java网络编程（二）多线程网络编程

来源：互联网发布：建筑网络编辑：程序博客网时间：2024/04/28 05:25

通过上面第一章的程序可以看出来，针对服务端只能连接一个客户端，如果有另外一台机器连接主机就会出现错误，连接不上，主要是因为第一章的代码是单线程的，也就是是单对单的服务，服务端server接收到一个client请求后,后面的client请求就无法连接上主机了

下面是多线程的网络通信服务端代码:

package com.sun.net;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 ManyThreadSocketServer {     private int port = 10000;          private ServerSocket server;          public ManyThreadSocketServer() throws IOException{            server = new ServerSocket( port);     }          public void talk() throws IOException{            while( true){                Socket socket = server.accept();                invoke(socket);           }     }     public void invoke(final Socket socket){            new Thread( new Runnable() {                 @Override                 public void run() {                      try {                           BufferedReader br = getReader(socket);                           PrintWriter pw = getWriter(socket);                                                      String msg = null;                            while( true){                                msg = br.readLine();                                System. err.println(msg);                                                                pw.println( "server:" + msg);                                pw.flush();                                                                 if(msg.equals( "bye")){                                      break;                                }                           }//                         socket.close();//                         if( br != null){//                              br.close();//                         }//                         if( pw != null){//                              pw.close();//                         }                     } catch (Exception e) {                           e.printStackTrace();                     }                }            }).start();     }     public BufferedReader getReader(Socket socket) throws Exception{            return new BufferedReader( new InputStreamReader(socket.getInputStream()));     }     public PrintWriter getWriter(Socket socket) throws Exception{            return new PrintWriter(socket.getOutputStream());     }     public static void main(String[] args) throws Exception {            new ManyThreadSocketServer().talk();     }}

客户端代:通过获取系统输入向服务端发送数据信息

package com.sun.net;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.Socket;

public class ManyThreadSocketClient {

private String serverIp;

private int port;

private Socket socket ;

public ManyThreadSocketClient() {

serverIp = "192.168.1.103";

port = 10000;

}

public BufferedReader getReader( Socket socket) throws Exception{

return new BufferedReader( new InputStreamReader(System.in));

}

public PrintWriter getWriter( Socket socket) throws Exception{

return new PrintWriter(socket.getOutputStream());

}

public void speak(){

try {

socket = new Socket(serverIp,port);

BufferedReader br = getReader( socket);

PrintWriter pw = getWriter( socket);

String msg = null;

while( true){

msg = br.readLine();

pw.println(msg);

pw.flush();

if(msg.equals( "bye")){

break;

}

socket.close();

if(br != null){

br.close();

}

if(pw != null){

pw.close();

}

} catch (Exception e) {

e.printStackTrace();

}

public static void main(String[] args) {

new ManyThreadSocketClient().speak();

}

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