test1.java

一个JAVA的C/S信息系统

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.applet.*;
import java.io.*;
 public class Test1 extends Applet implements ActionListener{
  Panel p1,p2,p3,p4; Label lb1,lb2,lb3;TextField tf1,tf2;Button bt1,bt2,bt3;
   URL url;
       Socket socket;
	DataInputStream in;
	DataOutputStream out;
   	URL url1,url2,url3;
 String s;
  public void init(){
     Color c1=new Color(233,233,233);
	  s="http://127.0.0.1/Example2.html";
	   setBackground(c1);
	 p1=new Panel();p2=new Panel();p3=new Panel();p4=new Panel();
	 lb1=new Label("会员登陆"); lb2=new Label("会员:"); lb3=new Label("密码:");
	 tf1=new TextField(20);tf2=new TextField(20); tf2.setEchoChar('*');
	 bt1=new Button("确 定");bt2=new Button("取 消");bt3=new Button("注 册");
	 p1.setBackground(Color.lightGray);tf1.setBackground(Color.lightGray);tf2.setBackground(Color.lightGray);
	bt1.setBackground(Color.lightGray);bt2.setBackground(Color.lightGray);bt3.setBackground(Color.lightGray);
	 setLayout(null);
	 add(p1);p1.setBounds(200,200,377,29);
	 add(p2);p2.setBounds(200,231,377,29);
	 add(p3);p3.setBounds(200,260,377,30);
	 add(p4);p4.setBounds(200,290,377,30);
	 p1.add(lb1);
	 p2.add(lb2);p2.add(tf1);
	 p3.add(lb3);p3.add(tf2);
	 p4.add(bt1);p4.add(bt2);p4.add(bt3);
	 bt1.addActionListener(this);
	  bt2.addActionListener(this);
	   bt3.addActionListener(this);
  }
  public void actionPerformed(ActionEvent e)
  {if(e.getSource()==bt3)
   {try
    {url=new URL(s);
    }
    catch(MalformedURLException g)
         { //tf1.setText("不正确的URL:"+url);
         }
       getAppletContext().showDocument(url);
	   }
   else if(e.getSource()==bt2)
   {tf1.setText("");tf2.setText("");}
   else if(e.getSource()==bt1)
   {String s1=null,s2=null,s3=null,s4=null;
	int flag=0;
	s3=tf1.getText();s4=tf1.getText();
try{   socket=new Socket("127.0.0.1",4567);
      in=new DataInputStream(socket.getInputStream());
	  out=new DataOutputStream(socket.getOutputStream());
	  out.writeUTF("denglu");
	  System.out.println("发送了信息:denglu");
	  }
	  catch(IOException e1){System.out.println("Error:start"+e1);}
	 try
       	{
   		out.writeUTF(s3);
		out.writeUTF(s4);
		System.out.println("发送了以下信息:"+s3+"  ,  "+s4);
		}
		catch(IOException e2){System.out.println("erro:__"+e2);}
		while(true)
	       {			
		    try
	           {
				s1=in.readUTF();
		        System.out.println(s1);
	           }
		       catch(IOException e1){}
	        if(s1!=null)break;		  			            
	       }
if(s1.equals("yes"))flag=1;	
if(flag==0)
   {
    try
	   {
     	url1=new URL("http://127.0.0.1/Example4.html");
       }
       catch(MalformedURLException e1){}
     getAppletContext().showDocument(url1);
  } 
   else {try
		    {
     	  	 url3=new URL("http://127.0.0.1/SwingApplet.html");
     	  	}
        	catch(MalformedURLException e3){}
     	    getAppletContext().showDocument(url3);
            }
	   }
   } 
public void paint(Graphics g) {
		g.drawRect(199,199,378,121); g.drawLine(200,230,577,230);
                            	}
 }
 //<applet code=Test1.class width=777 height=600></applet>