[TIL] 2022-12-09(30day)

Spring API 만들기

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👉 Controller

package com.sparta.hhblog.controller;

import com.sparta.hhblog.dto.PostCreateDto;
import com.sparta.hhblog.dto.PostEditDto;
import com.sparta.hhblog.dto.PostListDto;
import com.sparta.hhblog.dto.PostShowDto;
import com.sparta.hhblog.entity.Blog;
import com.sparta.hhblog.service.BlogService;
import lombok.RequiredArgsConstructor;
import org.springframework.web.bind.annotation.*;

import java.util.List;


@RestController
@RequiredArgsConstructor
public class BlogController {

    private final BlogService blogService;


//    @PostMapping("/api/blogs")
//    public Blog createPost(@RequestBody PostCreateDto postCreateDto){
//        return blogService.createPost(postCreateDto);
//    }
    // RequestBody를 사용해서 postman으로 값을 넘기는게 어렵습니다 ㅠㅠ

    @PostMapping("/api/createPost/{username}/{pw}/{subject}/{contents}")
    public PostCreateDto createPost(@PathVariable String username, @PathVariable String pw, @PathVariable String subject, @PathVariable String contents){
        return blogService.createPost(username,pw,subject,contents);
    }

    @GetMapping("/api/showPost/{id}")
    public PostShowDto showPost(@PathVariable Long id){
        return blogService.showPost(id);
    }

    @GetMapping("/api/showAllPost")
    public List<PostListDto> getPosts(){
        return blogService.getPosts();
    }


    @PutMapping("/api/editPost/{id}/{pw}/{subject}/{contents}")
    public PostEditDto editPost(@PathVariable Long id, @PathVariable String pw, @PathVariable String subject, @PathVariable String contents){

        return blogService.editPost(id, pw, subject, contents);
    }

    @DeleteMapping("/api/deletePost/{id}/{pw}")
    public String deletePost(@PathVariable Long id,@PathVariable String pw){
        return blogService.deletePost(id,pw);
    }






}

 

👉 DTO

package com.sparta.hhblog.dto;

import com.sparta.hhblog.entity.Blog;

public class PostCreateDto {

    private String contents;

    public PostCreateDto(Blog blog) {
        this.contents = blog.getContents();
    }
}

package com.sparta.hhblog.dto;

import com.sparta.hhblog.entity.Blog;
import lombok.Getter;

@Getter
public class PostEditDto {
    private String username;
    private String subject;
    private String contents;



    public PostEditDto(Blog blog) {

        this.username = blog.getUsername();
        this.subject = blog.getSubject();
        this.contents = blog.getContents();
    }

}

package com.sparta.hhblog.dto;

import com.sparta.hhblog.entity.Blog;
import lombok.Getter;

import java.time.LocalDateTime;
import java.util.List;

@Getter
public class PostListDto {

    private String username;
    private String subject;
    private String contents;
    private LocalDateTime createdAt;



    public PostListDto(Blog blog) {
        this.username = blog.getUsername();
        this.subject = blog.getSubject();
        this.contents = blog.getContents();
        this.createdAt = blog.getCreatedAt();
    }



}

package com.sparta.hhblog.dto;

import com.sparta.hhblog.entity.Blog;
import lombok.Getter;

import java.time.LocalDateTime;
@Getter
public class PostShowDto {

    private String username;
    private String subject;
    private String contents;
    private LocalDateTime createdAt;


    public PostShowDto(Blog blog) {
        this.username = blog.getUsername();
        this.createdAt = blog.getCreatedAt();
        this.subject = blog.getSubject();
        this.contents = blog.getContents();
    }


}

 

 

👉 Entity

package com.sparta.hhblog.entity;

import com.sparta.hhblog.dto.PostCreateDto;
import lombok.Getter;
import lombok.NoArgsConstructor;

import javax.persistence.*;

@Getter
@Entity
@NoArgsConstructor
public class Blog extends Timestamped{

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(nullable = false)
    private String username;

    @Column(nullable = false)
    private String pw;

    @Column(nullable = false)
    private String subject;

    @Column(nullable = false)
    private String contents;

    public Blog(String username, String pw, String subject, String contents) {
        this.username = username;
        this.pw = pw;
        this.subject = subject;
        this.contents = contents;
    }

//    public Blog(PostCreateDto postCreateDto) {
//        this.username = username;
//        this.pw = pw;
//        this.subject = subject;
//        this.contents = contents;
//    }

    public void edit(String subject, String contents) {

        this.subject = subject;
        this.contents = contents;
    }
}

package com.sparta.hhblog.entity;

import lombok.Getter;
import org.springframework.data.annotation.CreatedDate;
import org.springframework.data.annotation.LastModifiedDate;
import org.springframework.data.jpa.domain.support.AuditingEntityListener;

import javax.persistence.EntityListeners;
import javax.persistence.MappedSuperclass;
import java.time.LocalDateTime;

@Getter
@MappedSuperclass
@EntityListeners(AuditingEntityListener.class)
public class Timestamped {

    @CreatedDate
    private LocalDateTime createdAt;

    @LastModifiedDate
    private LocalDateTime modifiedAt;
}

 

👉 Repository

package com.sparta.hhblog.repository;

import com.sparta.hhblog.entity.Blog;
import org.springframework.data.jpa.repository.JpaRepository;

import java.util.List;

public interface BlogRepository extends JpaRepository<Blog,Long> {
    List<Blog> findAllByOrderByModifiedAtDesc();

}

👉 Service

package com.sparta.hhblog.service;

import com.sparta.hhblog.dto.PostCreateDto;
import com.sparta.hhblog.dto.PostEditDto;
import com.sparta.hhblog.dto.PostListDto;
import com.sparta.hhblog.dto.PostShowDto;
import com.sparta.hhblog.entity.Blog;
import com.sparta.hhblog.repository.BlogRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;

import javax.transaction.Transactional;
import java.util.ArrayList;
import java.util.List;

@Service
@RequiredArgsConstructor
public class BlogService {

    private final BlogRepository blogRepository;


//    @Transactional
//    public Blog createPost(PostCreateDto postCreateDto) {
//        Blog blog = new Blog(postCreateDto);
//        blogRepository.save(blog);
//
//        return blog;
//    }

    @Transactional
    public PostCreateDto createPost(String username, String pw, String subject, String contents) {
        Blog blog = new Blog(username, pw, subject, contents);
        blogRepository.save(blog);

        PostCreateDto postCreateDto = new PostCreateDto(blog);
        return postCreateDto;
    }

    @Transactional
    public PostShowDto showPost(Long id) {

        Blog blog = blogRepository.findById(id).orElseThrow(
                () -> new IllegalArgumentException("아이디가 존재하지 않습니다.")
        );

        PostShowDto postShowDto = new PostShowDto(blog);

        return postShowDto;
    }

    @Transactional
    public List<PostListDto> getPosts() {

        List<Blog> blog = blogRepository.findAll();
        List<PostListDto> allPosts = new ArrayList<>();

        for (Blog blogs : blog) {

            PostListDto postListDTO = new PostListDto(blogs);
            allPosts.add(postListDTO);
        }

        return allPosts;
    }

    @Transactional
    public PostEditDto editPost(Long id, String pw, String subject, String contents) {

        Blog blog = blogRepository.findById(id).orElseThrow(
                () -> new IllegalArgumentException("아이디가 존재하지 않습니다.")
        );

        if (blog.getPw().equals(pw)) {
            blog.edit(subject, contents);
            PostEditDto postEditDto = new PostEditDto(blog);
            return postEditDto;
        } else {
            throw new IllegalArgumentException("비밀번호가 일치하지 않습니다");
        }
    }

    @Transactional
    public String deletePost(Long id, String pw) {
        Blog blog = blogRepository.findById(id).orElseThrow(
                () -> new IllegalArgumentException("아이디가 존재하지 않습니다.")
        );

        if (blog.getPw().equals(pw)) {
            blogRepository.deleteById(id);
            return "정상적으로 삭제되었습니다.";
        }

        return "비밀번호가 일치하지 않습니다.";

    }
}

 

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🙋‍♂️ 소감 : 

url에는 유의미한 정보만 담겨야 하는데,

나는 모두 PathVariable로 사용해서 url에 모두 노출된다 ㅎㅎ;

RequestBody로 생성과, 수정 부분은 다시 수정해야겠다.

😈 아는 내용이라고 그냥 넘어가지 않기! 😈