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最新推荐文章于 2025-08-23 15:39:08 发布

最新推荐文章于 2025-08-23 15:39:08 发布 · 73 阅读

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#J2SE #Socket #Java #编程 #.net

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本文介绍了一个简单的Java网络编程示例，包括Server端和Client端的实现。通过ServerSocket监听特定端口并接受客户端连接请求，客户端可以发送消息给服务器，并接收服务器响应。该示例展示了如何使用Socket进行基本的网络通信。

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2006.10.13      晴
      网络编程,知道了编程是在OSI中的表示层,而套接字Socket则是在传输层中的概念,其中的ServerSocket,Socket重点内容,因为在网络编程当中几乎都要使用到它们,端口(0-65535)分为三类:公认端口(0-1023),注册端口(1024-49151),动态或私有端口(49152-65535).
   还是看个例子吧!
   先看Server端的:
package com.softeem.socket;

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

public class TestServer {

private static final String QUIT = "quit";

public void startServer() {
  try {
   ServerSocket listener = new ServerSocket(1234);
   Socket ss = listener.accept();
   BufferedReader serverIn = new BufferedReader(new InputStreamReader(
     ss.getInputStream()));
   PrintStream serverOut = new PrintStream(ss.getOutputStream());

serverOut.println("Welcome to the test server");
System.out.println(serverIn.readLine());

   String fromClientInfo = null;
   while ((fromClientInfo = serverIn.readLine()) != null) {
    System.out.println(fromClientInfo);
    if (QUIT.equalsIgnoreCase(fromClientInfo)) {
     System.exit(0);
    }
   }
   serverOut.close();
   serverIn.close();
   ss.close();
  } catch (IOException e) {
   e.printStackTrace();
  }

}

/**
* @param args
*/
public static void main(String[] args) {
TestServer server = new TestServer();
server.startServer();
}

}
再看看client端的:
package com.softeem.socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;

public class TestClient {

private static final String QUIT = "quit";
public void startClient(){

  try {
   Socket cs = new Socket("localhost",1234);
   BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
   BufferedReader clientIn = new BufferedReader(new InputStreamReader(cs.getInputStream()));
   PrintStream clientOut = new PrintStream(cs.getOutputStream());

   System.out.println(clientIn.readLine());
   clientOut.println("hello i am here");
   System.out.println("Please send some string to server");

   String toServerInfo = null;
   while( (toServerInfo = in.readLine())!= null){
    clientOut.println(toServerInfo);
    if (QUIT.equalsIgnoreCase(toServerInfo)){
     System.exit(0);
    }
   }

   clientIn.close();
   clientOut.close();
   cs.close();
  } catch (UnknownHostException e) {
   e.printStackTrace();
  } catch (IOException e) {

   e.printStackTrace();
  }

}
/**
* @param args
*/
public static void main(String[] args) {
  TestClient client = new TestClient();
  client.startClient();
}
}