Spring Service 실습

service 패키지 생성 후 PostService 클래스 생성

 

package com.eom.controllerexercise.service;

import com.eom.controllerexercise.dto.PostDto;
import org.springframework.stereotype.Service;

@Service
public class PostService {

    public PostDto getPost(Integer id) {
        System.out.println("find post data from database by" + id);
        System.out.println("validate dataa from database");
        System.out.println("process data if necessary");

        return new PostDto(id, "title", "this is content", "hjeom");
    }
}

 

PostController 클래스 변경

package com.eom.controllerexercise.controller;

import com.eom.controllerexercise.dto.PostDto;
import com.eom.controllerexercise.service.PostService;
import org.springframework.web.bind.annotation.*;

import static org.springframework.web.bind.annotation.RequestMethod.*;

@RestController
@RequestMapping(value = "/post")
public class PostController {

    PostService postService = new PostService();

    @GetMapping
    // getPost Method는 postservice를 호출해서 받은 postdto result 값을 반환을 한다.
    public PostDto getPost(@RequestParam Integer id) {
        PostDto result = postService.getPost(id);
        return result;
    }

    @PostMapping
    public String savePost(@RequestBody PostDto postDto) {
        System.out.println(postDto.getId());
        System.out.println(postDto.getTitle());
        System.out.println(postDto.getContent());
        System.out.println(postDto.getUsername());

        return "POST /post";
    }

    @PutMapping
    public String updatePost() {
        return "PUT /post";
    }

    @DeleteMapping
    public String deletePost() {
        return "DELETE /post";
    }
}