Spring controller doesn't work with mapping-CodePudding

I'm trying to run a simple Spring application but it's impossible.

I have this controller:

@Controller("home")
public class Home {

    @RequestMapping("/showHome")
    public String showHome(){
        return "index";
    }
}

This is ViewResolver:

@Bean
public ViewResolver viewResolver() {
   InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
   viewResolver.setPrefix("/WEB-INF/view/");
   viewResolver.setSuffix(".jsp");

   return viewResolver;
}

When I run this program like that I'm getting 404 not found and URL is: http://localhost:8080/E-CommerceFinal-1.0-SNAPSHOT/

But, when I change my controller class and method like this:

@Controller
public class Home {

   @RequestMapping("/")
   public String showHome(){
       return "index";
   }
}

My index page works.

CodePudding user response：

In your first version, @Controller("home") all it does is set home as the Home bean name, nothing else. The important thing is @RequestMapping("/showHome"). With this, you are saying that your showHome() method will be available at http://localhost:8080/E-CommerceFinal-1.0-SNAPSHOT/showHome.

In your second version, you are using @RequestMapping("/") which sets no additional path and that is why http://localhost:8080/E-CommerceFinal-1.0-SNAPSHOT/ works.

CodePudding user response：

If you are trying to set the path for ALL of the endpoints to begin with "home" you would need

@Controller
@RequestMapping("/home")
public class Home {
 @RequestMapping("/showHome")
    public String showHome(){
        return "index";
    }
...
 @RequestMapping("/someOtherEndpoint")
    public String someOtherEndpoint(){
}

}

The above would be available at http://localhost:8080/E-CommerceFinal-1.0-SNAPSHOT/home/showHome and http://localhost:8080/E-CommerceFinal-1.0-SNAPSHOT/home/someOtherEndpoint

Otherwise, as someone mentioned, you're just setting the name of the bean itself, and then using the "/" path that you declared on the showHome endpoint.