假定你的web application 名称为news,你在浏览器中输入请求路径:

http://localhost:8080/news/main/list.jsp

则执行下面向行代码后打印出如下结果:

1、System.out.println(request.getContextPath());
打印结果:/news


2、System.out.println(request.getServletPath());
打印结果:/main/list.jsp


3、System.out.println(request.getRequestURI());
打印结果:/news/main/list.jsp


4、System.out.println(request.getRealPath("/")); 
打印结果: F:\Tomcat 6.0\webapps\news\test

怀有希望!!