• Model(대부분 java): DB에서 추출이나 수정하여 Controller
• View (대부분 JSP파일): 화면,UI
• Controller: 요청을 담당
  
  

Model 1 : (JSP)view+controller

• 시간이 없을 때, 만드는 게 급선무: 10년전, 요즘 잘 사용하지 않음
  
  

Model 2 : M + V + C

• 모듈화: 부품화
• 개발하면 할 수록 모듈화가 중요

전체적인 컴퍼넌트 설계

1. Front Controller에서 먼저 받는다
2. 특정 커맨드 호출
3. 커맨드가 DAO에 적합한 메서드 호출
4. 결과물: DTO 형태
5.

게시판 만들기

DataBase 생성

Front Controller 만들기

		/*
        http://localhost:8080/Book/example.do라는
        request가 들어왔다고 가정할 때
        */
		
		//command: 어떤 로직을 수행할 것 인가
		BCommand command = null;
		
		String uri = request.getRequestURI();// /Book/example.do
		String conPath = request.getContextPath();//  /Book
        
        //conPath.length만큼 짤라내서 뒷부부의 확장자명을 얻는다
		String com = uri.substring(conPath.length()); // /example.do
		

package com.javalec.ex.frontcontroller;

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 com.javalec.ex.command.BCommand;
import com.javalec.ex.command.BContentCommand;
import com.javalec.ex.command.BDeleteCommand;
import com.javalec.ex.command.BListCommand;
import com.javalec.ex.command.BModifyCommand;
import com.javalec.ex.command.BReplyCommand;
import com.javalec.ex.command.BReplyViewCommand;
import com.javalec.ex.command.BWriteCommand;

//확장자명으로 url mapping
@WebServlet("*.do")

// public class BFrontController extends HttpServlet: 서블릿  > 기본으로 doGet doPost를 가진다
public class BFrontController extends HttpServlet {
	private static final long serialVersionUID = 1L;
     
	
    public BFrontController() {
        super();

    }

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

		System.out.println("doGet");
		actionDo(request, response);
	}



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

		System.out.println("doPost");
		actionDo(request, response);
	}
	
	private void actionDo(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		System.out.println("actionDo");
		
		request.setCharacterEncoding("EUC-KR");
		
		
		//viewPage: 요청을 받은 다음 보여줄 페이지
		String viewPage = null;
		
		//command: 어떤 로직을 수행할 것 인가
		BCommand command = null;
		
		String uri = request.getRequestURI();
		String conPath = request.getContextPath();
		
		//conPath.length만큼 짤라내서 뒷부부의 확장자명을 얻는다
		String com = uri.substring(conPath.length());
		
		
		// 얻은 확장자명에 따라서 아래를 수행
		if(com.equals("/write_view.do")) {
			viewPage = "write_view.jsp";
		} else if(com.equals("/write.do")) {
			command = new BWriteCommand();
			command.execute(request, response);
			viewPage = "list.do";
		} else if(com.equals("/list.do")) {
			command = new BListCommand();
			command.execute(request, response);
			viewPage = "list.jsp";
		} else if(com.equals("/content_view.do")){
			command = new BContentCommand();
			command.execute(request, response);
			viewPage = "content_view.jsp";
		} else if(com.equals("/modify.do")) {
			command = new BModifyCommand();
			command.execute(request, response);
			viewPage = "list.do";
		} else if(com.equals("/delete.do")) {
			command = new BDeleteCommand();
			command.execute(request, response);
			viewPage = "list.do";
		} else if(com.equals("/reply_view.do")) {
			command = new BReplyViewCommand();
			command.execute(request, response);
			viewPage = "reply_view.jsp";
		} else if(com.equals("/reply.do")) {
			command = new BReplyCommand();
			command.execute(request, response);
			viewPage = "list.do";
		}
		
		RequestDispatcher dispatcher = request.getRequestDispatcher(viewPage);
		dispatcher.forward(request, response);
		
	}

}

Command 만들기

• BCommand.java: 인터페이스로 request, response를 인자로 두고 다른 Command들이 override 하도록 한다 >> request, response 수행하는 로직은 각자 알아서

package com.javalec.ex.command;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public interface BCommand {
	
	void execute(HttpServletRequest request, HttpServletResponse response);
	// 파라미터 2: request, response >>> 다른 Command 클래스에서 override
}

• BContentCommand

package com.javalec.ex.command;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.javalec.ex.dao.BDao;
import com.javalec.ex.dto.BDto;

public class BContentCommand implements BCommand {

	@Override
	public void execute(HttpServletRequest request, HttpServletResponse response) {
		// TODO Auto-generated method stub

		String bId = request.getParameter("bId");
		BDao dao = new BDao();
		BDto dto = dao.contentView(bId);
		
		request.setAttribute("content_view", dto);
		
	}

}

• BDeleteCommand

package com.javalec.ex.command;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.javalec.ex.dao.BDao;

public class BDeleteCommand implements BCommand {

	@Override
	public void execute(HttpServletRequest request, HttpServletResponse response) {
		// TODO Auto-generated method stub
		
		String bId = request.getParameter("bId");
		BDao dao = new BDao();
		dao.delete(bId);
		
	}

}

DTO(Data Transfer Object)

• DB의 데이터를 자바 객체로 사용할 수 있게

package com.javalec.ex.dto;

import java.sql.Timestamp;

public class BDto {

	int bId;
	String bName;
	String bTitle;
	String bContent;
	Timestamp bDate;
	int bHit;
	int bGroup;
	int bStep;
	int bIndent;
	
	public BDto() {
		// TODO Auto-generated constructor stub
	}
	
	public BDto(int bId, String bName, String bTitle, String bContent, Timestamp bDate, int bHit, int bGroup, int bStep, int bIndent) {
		// TODO Auto-generated constructor stub
		this.bId = bId;
		this.bName = bName;
		this.bTitle = bTitle;
		this.bContent = bContent;
		this.bDate = bDate;
		this.bHit = bHit;
		this.bGroup = bGroup;
		this.bStep = bStep;
		this.bIndent = bIndent;
	}

	public int getbId() {
		return bId;
	}

	public void setbId(int bId) {
		this.bId = bId;
	}

	public String getbName() {
		return bName;
	}

	public void setbName(String bName) {
		this.bName = bName;
	}

	public String getbTitle() {
		return bTitle;
	}

	public void setbTitle(String bTitle) {
		this.bTitle = bTitle;
	}

	public String getbContent() {
		return bContent;
	}

	public void setbContent(String bContent) {
		this.bContent = bContent;
	}

	public Timestamp getbDate() {
		return bDate;
	}

	public void setbDate(Timestamp bDate) {
		this.bDate = bDate;
	}

	public int getbHit() {
		return bHit;
	}

	public void setbHit(int bHit) {
		this.bHit = bHit;
	}

	public int getbGroup() {
		return bGroup;
	}

	public void setbGroup(int bGroup) {
		this.bGroup = bGroup;
	}

	public int getbStep() {
		return bStep;
	}

	public void setbStep(int bStep) {
		this.bStep = bStep;
	}

	public int getbIndent() {
		return bIndent;
	}

	public void setbIndent(int bIndent) {
		this.bIndent = bIndent;
	}
	
}

DAO(Data Access Object)

view 페이지 만들기

글 목록 페이지 만들기(Read)

글 내용 보기 페이지 만들기(Read)

글 내용 수정 페이지 만들기(Update)

글 삭제 페이지 만들기(Delete)

• 회원 인증 절차 생략됨

글 답변 달기

• 그룹넘버: 원글과 답변글을 모두 묶어서(원글이 3이면 답변 1,2,3...도 3의 값을 가진다)
• 스텝: 원글에서 시작해서 답변이 몇번째 아래로 달리 것 인가.
• 인덴트: 얼마만큼 안으로 들여써서 표기할 것인가