以编程方式包含 JSP 页面
我需要在 Tag 类中包含一个 JSP 页面。我相信使用 API 将 JSP 页面包含在另一个 JSP 页面中的标准方法是这样的：
request.getRequestDispatcher("included.jsp").include(request, response);
但是，我注意到包含的页面呈现在生成页面的顶部，无论代码位于何处。无论代码是放置在 Tag 类中还是直接作为 scriptlet 放置在 JSP 文件中，都是如此。另一方面，
如何在类中包含 JSP 页面，使其行为与
I need to include a JSP page in a Tag class. I believe the standard way to include a JSP page within another JSP page using API is this:
request.getRequestDispatcher("included.jsp").include(request, response);
However, I noticed that the included page is rendered at the top of the generated page, no matter where the code is located. This is true whether the code is placed in a Tag class or directly in the JSP file as scriptlet. On the other hand, the <jsp:include> action works as expected, rendering the included page where the tag appears in the JSP file.
How do I include a JSP page in a class so that it behaves the same as the <jsp:include>? There's no way to invoke the <jsp:include> action within a Tag class, is there?
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也许您的标记类应该在调用
request.getRequestDispatcher("included.jsp").include(request, response);之前调用pageContext.getOut().flush();>Perhaps your tag class should call
pageContext.getOut().flush();prior to callingrequest.getRequestDispatcher("included.jsp").include(request, response);我讨厌偷懒，但为什么不直接看一个 JSP 编译文件呢？例如，tomcat 将它们编译到 \work，您可以在那里查看它生成的 java。
I hate to be lazy, but why not just look at a JSP compiled file. for example, tomcat compiles these to \work, and you can VIEW the java it produced there.