在JSP应用中，Servlet一般用于负责业务逻辑处理，而JSP用于显示处理结果。因此，我们必须掌握如何将Servlet的处理结果传递给JSP的方法。根据数据使用的周期和范围，可以选择将数据存储到JSP的内建对象Request、Session或Application中。但要注意的是，存放在Request对象中的数据只能应用在一个请求范围内；存在Session对象中的数据可以应用在一个会话期间；而在Application中的数据则可以应用在整个应用范围内。-Application in JSP, Servlet generally responsible for handling business logic, while the JSP used to display the results. Therefore, we must learn how to deal with the results passed to the Servlet' s JSP method. According to the data using the period and scope, you can choose the data stored in the built-in objects JSP Request, Session or Application in the. But note that the Request object stored in the data can only be applied in the context of a request　exist in the Session object can be applied to the data during a session　in Application data can be applied to the entire application range.