本文介绍了Java访问数据库的原理及其存在的问题，提出了解决办法－数据库连接池，并对其关键问题进行了分析，构建了一个简便易用的连接池并结合当前热门技术Servlet说明了其如何在开发时使用。-This paper introduces the principles of Java to access the database and its existing problems, propose a solution- database connection pool, and its analysis of key issues, build an easy-to-use connection pooling in combination with the current popular technology shows its Servlet How to use in the development.