CODEWITHSUNDEEP
javaspringspring-mvcintellij-ideaspring-boot
user2025303
user2025303

Reputation:

Usage of @Componenscan in Springboot Spring MVC Application

my problem is that i dont know how to specify the path for my Controller package to search for requestmapping annotations inside it in the @componenscan annotation, which is in the main class.

Project structure: enter image description here

My DemoApplication class:

package com.personalitymeet;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Configuration
@EnableAutoConfiguration
@ComponentScan()
@Controller
public class DemoApplication {

@ResponseBody
@RequestMapping("/")
String entry(){
    return "bla";
}
public static void main(String[] args) {
    SpringApplication.run(DemoApplication.class, args);
}
}

Usercontroller.java:

package com.personalitymeet.web;

import com.personalitymeet.domain.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * Created by mv on 15.09.2016.
 */

@Controller
public class UserController {

    @RequestMapping("/user")
    public String user(Model model){
        User user = new User();
        user.setFirstname("Misi");
        user.setLastname("Varga");
        model.addAttribute("user",user);
        return "userview";
    }

}

So, my question is, how can i tell springboots that it should search for @Requestmapping annotation in the Usercontroller class?

Upvotes: 0

Views: 965

Answers (3)

Bob Lukens
Bob Lukens

Reputation: 720

Can you replace this code:

@Configuration
@EnableAutoConfiguration
@ComponentScan()
@Controller
public class DemoApplication {
...

With this code:

@SpringBootApplication
@Controller
public class DemoApplication {
...

Configure your application to expose the management endpoints:

http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#production-ready

and then hit this endpoint to see the endpoint exposed by the application:

http://localhost:[port]/manage/mappings

Also, I recommend to create a separate controller for the root to keep your startup class uncluttered with application logic.

Upvotes: 0

chrylis -cautiouslyoptimistic-
chrylis -cautiouslyoptimistic-

Reputation: 77167

Your problem isn't the @ComponentScan, which will search in com.personalitymeet and all subpackages. It's that for some reason you don't have the MVC infrastructure activating.

You should have spring-boot-starter-web as a dependency in your build.gradle file, and you should add @EnableWebMvc to your configuration class.

Upvotes: 0

Vimal Bera
Vimal Bera

Reputation: 10497

You can specify component scan to your configuration file to scan folder com.personalitymeet and it will automatically pick all the classes which has relevant annotations.

Below are basic 3 annotations needed to init application.

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.personalitymeet")

Upvotes: 1

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