javax.servlet.http.httpServletRequest接口

HttpServletRequest接口中常用的方法：

- String getContentPath();//获取webapp根目录路径，如下图：

下面研究request到底是一个怎样的范围？

所以说：request.setAttribute和request.getAttribute 这两个方法必须在一个http请求中使用，那么，如果有两个方法，第一个方法存值，第二个方法取值，怎么办呢？答案就是把这两个方法放到一个http请求里面，需要用到RequestDispatche getRequestDispatcher(string path)这个方法。如下

以上是转发到/b方法里面。/b方法里面就能获取到userObj对象了。

转载于:https://www.cnblogs.com/suanshun/p/6679079.html

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