HttpServletRequest request 相关方法 得到路径

/* --------------------------POST------------->
http://192.168.1.211:8080/demo/index.jsp
username=qqqq
password=wwww
[email protected]
发送请求！ */
request.getMethod()	=POST
request.getContextPath()	=/demo
request.getRequestURI()	=/demo/reg
request.getRequestURL()	=http://192.168.1.211:8080/demo/reg
request.getServletPath()	=/reg

/* http://192.168.1.211:8080/demo/index.jsp?username=1&password=1&email=1 */
//-----------------------GET------------------->
request.getMethod()	=GET
request.getContextPath()	=/demo
request.getQueryString()	=username=1&password=1&email=1
request.getRequestURI()	=/demo/index.jsp
request.getRequestURL()	=http://192.168.1.211:8080/demo/index.jsp
request.getServletPath()	=/index.jsp