[KOSTA] Spring 기반 Cloud 서비스 개발자 양성 과정 53일차 - MVC 패턴

📃 MVC (Model, View, Controller) 로 웹 구성하기

Board.java - 객체

package kosta.model;

import java.io.Serializable;

public class Board implements Serializable {
	private int seq;
	private String title;
	private String writer;
	private String contents;
	private String regdate;
	private int hitcount;
	
	public Board() {
		
	}
	
	public Board(int seq, String title, String writer, String contents, String regdate, int hitcount) {
		super();
		this.seq = seq;
		this.title = title;
		this.writer = writer;
		this.contents = contents;
		this.regdate = regdate;
		this.hitcount = hitcount;
	}

	public int getSeq() {
		return seq;
	}

	public void setSeq(int seq) {
		this.seq = seq;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public String getWriter() {
		return writer;
	}

	public void setWriter(String writer) {
		this.writer = writer;
	}

	public String getContents() {
		return contents;
	}

	public void setContents(String contents) {
		this.contents = contents;
	}

	public String getRegdate() {
		return regdate;
	}

	public void setRegdate(String regdate) {
		this.regdate = regdate;
	}

	public int getHitcount() {
		return hitcount;
	}

	public void setHitcount(int hitcount) {
		this.hitcount = hitcount;
	}

	@Override
	public String toString() {
		return "Board [seq=" + seq + ", title=" + title + ", writer=" + writer + ", contents=" + contents + ", regdate="
				+ regdate + ", hitcount=" + hitcount + "]";
	}
	
	
}

BoardDao.java

public class BoardDao2 {
	private static BoardDao2 dao = new BoardDao2();
	
	public static BoardDao2 getInstance() {
		return dao;
	}
	
	public SqlSessionFactory getSqlSessionFactory() {
		//mybatis-config.xml => SqlSessionFactory 변환
		String resource = "mybatis-config.xml";
		InputStream in = null;
		
		try {
			in = Resources.getResourceAsStream(resource);
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		return new SqlSessionFactoryBuilder().build(in);
	}
	
	
	
	public int insertBoard(Board board) {
		SqlSession sqlSession = getSqlSessionFactory().openSession();
		int re = -1;
		
		try {
			//re = sqlSession.insert("kosta.mapper.BoardMapper.insertBoard", board);
			re = sqlSession.getMapper(BoardMapper.class).insertBoard(board);
			if(re>0) {
				sqlSession.commit();
			}else {
				sqlSession.rollback();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			if(sqlSession != null) {
				sqlSession.close();
			}
		}
		
		return re;
	}
	
	public List<Board> listBoard(){
		SqlSession sqlSession = getSqlSessionFactory().openSession();
		List<Board> list = null;
		
		try {
			//list = sqlSession.selectList("kosta.mapper.BoardMapper.listBoard");
			list = sqlSession.getMapper(BoardMapper.class).listBoard();
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			if(sqlSession != null) {
				sqlSession.close();
			}
		}
		return list;
	}
	
	public Board detailBoard(int seq) {
		SqlSession sqlSession = getSqlSessionFactory().openSession();
		Board board = null;
		
		try {
			board = sqlSession.getMapper(BoardMapper.class).detailBoard(seq);
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			if(sqlSession != null) {
				sqlSession.close();
			}
		}
		return board;
	}

BoardService.java

package kosta.service;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import kosta.model.Board;
import kosta.model.BoardDao2;

public class BoardService {
	private static BoardService service = new BoardService();
	private static BoardDao2 dao;
	
	public static BoardService getInstance() {
		dao = BoardDao2.getInstance();
		return service;
	}
	
	public int insertBoardService(HttpServletRequest request)throws Exception {
		request.setCharacterEncoding("utf-8");
		Board board = new Board();
		board.setTitle(request.getParameter("title"));
		board.setWriter(request.getParameter("writer"));
		board.setContents(request.getParameter("contents"));
		
		return dao.insertBoard(board);
	}
	
	public List<Board> listBoardService(HttpServletRequest request)throws Exception{
		List<Board> list = dao.listBoard();
		
		return list;
	}
	
	public Board detailBoard(int seq)throws Exception {
		
		return dao.detailBoard(seq);
	}
}

Controller.java

package kosta.controller;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
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 kosta.action.Action;
import kosta.action.ActionForward;
import kosta.action.DetailAction;
import kosta.action.InsertAction;
import kosta.action.InsertFormAction;
import kosta.action.ListAction;

@WebServlet("/board/*")
public class MyController extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    public MyController() {
        super();
    }
    
    public void doProcess(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException  {
    	//url 식별
    	String requestURI = request.getRequestURI();  // /MVC/board/list.do
    	String contextPath = request.getContextPath();
    	String command = requestURI.substring(contextPath.length()+7);
    	System.out.println(command);
    	
    	Action action = null;
    	ActionForward forward = null;
    	
    	if(command.equals("insertForm.do")) {
    		action = new InsertFormAction();
    		try {
				forward = action.execute(request, response);
			} catch (Exception e) {
				e.printStackTrace();
			}
    		
    	}else if(command.equals("insertAction.do")) {
    		action = new InsertAction();
    		try {
				forward = action.execute(request, response);
			} catch (Exception e) {
				e.printStackTrace();
			}
    		
    	}else if(command.equals("listAction.do")) {
    		action = new ListAction();
    		try {
				forward = action.execute(request, response);
			} catch (Exception e) {
				e.printStackTrace();
			}
    	}else if(command.equals("detailAction.do")) {
    		action = new DetailAction();
    		try {
				forward = action.execute(request, response);
			} catch (Exception e) {
				e.printStackTrace();
			}
    	}
    	
    	if(forward != null) {
    		if(forward.isRedirect()) { //redirect
    			response.sendRedirect(forward.getPath());
    		}else { //Dispatcher
    			RequestDispatcher dispatcher = request.getRequestDispatcher(forward.getPath());
    			dispatcher.forward(request, response);
    		}
    	}
    }

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doProcess(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doProcess(request, response);
	}

}