为什么只有当控制器请求映射注释中存在一个级别的URL路径时，Spring才会解析视图

Question

I am implementing a website with Spring MVC and I've noticed the following problem. I have a controller like this one

/**
 * Created by adelin.ghanayem@cayetanogaming.com on 4/7/15.
 */
@Controller
@RequestMapping(value = "/")
public class UserControlPanelController {

    // this url has a second level. /user/panel
    @RequestMapping(value = "/user/panel",method = RequestMethod.GET)
    @Secured(value = {"ROLE_USER"})
    public ModelAndView mainPage(){
         return new ModelAndView("user-panel.jsp");
    }
}

The view user-panel.jsp is not resolver I receive

HTTP ERROR 404

Problem accessing /myapp/user/login-user.jsp. Reason:

    /myapp/user/login-user.jsp

However, when I map the method to @RequestMapping(value = "/user",method = RequestMethod.GET)

The view is resolved. The jsp page is placed at the root of the webapp (web directory )

Now when I tried to map the method to @RequestMapping(value = "/user/panel",method = RequestMethod.GET) and return new ModelAndView("/user-panel.jsp"); NOTE THE ROOT SLASH. The view resolved properly.

Answer 1

You need to specify a view resolver in your configuration so spring knows where to look for the views. If you do not provide one, you must specify the path to the file, which is why the "user-panel.jsp" does not work, but the "/user-panel.jsp" does work.