Java Socket实战之一 单线程通信 – yuanyuan

现在做Java直接使用Socket的情况是越来越少，因为有很多的选择可选，比如说可以用spring，其中就可以支持很多种远程连接的操作，另外jboss的remoting也是不错的选择，还有Apache的Mina等等，但是在有些时候一些特殊情况仍然逃脱不了直接写Socket的情况，比如公司内部一些莫名其妙的游戏规则。

废话不说了，下面就看看如果自己写Socket应该怎么做吧。

首先是写一个Server类，这个类用来监听10000端口，并从这个端口接收消息然后输出，当收到“bye”时退出。

[java] view plaincopyprint?

package com.googlecode.garbagecan.test.socket.sample1; import java.io.BufferedReader;import java.io.IOException; import java.io.InputStreamReader;import java.io.PrintWriter; import java.net.ServerSocket;import java.net.Socket; publicclass MyServer { publicstaticvoid main(String[] args) throws IOException { ServerSocket server = new ServerSocket(10000); Socket socket = server.accept(); BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream())); PrintWriter out = new PrintWriter(socket.getOutputStream()); while (true) { String msg = in.readLine(); System.out.println(msg); out.println("Server received " + msg); out.flush(); if (msg.equals("bye")) { break; } } socket.close(); } }

package com.googlecode.garbagecan.test.socket.sample1;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(10000);Socket socket = server.accept();BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));PrintWriter out = new PrintWriter(socket.getOutputStream());while (true) {String msg = in.readLine();System.out.println(msg);out.println("Server received " + msg);out.flush();if (msg.equals("bye")) {break;}}socket.close();}}

然后是一个Client类，这个类连接上面启动的Server类，然后接收任何用户输入，当遇到回车时发送字符串到Server上，当输入“bye”是退出。[java] view plaincopyprint?

package com.googlecode.garbagecan.test.socket.sample1; import java.io.BufferedReader;import java.io.InputStreamReader; import java.io.PrintWriter;import java.net.Socket; publicclass MyClient { publicstaticvoid main(String[] args) throws Exception { Socket socket = new Socket("localhost",10000); BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream())); PrintWriter out = new PrintWriter(socket.getOutputStream()); BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); while (true) { String msg = reader.readLine(); out.println(msg); out.flush(); if (msg.equals("bye")) { break; } System.out.println(in.readLine()); } socket.close(); } }

package com.googlecode.garbagecan.test.socket.sample1;import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;public class MyClient {public static void main(String[] args) throws Exception {Socket socket = new Socket("localhost", 10000);BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));PrintWriter out = new PrintWriter(socket.getOutputStream());BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));while (true) {String msg = reader.readLine();out.println(msg);out.flush();if (msg.equals("bye")) {break;}System.out.println(in.readLine());}socket.close();}}

最后，首先运行MyServer类，然后MyClient类，然后在MyClient的控制台输入任意字符，可以看到当输入bye是server和client都会退出。失败是什么?没有什么.只是更走近成功一步,