server.java

一个复数的网络运算设计,用JAVA写的,我的毕业设计

package CalculateProgram;

import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
class Server extends JFrame{

	ServerSocket serverSock;
	Socket sock;
	JTextArea t1 = new JTextArea();
	DataOutputStream out;
	DataInputStream in;	  
    String name;
    public Server(){
    	try{
    		serverSock = new ServerSocket(6003);
    	}
    	catch(IOException e){
    		JOptionPane.showMessageDialog(null,"服务器启动失败!");
    		return;
    	}
    	JScrollPane jsp = new JScrollPane(t1);
    	this.getContentPane().add(jsp,"Center");
    	JPanel p1 = new JPanel();
    	this.getContentPane().add(p1,"South");
    	setTitle("服务器");
    	setSize(340,200);
    	setVisible(true); 
        try{
        	sock = serverSock.accept();
        	out = new DataOutputStream(sock.getOutputStream());
        	in = new DataInputStream(sock.getInputStream());
        	out.writeUTF("你连接服务器成功");
        	Communion2 th = new Communion2(this);
        	th.start();
        }
        catch(Exception e){}
    	addWindowListener(new WindowAdapter(){
    		 public void windowClosing(WindowEvent e){
    		 	try{
    		 		out.writeUTF("bye");
    		 	}
    		 	catch(Exception ee){}
    		 	dispose();
    		 	System.exit(0);
    		 }		
    	});    	
    }
    class Communion2 extends Thread{  
    	Server server;
    	Communion2(Server server){
    		this.server = server;
    	}
    	public void run(){
    		String msg = null;
    		double result;
    		while(true){
    			try{
    				msg = server.in.readUTF();
    			    server.t1.append("客户说:"+msg+"\n");
    			    result = calculate(msg);
    			    out.writeUTF(String.valueOf(result));
    			}
    			catch(Exception e){
    				break;
    			}
    		}
    		try{
    			server.out.close();
    			server.in.close();
    			server.sock.close();
    			server.serverSock.close();
    		}
    		catch(Exception e){}
    	}
    	public double calculate(String message){
    		String[] str = message.split(",");
    		double num1 = Double.parseDouble(str[0]);
    		double num2 = Double.parseDouble(str[1]);
    		if(str[2].equals("+")){
    			return num1+num2;
    		}else if(str[2].equals("-")){
    			return num1-num2;
    		}else if(str[2].equals("*")){
    			return num1*num2;
    		}else{
    			return num1/num2;
    		}
    	}
    }
    public static void main(String[] args) {
    	Server mainFrame = new Server();
    }
}