favoritedao.java

这个程序是花了好几十万请人开发的

/**
 * @author 郑文金
 *这个类定义的是 我的收藏表的数据库访问对象
 * 
 * 
 */
package javabean;
import java.sql.*;
import java.util.Vector;
public class Favoritedao 
{
	public Connection con=null;
	private ResultSet rs;
	private Statement sql;
	private ConnectionPool pool;
	public Favoritedao(Connection con) throws SQLException 
	{
		this.con=con;			
	}
	
	public ResultSet query(String s) throws SQLException
	{
		try
		{			
			Statement sql = con.createStatement();
			rs=sql.executeQuery(s);	
		}
		catch(SQLException e)
		{
			System.err.println(e.getMessage());
		}
		return rs;
		
	}	
	
	public void update(String s)
	{
		try
		{			
			Statement sql =con.createStatement();
			sql.executeUpdate(s);	
		}
		catch(SQLException e)
		{
			System.err.println(e.getMessage());
		}
	
	}	
	
	
	public Vector query(int code,int pagesize,String str)
	{
		int count=pagesize;
		Vector vec=new Vector();
		try{
			sql=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
			rs=sql.executeQuery(str);
			rs.absolute((code-1)*pagesize+1);
			while(count>0)
			{
				Favorite favorite=new Favorite();
				String name=rs.getString("NAME");
				if(name.length()>50)
					name=name.substring(0,50)+"...";
				favorite.setID(rs.getInt("ID"));
				favorite.setUUID(rs.getString("UUID"));
				favorite.setKIND(rs.getString("KIND"));	
				favorite.setNAME(name);		   								
				vec.add(favorite);
				count--;
				if(!rs.next())
					break;
			}
			if(rs!=null)
				rs.close();
		}
		catch(SQLException e){return null;}
		return vec;
	}
	

}