Java Socket编程标准范例（多线程）

最新推荐文章于 2025-09-09 08:37:13 发布

最新推荐文章于 2025-09-09 08:37:13 发布 · 64 阅读

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#java #操作系统

本文介绍了一个简单的Java网络编程示例，包括服务器端和客户端的实现。服务器端支持单线程和多线程处理，能够接收客户端发送的消息并作出响应。客户端能够向服务器发送消息，并接收服务器返回的消息。

服务器端（Server）非多线程

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）

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

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