web获取URL相关信息

http://www.xxx.com/project/path/user.do?param=1111 

springMVC中返回如下   

  request.getRequestURL()：返回http://www.xxx.com/project/path/user.do    

  request.getRequestURI()： 返回/project/path/user.do    

  request.getServletPath()：  返回/path/user.do   

  request.getQueryString()： 返回param=1111