songclient.java

用J2EE的ＥＪＢ基于容器bean写的一个音乐网站

import java.util.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
import javax.ejb.*;
import java.sql.*;
public class SongClient
{
	private String iSong_id,cSong_name,iArtist_code,cLink;

    SongHome home;
    Song remote;
	public String getiSong_code()
	{
		return iSong_id;	
	}	
	public String getcSong_name()
	{
		return cSong_name;	
	}
	public String getiArtist_code()
	{
	   return iArtist_code;	
	}
	 public String getcLink()
	{
		return cLink;	
	}	
    
    public void setiSong_id(String iSong_id)
    {
       this.iSong_id=iSong_id;	
    }	
    public void setcSong_name(String cSong_name)
	{
		this.cSong_name=cSong_name;	
	}
	public void setiArtist_code(String iArtist_code)
	{
		this.iArtist_code=iArtist_code;
	}
	
	public void setcLink(String cLink)
	{
	    this.cLink=cLink;	
	}
	
	public SongClient()throws SQLException
	{
		try
		{
			Context init=new InitialContext();
			Object obj=init.lookup("Song");
			home=(SongHome)PortableRemoteObject.narrow(obj,SongHome.class);
		}
		catch(Exception e)
		{
			throw new SQLException(e.toString());	
		}	
	}
	
	public String createEvent()throws SQLException
	{
		String Message="";
		try
		{
			remote=home.create(iSong_id,cSong_name,iArtist_code,cLink);
			Message="the Song has created";
				
		}
		catch(DuplicateKeyException dupex)
		{
			Message="the code"+iSong_id+"  has been in the DataBase";
			System.out.println(dupex.toString());
		}
		catch(Exception e)
		{
			System.out.println(e.toString());	
		}
		return Message;	
		
		
	}
		public String updateEvent()
	{
		String Message="";
		try
		{
			remote=home.findByPrimaryKey(iSong_id);
			remote.updateSong(iSong_id,cSong_name,iArtist_code,cLink);
			Message="Successful!you have updated the song details.";
		}
		catch(Exception e)
		{
			Message="Modify Failed";
			System.out.println(e.toString());
		}
		return Message;	
	}
	public String deleteEvent()
	{
		String Message="";
		try
		{
			remote=home.findByPrimaryKey(iSong_id);
			remote.remove();
			Message="Delete Successfully!";
		}
		catch(Exception e)
		{
			Message="Cannot find the code!";
			System.out.println(e.toString());
			
			
		}	
		return Message;
	}
	public Vector findEvent()
	{
	   String Message="";
	   Vector v=new Vector();
	   try
	   {   
	       remote=home.findByPrimaryKey(iSong_id);
	       String st=remote.getSongid();
	       String str=remote.getSongname();
	       String stri=remote.getArtistcode();
	       String strin=remote.getSonglink();
	       v.addElement(st);
	       v.addElement(str);
	       v.addElement(stri);
	       v.addElement(strin);
	       Message="Result by searching ID";
	       	
	   }
	   catch(Exception e)
	   {
	   	  Message="invalid ID,please check your ID";
	   	  
	      System.out.println(e.toString());	
	   }	
	   return v;	
	}
	
	

}