使用自定义标签库在视图根中构造组件树。

Using custom tag libraries to construct the component tree in the view root.

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JSP和自定义标签库。

JSP and custom tag library.

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把其中的数据访问组件设计成自定义标签库，方便了访问数据库的代码编写和维护。

Designing the database-access component in user-defined Tag Library to make it is easy to code and maintain program which need to access and operation database.

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