在JSP中使用JavaBeans连接数据库

针对动态网站频繁地从数据库中取得数据、与数据库建立连接时耗费服务器资源与时间的问题，给出了在JSP(Javaserver pages)中使用Java Beans连接数据库的方法。该方法利用Bean建立数据库连接，并将Bean对象存入session中，响应HttpsessjonBindingEvent事件，且利用valueUnbound方法，在session对象中止时，执行关闭数据库连接对象的善后工作。讨论了将对象分别存入page、session、appliction中的差异，证明了在JSP中使用Bean既可以简化JSP网页结构，又可以保证系统的安全性和提高系统的执行效率。

Using JavaBeans to connect database in JSP

A method of setting up database connection is given by using JavaBeans in JSP(Java server pages) to solve such problems as wasting server source and long consuming time for the dynamic web site's obtaining data from database frequently. This method uses Bean to set up database connection,saves the Bean object in session ,respond the HttpSessionBindingEvent event, and uses valueUnbound method to close the Bean object of database connection while ending session. The diffrence of the Bean object in page,in session and in application is discussed.The result shows that the use of Bean in JSP can simplify the structure of JSP pages, ensure the security of system,and improve the executive efficiency.