banji.java

学籍管理系统,可以实现多方面学生学籍的管理

/*
 * Created on 2005-12-9
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */

/**
 * @author lyqaiyz1
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
import java.net.*;
import java.io.*;
import java.sql.*;
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.util.StringTokenizer;
public class banJi extends Applet implements Runnable,ActionListener
{  
	
     TextField txt_no;  
     TextField txt_name; 
     TextField txt_master;
     
      Label lab_no;
	  Label lab_name;
	  Label lab_master;
	  
	  Button btn_add=new Button();
	  Button btn_del=new Button();
	  Button btn_update=new Button();
	  Button btn_find=new Button();
	  Label tishi;
	  Label xianshi;
	  
	  Socket socket=null;
	  DataInputStream in=null;
	  DataOutputStream out=null;
	  Thread thread; 

	  
	public void init()
	{
		  txt_no=new TextField(10);		 
		  txt_name=new TextField(10);	
		  txt_master=new TextField(10);	
		  
		  lab_no=new Label("班级科目",Label.CENTER);
		  lab_name=new Label("班级名字",Label.CENTER);
		  lab_master=new Label("班主任",Label.CENTER);
		  
		  btn_add=new Button("添加");
		  btn_del=new Button("删除");
		  btn_update=new Button("修改");
		  btn_find=new Button("查找");
		  
		  tishi=new Label("正在连接到服务器,请稍等...",Label.CENTER);
		  tishi.setForeground(Color.red);
		  tishi.setFont(new Font("TimesRoman",Font.BOLD,24));
		  xianshi=new Label("提  示   结   果                 ");
		  
		  Panel box1=new Panel();  
		  Panel box2=new Panel();  
		  Panel box3=new Panel();
		  Panel box4=new Panel();
		  Panel box5=new Panel();
		  Panel box6=new Panel();
		  
		  box1.add(tishi);
		  box2.add(lab_no);
		  box2.add(txt_no);
		  box3.add(lab_name);
		  box3.add(txt_name);
		  box4.add(lab_master);
		  box4.add(txt_master);
		  box5.add(xianshi);
		  box6.add(btn_add);
		  box6.add(btn_del);
		  box6.add(btn_update);
		  box6.add(btn_find);
		  
		  
		  add(tishi);
		  add(box1);
		  add(box2);
		  add(box3); 
		  add(box4);
		  add(box5);
		  add(box6);

		  btn_add.addActionListener(this);
		  btn_del.addActionListener(this);
		  btn_update.addActionListener(this);
		  btn_find.addActionListener(this);

		}
	public void start(){
		if(socket!=null&&in!=null&&out!=null)
      {  try
            {
              socket.close();
              in.close(); 
              out.close();
            }
        catch(Exception ee)
            {
            }
      }
   try
      {
        socket=new Socket(this.getCodeBase().getHost(), 6670);
        in=new DataInputStream(socket.getInputStream());
        out=new DataOutputStream(socket.getOutputStream());
      }
   catch (IOException ee)
      { 
       tishi.setText("连接失败");
      }
   if(socket!=null)
      {
        InetAddress address=socket.getInetAddress();
        tishi.setText("连接:"+address+"成功");
      } 
   if(thread==null)
      {
        thread=new Thread(this);
        thread.start();
      }
		}
	public void run(){
		String panduan,str1=null,str2=null,str3=null;
		String s=null;
	    while(true)
	     { 
	       try{
	             s=in.readUTF();
	            
	          }
	        catch (IOException e)
	          {
	            tishi.setText("与服务器已断开");
	            break;
	          }
	        
	        StringTokenizer fenxi=new StringTokenizer(s,",");
            if(fenxi.hasMoreTokens())
             { 
            	panduan=fenxi.nextToken(); 
             }
            if(fenxi.hasMoreTokens())
            { 
            	str1=fenxi.nextToken(); 
            }
            if(fenxi.hasMoreTokens())
            { 
            	str2=fenxi.nextToken(); 
            }
            //----------------------------
          if (str1.equals("classFind"))
          {
          	
              txt_name.setText(str1);
              txt_master.setText(str2);
          }
            //----------------------------
            
	    xianshi.setText(s);
	    }
	   
		}
	public void actionPerformed(ActionEvent e)
	 {
		if(e.getSource()==btn_add)
	     { 
	       String s1="",s2="",s3="",s4="classAdd";
	       String tianjia=btn_add.getLabel();//有写的
	      
	       s1=txt_no.getText();
	       s2=txt_name.getText();
	       s3=txt_master.getText();

	      
	       String str=s4+","+s1+","+s2+","+s3;      
	       if(str.length()>0)		      
	        { 
	          try{
	              out.writeUTF(str);
	             }
	          catch(IOException e1)
	             {
	              tishi.setText("与服务器已断开");
	             } 
	        } 
	       else
	        {
	       	xianshi.setText("请填写");
	        }              
	       
	     }
		//--------------- 删除----------------------
		if(e.getSource()==btn_del)
	     { 
	       String s1="",s2="",s3="",s4="classDel";
	      // String tianjia=btn_del.getLabel();//有写的
	      
	       s1=txt_no.getText();
	       s2=txt_name.getText();
	       s3=txt_master.getText();

	      
	       String str=s4+","+s1+","+s2+","+s3;      
	       if(str.length()>0)		      
	        { 
	          try{
	              out.writeUTF(str);
	             }
	          catch(IOException e1)
	             {
	              tishi.setText("与服务器已断开");
	             } 
	        } 
	       else
	        {
	       	xianshi.setText("请填写");
	        }              
	       
	     }
		//------------修改-------------
		if(e.getSource()==btn_update)
	     { 
	       String s1="",s2="",s3="",s4="classUpdate";
	      // String tianjia=btn_del.getLabel();//有写的
	      
	       s1=txt_no.getText();
	       s2=txt_name.getText();
	       s3=txt_master.getText();

	      
	       String str=s4+","+s1+","+s2+","+s3;      
	       if(str.length()>0)		      
	        { 
	          try{
	              out.writeUTF(str);
	             }
	          catch(IOException e1)
	             {
	              tishi.setText("与服务器已断开");
	             } 
	        } 
	       else
	        {
	       	xianshi.setText("请填写信息");
	        }              
	       
	     }
		//--------------查找-------------
		if(e.getSource()==btn_find)
	     { 
	       String s1="",s2="",s3="",s4="classFind";
	      // String tianjia=btn_del.getLabel();//有写的
	      
	       s1=txt_no.getText();
	       s2=txt_name.getText();
	       s3=txt_master.getText();
	      
	       String str=s4+","+s1+","+s2+","+s3;      
	       if(str.length()>0)		      
	        { 
	          try{
	              out.writeUTF(str);
	             }
	          catch(IOException e1)
	             {
	              tishi.setText("与服务器已断开");
	             } 
	        } 
	       else
	        {
	       	xianshi.setText("请填写信息");
	        }              
	       
	     }
		//--------------------------------
	 }

}