThread(server, in, out, sys_in, client).start();
			// 启动发送消息线程
			new SendMsghread(out, sys_in, true).start();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

客户端

package com.ninemax.socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class SocketClient {
	
	public static void main(String[] args) {
		try {
			// 获取客户端链接
			Socket client = new Socket(InetAddress.getLocalHost(), 9999);
			System.out.println("客户端是否连接成功:" + client.isConnected());
			// 获取客户端输入流
			BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
			// 获取系统输入流
			BufferedReader sys_in = new BufferedReader(new InputStreamReader(System.in));
			// 获取客户端输出流
			PrintWriter out = new PrintWriter(client.getOutputStream());
			// 启动发送消息线程
			new SendMsghread(out, sys_in, false).start();
			// 启动接收消息线程
			new ReceiveMsgThread(client, in, out, sys_in).start();
		} catch (UnknownHostException e) {
			System.out.println("Host is error!");
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

发送消息线程

package com.ninemax.socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;

public class SendMsghread extends Thread {

	// 输出流
	PrintWriter out;
	// 输入流
	BufferedReader in;
	// 判断服务器是否启动
	boolean isServer;

	public SendMsghread(PrintWriter out, BufferedReader in, boolean isServer) {
		this.out = out;
		this.in = in;
		this.isServer = isServer;
	}
	
	@Override
    public void run() {
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        
        try {
            while(true){
                if(isServer){
                    out.println("Server  "+sf.format(new Date())+"\n\t"+ in.readLine());
                }else{
                    out.println("client  "+sf.format(new Date())+"\n\t"+ in.readLine());
                }
                out.flush();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        
    }
}

接收消息线程

package com.ninemax.socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class ReceiveMsgThread extends Thread {
	// 输入流
	BufferedReader in;
	// 输入流
	BufferedReader sys_in;
	// 输出流
	PrintWriter out;
	// 服务端socket
	ServerSocket server;
	// 客户端socket
	Socket client;

	public ReceiveMsgThread(ServerSocket server, BufferedReader in,
			PrintWriter out, BufferedReader sys_in, Socket client) {
		this.in = in;
		this.server = server;
		this.client = client;
		this.out = out;
		this.sys_in = sys_in;
	}

	public ReceiveMsgThread(Socket client,BufferedReader in, PrintWriter out,
			BufferedReader sys_in) {
		this.in = in;
		this.client = client;
		this.out = out;
		this.sys_in = sys_in;
	}

	  @Override
	    public void run() {
	        try {
	            while(true){
	                String info = in.readLine();
	                while(info !=null){
	                    System.out.println(info);
	                    info = in.readLine();
	                }
	                if(in.readLine().equals("end")){
	                    break;
	                }
	            }
	            in.close();
	            out.close();
	            sys_in.close();
	            if(client != null){
	                client.close();
	            }
	            server.close();
	        } catch (IOException e) {
	            e.printStackTrace();
	        }
	    }
}

运行结果图

来源：oschina

链接：https://my.oschina.net/u/2400848/blog/1510598