Spring MVC-什么是网址路径信息？

Question

I would like to know what is a url path info?

For example in

http://myserver:8080/servletname/handlermethod

Is it the whole path including server name:

http://myserver:8080/servletname/handlermethod

or is it just

/servletname/handlermethod

Answer 1

getPathInfo() according to the doc:

Returns any extra path information associated with the URL the client sent when it made this request. The extra path information follows the servlet path but precedes the query string and will start with a "/" character.

so in your example it will return /handlermethod

If you want to have /servletname/handlermethod you should use getRequestURI() .

getRequestURL() will return the full URL made by the client (except string parameters).

Answer 2

The path info in Spring MVC may imply for the info sent via a URL. In a Spring MVC Controller you can easily set a request mapping which include a variable value place holder which is bound to an argument with @PathVariable annotation in the method signature - related to the request mapping. For eaxmple:

  @RequestMapping(value = "/user/{userId}")  
public ModelAndView getUserByPathVariable(@PathVariable Long userId, HttpServletRequest request,  HttpServletResponse response) { 
        System.out.println("Got request param: " + userId);

You take a look here for a more detailed example: Spring MVC Controller Example