如何从JSP页面中捕获最终的HTML输出，但在将其显示给用户之前？

I need to capture the HTML and do some post processing on the HTML data before it is finally output to the user. The final HTML document is actually composed of many JSP includes (12 or so), so there is some existing logic actually in the JSP. But I need the HTML that is generated. This has to be done on the server-side.I need to capture the HTML and do some post pro