在Servlet中使用JSP Bean [英] Using JSP Bean in a Servlet

问题描述

所以我在JSP页面上使用bean来存储一些数据，就像这样:

So I'm using a bean on a JSP page to store some data, like so:

<jsp:useBean id="data" class="myclass" scope="session" />

以后是否可以在同一会话中从servlet访问此bean?

Is there anyway to access this bean from a servlet at a later time in the same session?

显然，当我加载jsp页面和servlet时，我没有访问相同的会话.我正在打印会话ID，这给我两个页面一个不同的值，所以我无法访问Bean.有什么想法吗?

Apparently I'm not accessing the same session when I load the jsp page and the servlet. I'm printing out the session ID and it's giving me a different value for both pages, so I can't access the bean. Any ideas?

推荐答案

是的，您可以通过id作为键从会话中获取它作为属性.

Yes, you can obtain it as attribute from the session by the id as key.

Data data = (Data) request.getSession().getAttribute("data");

请注意，您需要将类放入包中，否则无法导入它.您还想给它一个比myclass更合理的名称.

Note that you need to put classes in a package, else you cannot import it. You'd also like to give it a more sensible name than myclass.

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