36. 스프링 MVC - 컨트롤러 통합

`@RequestMapping` 을 잘 보면 클래스 단위가 아니라 메서드 단위에 적용된 것을 확인할 수 있다. 따라서 컨트롤러 클
래스를 유연하게 하나로 통합할 수 있다

 

 

SpringMemberControllerV2**

package hello.servlet.web.springmvc.v2;

import hello.servlet.domain.member.Member;
import hello.servlet.domain.member.MemberRepository;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;

/**
* 클래스 단위 -> 메서드 단위
* @RequestMapping 클래스 레벨과 메서드 레벨 조합
*/

@Controller
@RequestMapping("/springmvc/v2/members")
public class SpringMemberControllerV2 {

    private MemberRepository memberRepository = MemberRepository.getInstance();
    @RequestMapping("/new-form")
        public ModelAndView newForm() {
        return new ModelAndView("new-form");
    }
    
    @RequestMapping("/save")
    public ModelAndView save(HttpServletRequest request, HttpServletResponse
    response) {
        String username = request.getParameter("username");
        int age = Integer.parseInt(request.getParameter("age"));
        Member member = new Member(username, age);
        memberRepository.save(member);
        ModelAndView mav = new ModelAndView("save-result");
        mav.addObject("member", member);
        return mav;
    }
    
    @RequestMapping
    public ModelAndView members() {
        List<Member> members = memberRepository.findAll();
        ModelAndView mav = new ModelAndView("members");
        mav.addObject("members", members);
        return mav;
    }
}

조합
컨트롤러 클래스를 통합하는 것을 넘어서 조합도 가능하다.
다음 코드는 `/springmvc/v2/members` 라는 부분에 중복이 있다.

• `@RequestMapping("/springmvc/v2/members/new-form")`
• `@RequestMapping("/springmvc/v2/members")`
• `@RequestMapping("/springmvc/v2/members/save")`

물론 이렇게 사용해도 되지만, 컨트롤러를 통합한 예제 코드를 보면 중복을 어떻게 제거했는지 확인할 수 있다.
클래스 레벨에 다음과 같이 `@RequestMapping` 을 두면 메서드 레벨과 조합이 된다.

@Controller
@RequestMapping("/springmvc/v2/members")
public class SpringMemberControllerV2 {}

 

조합 결과

• 클래스 레벨 @RequestMapping("/springmvc/v2/members")`
  
  • 메서드 레벨 @RequestMapping("/new-form")` `/springmvc/v2/members/new-form
  • 메서드 레벨 @RequestMapping("/save")` `/springmvc/v2/members/save
  • 메서드 레벨 @RequestMapping` `/springmvc/v2/members
• 실행
  
  • 등록: http://localhost:8080/springmvc/v2/members/new-form
  • 목록: http://localhost:8080/springmvc/v2/members