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DTO 설정과 서비스 계층 만들기

생성일

2025/01/24 05:52

태그

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dto 생성

package org.zerock.apiserver.dto;

import jakarta.persistence.Column;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.time.LocalDate;

@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
public class TodoDTO {
    private Long tno;
    private String title;
    private String content;
    private boolean complete;
    private LocalDate dueDate;
}
Java
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service

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인터페이스 상에 entity → dto 로 dto → entity로 변환하는 코드 작성

package org.zerock.apiserver.service;

import org.springframework.transaction.annotation.Transactional;
import org.zerock.apiserver.domain.Todo;
import org.zerock.apiserver.dto.TodoDTO;

@Transactional
public interface TodoService {
    TodoDTO get(Long tno);

    default TodoDTO entityToDTO(Todo todo) {
        return TodoDTO.builder()
                .tno(todo.getTno())
                .title(todo.getTitle())
                .content(todo.getContent())
                .complete(todo.isComplete())
                .dueDate(todo.getDueDate())
                .build();
    }

    default Todo dtoToEntity(TodoDTO todoDTO) {
        return Todo.builder()
                .tno(todoDTO.getTno())
                .title(todoDTO.getTitle())
                .content(todoDTO.getContent())
                .complete(todoDTO.isComplete())
                .dueDate(todoDTO.getDueDate())
                .build();
    }

}
Java
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serviceimpl

package org.zerock.apiserver.service;

import lombok.RequiredArgsConstructor;
import lombok.extern.log4j.Log4j2;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.zerock.apiserver.domain.Todo;
import org.zerock.apiserver.dto.TodoDTO;
import org.zerock.apiserver.repository.TodoRepository;

import java.util.Optional;

@Service
@Log4j2
@RequiredArgsConstructor
public class TodoServiceImpl implements TodoService {

    private final TodoRepository todoRepository;

    @Override
    public TodoDTO get(Long tno) {
        Optional<Todo> result = todoRepository.findById(tno);
        Todo todo = result.orElseThrow();
        return entityToDTO(todo);
    }
}
Java
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테스트 코드 작성

package org.zerock.apiserver.service;

import lombok.extern.log4j.Log4j2;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
@Log4j2
public class TodoServiceTests {

    @Autowired
    TodoService todoService;

    @Test
    public void testGet() {
        Long tno = 50L;
        log.info(todoService.get(tno));
    }
}
Java
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// 테스트 결과
Hibernate: select t1_0.tno,t1_0.complete,t1_0.content,t1_0.due_date,t1_0.title from tbl_todo t1_0 where t1_0.tno=?
2024-08-29T20:29:44.737+09:00  INFO 12809 --- [           main] o.z.apiserver.service.TodoServiceTests   : TodoDTO(tno=50, title=Title..48, content=Content......48, complete=false, dueDate=2024-08-28)
Java
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