35 스프링 MVC - 컨트롤러 통합

@RequestMapping을 잘 보면 클래스 단위가 아니라 메서드 단위에 적용된 것을 확인할 수 있다.

따라서 컨트롤러 클래스를 유연하게 하나로 통합할 수 있다. 

 

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;

@Controller
public class SpringMemberControllerV2 {

    private MemberRepository memberRepository = MemberRepository.getInstance();

    @RequestMapping("/springmvc/v2/members/new-form")
    public ModelAndView newForm(){
        return new ModelAndView("new-form");
    }

    @RequestMapping("/springmvc/v2/members")
    public ModelAndView members() {
        List<Member> members = memberRepository.findAll();
        ModelAndView mv = new ModelAndView("members");
        mv.addObject("members",members);

        return mv;
    }

    @RequestMapping("/springmvc/v2/members/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 mv = new ModelAndView("save-result");
        mv.addObject("member",member);
        return mv;
    }
}

기존에 3개로 나눠졌던 클래스를 하나로 통합했다.

@RequestMapping은 메서드 단위에 적용하기 때문에 가능하다.

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;

@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
    public ModelAndView members() {
        List<Member> members = memberRepository.findAll();
        ModelAndView mv = new ModelAndView("members");
        mv.addObject("members",members);

        return mv;
    }

    @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 mv = new ModelAndView("save-result");
        mv.addObject("member",member);
        return mv;
    }
}

메서드 3개 모두 @RequestMapping에 중복되는 부분이 있었다.

이것을 클래스 레벨의 @RequestMapping에 입력하면 

클래스 + 메서드의 조합이 가능하게 된다.