访问Access数据库mdb文件时报错
java.sql.SQLException: [Microsoft][ODBC 驱动程序管理器] 未发现数据源名称并且未指定默认驱动程序
at sun.jdbc.odbc.JdbcOdbc.createSQLException(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.standardError(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcConnection.initialize(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at ConnAccessDB.main(ConnAccessDB.java:13)
下面是代码，文件位置肯定是对的，求大侠帮忙...help me

String url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)}; DBQ=C:\\ESS_part001.mdb";

		String sql = "select id,ordernr,typenr,erpnr,description1,note from tblPart where producttopgroup=1";

		Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

		Connection conn = DriverManager.getConnection(url);

		if(conn != null){

			PreparedStatement ps = conn.prepareStatement(sql);

			ResultSet rs = ps.executeQuery();

			while(rs.next())

			{

				System.out.print(rs.getString("id")+"  ");

				System.out.print(rs.getString("ordernr"));

				System.out.println();

			}

		}

在线等 ，急呀 谢谢