网格计算如今变得越来越流行，但这并不意味着它是易于使用，部署和开发的。 OGSA-DAI是一款能够在网格中开发和管理数据库的中间件。我们目前所做的工作是用SUN公司JDBC接口的一个应用来扩展OGSA-DAI的网格中间件，使用Java语言来访问数据库。本次应用使用OGSA的代客户端API ，目的是提供一种简单而众所周知的方法，使新的和现有的开发人员及应用程序能够在网格中使用OGSA-DAI中间件来操作数据库。

Grid computing is becoming more and more popular nowadays， but it does not mean that it is becoming easy to use，deploy and program．OGSA-DAI is a middleware capable of exposing and managing databases on the grid． In this work we present an extension to the OGSA-DAI grid middleware，this extension is an implementation of the Sun JDBC interface，used to access databases within the java language．This implementation uses the OGSA-DAI client API．With this work we aim to provide an easy and well known way to enable new and existing developers，and applications to use databases exposed in the grid using the OGSA-DAI middleware．