server.java

java 网络编程的东西

/*
 * Server.java
 *
 * Created on 2007年9月13日, 上午8:09
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package serversocket;
import java.io.*;
import java.net.*;
/**
 *
 * @author 王鹏
 */
public class Server {
public static void main ( String[]args ){
  while (true){
      try{
        ServerSocket server = new ServerSocket(5678);//创建一个服务器端口号为5678
        Socket client= server.accept();//建立一个客户叫client它可以接受服务器所发送的数据
        BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));//从客户端读取数据的对象IN
	PrintWriter out = new PrintWriter(client.getOutputStream());//向客户端输出的对象OUT
        String str=in.readLine();
        double d1=Double.parseDouble(str);
                str=in.readLine();
        double d2=Double.parseDouble(str);
                str=in.readLine();
       if (str.equals("+"))
           out.println(""+(d1+d2));
       if(str.equals("-"))
            out.println(""+(d1-d2));
       if (str.equals("*"))
           out.println(""+(d1*d2));
       if (str.equals("/"))
           out.println(""+(d1/d2));
              out.flush();
              client.close();
              server.close();
          }
      catch(Exception e)
      {
          e.printStackTrace();
          break;
      }
                }
        }
}