用JSP写的一个在线购物网站的代码

				package shop.data;
				
				import java.sql.*;
				
				public class conn{
					
					String dbdriver = "sun.jdbc.odbc.JdbcOdbcDriver";
					String url = "JDBC:ODBC:shop";
					Connection conn = null;
				    ResultSet rs = null;
					
					public conn(){
						
						try{
							
							Class.forName(dbdriver);
							}
						catch(java.lang.ClassNotFoundException e){}	
						}
						
					public ResultSet executeQuery(String sql){
						
						rs = null;
						try{
							conn = DriverManager.getConnection(url,"sa","");
							Statement com = conn.createStatement(java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE,java.sql.ResultSet.CONCUR_READ_ONLY);
							rs = com.executeQuery(sql);
							}
						catch(SQLException ex){ System.out.println(sql); }
						
						return rs;	
						}	
					}