jdbcapplet.java

来自「有关java的源程序,为讲授java程序设计课程使用」· Java 代码 · 共 98 行

import java.awt.event.*;
import java.rmi.*;
import java.net.*;
import java.io.*;
import java.applet.*;
import java.awt.*;


public class JdbcApplet extends Applet implements MouseListener
{
	Rem remObject;
	Button SqlSelectButton,SqlUpdateButton;
	public void init()
	{
//首先查找RMI 服务器对象再执行其他任务
		try
		 {
   		   remObject=(Rem)Naming.lookup("rmi://"+getCodeBase().getHost()+"/Rem");
		 }
		 catch(RemoteException re)
		 {
			System.out.println("RemoteException:"+re);
		 }
 		 catch(NotBoundException nbe)
		 {
			System.out.println("NotBoundException:"+nbe);
		 }
		 catch(MalformedURLException mfe)
		 {
			System.out.println("MalformedURLException:"+mfe);
		 }

    	Panel upPanel=new Panel();
    	SqlSelectButton=new Button("SQL Select DB"); 
		SqlSelectButton.addMouseListener(this);
		SqlUpdateButton=new Button("Sql Update DB"); 
		SqlUpdateButton.addMouseListener(this);
		
		upPanel.add(SqlSelectButton);
		upPanel.add(SqlUpdateButton);
		add(upPanel,"North");
	}
	public void paint(Graphics g)
	{

	}
	public void mousePressed(MouseEvent evt)
	{
	}
	public void mouseReleased(MouseEvent evt)
	{
	}
	public void mouseEntered(MouseEvent evt)
	{
	}
	public void mouseExited(MouseEvent evt)
	{
	}
	public void mouseClicked(MouseEvent evt)
	{
		if(evt.getSource()==this)    //Clicked at My Applet ?
			{
			}
		else if(evt.getSource()==SqlSelectButton)    //Clicked at Sql Select Button ?
			{
				StatementExecSQLSelect();
			
			}
		else if(evt.getSource()==SqlUpdateButton)    //Clicked at Sql Update Button ?
			{
				StatementExecSQLUpdateDBRecord();
			}
	}

	public void StatementExecSQLSelect()
	{
		try
		 {
	       remObject.StatementExecSQLSelect();
		 }
	     catch(RemoteException re)
		 {
			System.out.println("RemoteException:"+re);
		 }

	}
	public void StatementExecSQLUpdateDBRecord()
	{
		try
		 {
	       remObject.StatementExecSQLUpdateDBRecord();
		 }
	     catch(RemoteException re)
		 {
			System.out.println("RemoteException:"+re);
		 }
	}
}