Java Socket编程 标准范例（多线程）

链接地址：http://blog.csdn.net/benweizhu/article/details/6615542

服务器端（Server）非多线程

[java] view plain copy

package com.zeph.serverclient;

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 MyServer {

public static void main(String[] args) throws IOException {

ServerSocket server = new ServerSocket(5678);

Socket client = server.accept();

BufferedReader in = new BufferedReader(new InputStreamReader(

client.getInputStream()));

PrintWriter out = new PrintWriter(client.getOutputStream());

while (true) {

String str = in.readLine();

System.out.println(str);

out.println("has receive....");

out.flush();

if (str.equals("end"))

break;

}

client.close();

}

}

客户端（Client）

[java] view plain copy

package com.zeph.serverclient;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.InetAddress;

import java.net.Socket;

public class MyClient {

static Socket server;

public static void main(String[] args) throws Exception {

server = new Socket(InetAddress.getLocalHost(), 5678);

BufferedReader in = new BufferedReader(new InputStreamReader(

server.getInputStream()));

PrintWriter out = new PrintWriter(server.getOutputStream());

BufferedReader wt = new BufferedReader(new InputStreamReader(System.in));

while (true) {

String str = wt.readLine();

out.println(str);

out.flush();

if (str.equals("end")) {

break;

}

System.out.println(in.readLine());

}

server.close();

}

}

服务器端（Server）多线程

[java] view plain copy

package com.zeph.multiclient;

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 MultiClient extends Thread {

private Socket client;

public MultiClient(Socket c) {

this.client = c;

}

public void run() {

try {

BufferedReader in = new BufferedReader(new InputStreamReader(

client.getInputStream()));

PrintWriter out = new PrintWriter(client.getOutputStream());

// Mutil User but can't parallel

while (true) {

String str = in.readLine();

System.out.println(str);

out.println("has receive....");

out.flush();

if (str.equals("end"))

break;

}

client.close();

} catch (IOException ex) {

} finally {

}

}

public static void main(String[] args) throws IOException {

ServerSocket server = new ServerSocket(5678);

while (true) {

// transfer location change Single User or Multi User

MultiClient mc = new MultiClient(server.accept());

mc.start();

}

}

}

测试这个代码的时候可以直接用DOS控制台上面运行，这样看的效果更清楚！

服务器基本步骤：

1.指定端口实例化一个SeverSocket

2.调用ServerSocket的accept()方法，以在等待连接期间造成阻塞

3.获取位于该底层的Socket的流以进行读写操作

4.将数据封装成流

5.对Socket进行读写

6.关闭打开的流

客户端基本步骤：

1.通过IP地址和端口实例化Socket，请求连接服务器

2.获得Socket上的流以进行读写

3.把流封装进BufferedReader/PrintWriter的实例

4.对Socket进行读写

5.关闭打开的流