javabean链接access的问题！

我连不起在和web-inf同一目录的 bookshop下面的 bookshop.mdb,配了数据源或者用绝对路径也不行，但是我用java 和JSP 放在bookshop下面连就能连起来了，有哪为兄弟能指点一下吗？代码如下：

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package com.qifengbookshop;

import java.sql.*;

public class coonDB {

public coonDB(){

Connection coon = null;

Statement stat = null;

ResultSet rs = null;

String url = "sun.jdbc.odbc.JdbcOdbcDriver";

String sql = null;

try{

Class.forName (url);

}catch(ClassNotFoundException e){

e.printStackTrace();

}

try{

coon = DriverManager.getConnection("jdbc:odbc:bookshop");

stat = coon.createStatement();

//rs = stat.executeQuery(sql);

}catch(SQLException e){

e.printStackTrace();

}finally {

try{

if(rs!=null){