非常简单的socket例子

最新推荐文章于 2020-12-08 19:27:28 发布

原创最新推荐文章于 2020-12-08 19:27:28 发布 · 1.6k 阅读

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#socket #import #string #null #exception #class

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本文提供了一个Java Socket通信的示例程序，包括服务器端和客户端的实现。通过该示例，读者可以了解如何使用Java进行Socket编程，实现基本的数据收发功能。

socket server类，接收请求

package com.wonder.socketexample;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;

public class SocketServer {

ServerSocket serverSocket = null;
Socket socket = null;
DataInputStream inStream = null;
DataOutputStream outStream = null;

public SocketServer() {
  try {
   serverSocket = new ServerSocket(6600);
  } catch (IOException e) {
   e.printStackTrace();
  }
}

public static void main(String[] args) {
SocketServer socketServer = new SocketServer();
socketServer.waitForClient();
}

public void waitForClient() {

  try {
   // 获取socket，设置inStream和outStream
   socket = serverSocket.accept();

   inStream = new DataInputStream(socket.getInputStream());
   outStream = new DataOutputStream(socket.getOutputStream());
   outStream.writeUTF("ready!");
//   socket.setSoTimeout(3000);
   // 接收和发送数据
   acceptAndSendData();

  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

}

private void acceptAndSendData() {
boolean flag = true;

  while (flag) {
   try {
    String acceptStr = inStream.readUTF();
    System.out.println("客户端输入信息:" + acceptStr);

    if ("exit".equals(acceptStr)) {
     System.out.println("服务结束。");
     break;
    } else {
     String sendStr = String.valueOf("服务器处理："+new Date());
     outStream.writeUTF(sendStr);
    }
   } catch (IOException e) {
    e.printStackTrace();
    break;
   }
  }

}

-----------------------------------------

socketclient例子，输入内容，然后发给socket ,exit退出

package com.wonder.socketexample;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.net.UnknownHostException;

public class SocketClient {

Socket socket = null;
DataInputStream inStream = null;
DataOutputStream outStream = null;

public SocketClient() {
  try {
   init();
   waitData();
  } catch (UnknownHostException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }

}

private void waitData() {
  boolean flag = true;
  while (flag) {
   try {
    String acceptStr = inStream.readUTF();
    System.out.println("客户端接收到: " + acceptStr);
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
          String str = "";
          while (str != null) {
              System.out.print("> prompt ");
              str = in.readLine();
              if("exit".equals(str)){
              System.out.println("系统退出。");
              outStream.writeUTF(str);
              return;
              }
              outStream.writeUTF(str);
          }
   } catch (Exception e) {
    e.printStackTrace();
    break;
   }

}

private void init() throws UnknownHostException, IOException {
  socket = new Socket("127.0.0.1", 6600);
  inStream = new DataInputStream(socket.getInputStream());
  outStream = new DataOutputStream(socket.getOutputStream());
//  socket.setSoTimeout(3000);
}

public static void main(String[] args) {
SocketClient client = new SocketClient();
}

}