Spring - TO DO (1)

 

- TodoListController.java

package org.zerock.jdbcex1.controller;

import lombok.extern.log4j.Log4j2;
import org.zerock.jdbcex1.dto.TodoDTO;
import org.zerock.jdbcex1.service.TodoService;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@WebServlet(name = "todoListController", value="/todo/list")
@Log4j2
public class TodoListController extends HttpServlet {

    private TodoService todoService = TodoService.INSTANCE;

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        log.info("todo list..................");

        try {
            List<TodoDTO> dtoList = todoService.listAll();
            req.setAttribute("dtoList", dtoList);
            req.getRequestDispatcher("/WEB-INF/todo/list.jsp").forward(req,resp);
        } catch (Exception e) {
            log.error(e.getMessage());
            throw new ServletException("list error");
        }
    }
}

1. /todo/list로 요청이 들어온다.

2. TodoService라는 객체를 열거형 INSTANCE를 이용해서 싱글톤으로 생성한다.

3. log.info를 통해 log를 찍어낸다.

 

- TodoService.java

package org.zerock.jdbcex1.service;

import lombok.extern.log4j.Log4j2;
import org.modelmapper.ModelMapper;
import org.zerock.jdbcex1.dao.TodoDAO;
import org.zerock.jdbcex1.domain.TodoVO;
import org.zerock.jdbcex1.dto.TodoDTO;
import org.zerock.jdbcex1.util.MapperUtil;

import java.util.List;
import java.util.stream.Collectors;

@Log4j2
public enum TodoService {
    INSTANCE;

    private TodoDAO dao;
    private ModelMapper modelMapper;

    TodoService() {
        dao = new TodoDAO();
        modelMapper = MapperUtil.INSTANCE.get();
    }

    public void register(TodoDTO todoDTO) throws Exception {

        TodoVO todoVO = modelMapper.map(todoDTO, TodoVO.class);

//        System.out.println("todoVO : " + todoVO);
        log.info(todoVO);

        dao.insert(todoVO); // int를 반환하므로 이를 이용해서 예외처리도 가능
    }

    public List<TodoDTO> listAll() throws Exception {
        List<TodoVO> voList = dao.selectAll();

        log.info("voList.....................");
        log.info(voList);

        List<TodoDTO> dtoList = voList.stream()
                .map(vo->modelMapper.map(vo,TodoDTO.class))
                .collect(Collectors.toList());

        return dtoList;
    }

    public TodoDTO get(Long tno) throws Exception {
        log.info("tno : " + tno);
        TodoVO todoVO = dao.selectOne(tno);
        TodoDTO todoDTO = modelMapper.map(todoVO, TodoDTO.class);
        return todoDTO;
    }

    public void remove(Long tno) throws Exception {
        log.info("tno : " + tno);
        dao.deleteOne(tno);
    }

    public void modify(TodoDTO todoDTO) throws Exception {
        log.info("todoDTO : " + todoDTO);

        TodoVO todoVO = modelMapper.map(todoDTO, TodoVO.class);

        dao.updateOne(todoVO);
    }
}

4. 컬렉션 List를 통해 todoService.listAll() 메서드를 호출한다.

5. listAll() 메서드는 DTO에 있는 객체를 VO로 옮긴다.

 

- TodoVO

package org.zerock.jdbcex1.domain;

import lombok.*;

import java.time.LocalDate;

@Getter
@Builder
@ToString
@AllArgsConstructor
@NoArgsConstructor
public class TodoVO {
    private Long tno;
    private String title;
    private LocalDate dueDate;
    private boolean finished;
}