java eclipse 简单的局域网聊天 webservice

来源：互联网发布：java分布式开发是什么编辑：程序博客网时间：2024/06/07 10:05

1.创建一个java project 项目，创建Client和Server 两个类

2.Client 类的内容

package web_service;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class WeatherClient {
public static void main(String[] args) throws UnknownHostException, IOException{
Scanner in = new Scanner(System.in);

//1.创建Socket对象，和服务端建立连接

        Socket socket = new Socket("192.168.8.235",12345);
        DataInputStream dis = null;
        DataOutputStream dos = null;

        //2.发送城市名称
        boolean falg = true;
        while (falg) {

        dos = new DataOutputStream(socket.getOutputStream());
        String clientMessageString = in.next();
        dos.writeUTF(clientMessageString);

        //System.out.println("请求查询天气: 北京");



        //3.接受返回结果使用输入流

        dis = new DataInputStream(socket.getInputStream());

        String result = dis.readUTF();

        System.out.println(result);

        if ("exit".equals(clientMessageString)) {
          //4.关闭流

          dis.close();

          dos.close();
          falg = false;
        }
  }

}
}

3.Server类的内容

package web_service;

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

public class WeatherServer {
public static void main(String[] args) throws IOException{
final Scanner in = new Scanner(System.in);

// 1.创建ServerSocket对象

ServerSocket serverSocket = new ServerSocket(12345);

while(true){

// 2.等待客户端连接，阻塞的方法

final Socket socket = serverSocket.accept();

Runnable runnable = new Runnable(){

@Override

public void run(){

     try{
      boolean falg = true;
      DataInputStream dis = null;
            DataOutputStream dos = null;
      while (falg) {

       dis = new DataInputStream(socket.getInputStream());

       String cityName = dis.readUTF();

       System.out.println(cityName);






       // 4.根据城市名查询天气

       String result = in.next();

       System.out.println(result);



       // 5.返回查询结果，使用输出流。

       dos = new DataOutputStream(socket.getOutputStream());

       dos.writeUTF(result);

       if ("exit".equals(cityName)) {
        // 6.关闭流
        System.out.println(cityName);
        dis.close();

        dos.close();
        falg = false;
       }
      }

// 3.使用输入流接受客户端发送的请求

}catch(Exception e){

e.printStackTrace();

}

};

//启动线程

new Thread(runnable).start();

}

}
}

4.先运行Server 再运行Client 客户端像服务端发送消息，服务端接受消息，也可以回复客户端。当客户端输入exit 客户端停止运行。

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