2012-5-16 MVC를 이용한 게시판 만들기[실습]

* controller

package board.controller;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import board.dto.ForwardDTO;

public class BoardFrontController extends HttpServlet {
 private static final long serialVersionUID = 1L;

    public BoardFrontController() {
        super();
    
    }

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

 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  //1. 공통 사전 작업 - 한글처리
  request.setCharacterEncoding("utf-8");
  //2. Controller 로직 처리 - Controller객체.execute()호출
  String command = request.getParameter("command");
  
  Controller ctr = ControllerCommandMapping.getController(command);
  ForwardDTO fdto = ctr.execute(request, response);
  
  //3. 공통 사후 작업
  if(fdto.isRedirect()){
   response.sendRedirect(fdto.getUrl());
  }else{
   RequestDispatcher rdp = request.getRequestDispatcher(fdto.getUrl());
   rdp.forward(request, response);
  }
 }

}

 

package board.controller;

import java.io.IOException;

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

import board.dto.ForwardDTO;

public interface Controller {
 public ForwardDTO execute(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException;
}

 

package board.controller;

import board.model.service.BoardService;

public class ControllerCommandMapping {

 public static Controller getController(String command){
  Controller ctr = null;
  if(command.equals("write")){
   ctr = new WriteContentController();
  }
  return ctr;
 }

}

 

package board.controller;

import java.io.IOException;
import java.sql.SQLException;

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

import board.dto.BoardDTO;
import board.dto.ForwardDTO;
import board.model.dao.BoardDAO;
import board.model.service.BoardService;
import board.util.Utilities;

public class WriteContentController implements Controller{

 @Override
 public ForwardDTO execute(HttpServletRequest request,
   HttpServletResponse response) throws ServletException, IOException {
  String title = request.getParameter("title");
  String writer = request.getParameter("writer");
  String content = request.getParameter("content"); 
  BoardService boardService = BoardService.getInstance();
  BoardDTO bto = new BoardDTO(title, writer, content);
  ForwardDTO forwardDTO = null;
  try {
   boardService.writeContent(bto);
   bto.setWritedate(Utilities.changeDayTimeFormat(Utilities.getNow()));
   System.out.println(bto.getContent());
//   bto.setContent(Utilities.changeContentForTextArea(bto.getContent()));
   request.setAttribute("board",bto);
   forwardDTO = new ForwardDTO("/show_content.jsp",false);
  } catch (SQLException e) {
   e.printStackTrace();
   request.setAttribute("error_message", e.getMessage());
   forwardDTO = new ForwardDTO("/error.jsp",false);
  }
 
  return forwardDTO;
 }
 
}

 

* DTO

 

package board.dto;

public class BoardDTO {
 private int no;
 private String title;
 private String writer;
 private String content;
 private String writedate;
 private int viewcount;
 private int refamily;
 private int restep;
 private int relevel;
 public BoardDTO() {
  super();
 }
 
 public BoardDTO(String title, String writer, String content) {
  super();
  this.title = title;
  this.writer = writer;
  this.content = content;
 }

 public BoardDTO(int no, String title, String writer, String content,
   String writedate, int viewcount, int refamily, int restep,
   int relevel) {
  super();
  this.no = no;
  this.title = title;
  this.writer = writer;
  this.content = content;
  this.writedate = writedate;
  this.viewcount = viewcount;
  this.refamily = refamily;
  this.restep = restep;
  this.relevel = relevel;
 }
 public int getNo() {
  return no;
 }
 public void setNo(int no) {
  this.no = no;
 }
 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 getContent() {
  return content;
 }
 public void setContent(String content) {
  this.content = content;
 }
 public String getWritedate() {
  return writedate;
 }
 public void setWritedate(String writedate) {
  this.writedate = writedate;
 }
 public int getViewcount() {
  return viewcount;
 }
 public void setViewcount(int viewcount) {
  this.viewcount = viewcount;
 }
 public int getRefamily() {
  return refamily;
 }
 public void setRefamily(int refamily) {
  this.refamily = refamily;
 }
 public int getRestep() {
  return restep;
 }
 public void setRestep(int restep) {
  this.restep = restep;
 }
 public int getRelevel() {
  return relevel;
 }
 public void setRelevel(int relevel) {
  this.relevel = relevel;
 }
 @Override
 public String toString() {
  return "BoardDTO [no=" + no + ", title=" + title + ", writer=" + writer
    + ", content=" + content + ", writedate=" + writedate
    + ", viewcount=" + viewcount + ", refamily=" + refamily
    + ", restep=" + restep + ", relevel=" + relevel + "]";
 }
 @Override
 public int hashCode() {
  final int prime = 31;
  int result = 1;
  result = prime * result + ((content == null) ? 0 : content.hashCode());
  result = prime * result + no;
  result = prime * result + refamily;
  result = prime * result + relevel;
  result = prime * result + restep;
  result = prime * result + ((title == null) ? 0 : title.hashCode());
  result = prime * result + viewcount;
  result = prime * result
    + ((writedate == null) ? 0 : writedate.hashCode());
  result = prime * result + ((writer == null) ? 0 : writer.hashCode());
  return result;
 }
 @Override
 public boolean equals(Object obj) {
  if (this == obj)
   return true;
  if (obj == null)
   return false;
  if (getClass() != obj.getClass())
   return false;
  BoardDTO other = (BoardDTO) obj;
  if (content == null) {
   if (other.content != null)
    return false;
  } else if (!content.equals(other.content))
   return false;
  if (no != other.no)
   return false;
  if (refamily != other.refamily)
   return false;
  if (relevel != other.relevel)
   return false;
  if (restep != other.restep)
   return false;
  if (title == null) {
   if (other.title != null)
    return false;
  } else if (!title.equals(other.title))
   return false;
  if (viewcount != other.viewcount)
   return false;
  if (writedate == null) {
   if (other.writedate != null)
    return false;
  } else if (!writedate.equals(other.writedate))
   return false;
  if (writer == null) {
   if (other.writer != null)
    return false;
  } else if (!writer.equals(other.writer))
   return false;
  return true;
 }
 

 
}

 

package board.dto;

public class ForwardDTO {
 private String url;
 private boolean redirect; //true - 리다이렉트, false - 요청디스패치
 public ForwardDTO() {
  super();
  // TODO Auto-generated constructor stub
 }
 public ForwardDTO(String url, boolean redirect) {
  super();
  this.url = url;
  this.redirect = redirect;
 }
 public String getUrl() {
  return url;
 }
 public void setUrl(String url) {
  this.url = url;
 }
 public boolean isRedirect() {
  return redirect;
 }
 public void setRedirect(boolean redirect) {
  this.redirect = redirect;
 }
 @Override
 public String toString() {
  return "ForwardDTO [url=" + url + ", redirect=" + redirect + "]";
 }
 @Override
 public int hashCode() {
  final int prime = 31;
  int result = 1;
  result = prime * result + (redirect ? 1231 : 1237);
  result = prime * result + ((url == null) ? 0 : url.hashCode());
  return result;
 }
 @Override
 public boolean equals(Object obj) {
  if (this == obj)
   return true;
  if (obj == null)
   return false;
  if (getClass() != obj.getClass())
   return false;
  ForwardDTO other = (ForwardDTO) obj;
  if (redirect != other.redirect)
   return false;
  if (url == null) {
   if (other.url != null)
    return false;
  } else if (!url.equals(other.url))
   return false;
  return true;
 }
 
}

 

* DAO

 

package board.model.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.apache.tomcat.dbcp.dbcp.BasicDataSource;

import board.dto.BoardDTO;
import board.util.DBUtil;

public class BoardDAO {
 private static BoardDAO instance = new BoardDAO();
 private DBUtil dbUtil;
 private BoardDAO(){
  dbUtil = DBUtil.getInstance();
 }
 public static BoardDAO getInstance(){
  return instance;
 }
 public int selectBoardNo()throws SQLException{
  Connection conn = null;
  PreparedStatement pstmt = null;
  ResultSet rset = null;
  String sql = "select board_no_seq.nextval from dual";
  int no=0;
  try{
  BasicDataSource ds = dbUtil.getDataSource();
  conn = ds.getConnection();
  pstmt = conn.prepareStatement(sql);
  rset = pstmt.executeQuery();
  if(rset.next()){
   no = rset.getInt(1);
  }
  }finally{
   dbUtil.close(conn, pstmt, rset);
  }
  return no;
 }
 public void insertContent(BoardDTO bto) throws SQLException{
  Connection conn = null;
  PreparedStatement pstmt = null;
  
  String sql = "insert into board (no, title, writer, content, writedate, viewcount, refamily, restep, relevel)  values(?,?,?,?,?,?,?,?,?)";
  try{
  BasicDataSource ds = dbUtil.getDataSource();
  conn = ds.getConnection();
  pstmt = conn.prepareStatement(sql);
  pstmt.setInt(1, bto.getNo());
  pstmt.setString(2, bto.getTitle());
  pstmt.setString(3, bto.getWriter());
  pstmt.setString(4, bto.getContent());
  pstmt.setString(5, bto.getWritedate());
  pstmt.setInt(6, bto.getViewcount());
  pstmt.setInt(7, bto.getRefamily());
  pstmt.setInt(8, bto.getRestep());
  pstmt.setInt(9, bto.getRelevel());
  int cnt = pstmt.executeUpdate();
  System.out.println(cnt+"개의 행이 삽입되었습니다.");
  
  }finally{
   dbUtil.close(conn, pstmt);
  }
 }
}

 

* service

 

package board.model.service;

import java.sql.SQLException;

import board.dto.BoardDTO;
import board.model.dao.BoardDAO;
import board.util.Utilities;

public class BoardService {
 private static BoardService instance = new BoardService();
 private  BoardDAO dao;
 private BoardService(){
  dao = BoardDAO.getInstance();
 }
 public static BoardService getInstance(){
  return instance;
 }
 public void writeContent(BoardDTO bto)throws SQLException{
  int no = dao.selectBoardNo();
  bto.setNo(no);
  bto.setRefamily(no);
  bto.setRelevel(0);
  bto.setRestep(0);
  bto.setViewcount(0);
  bto.setContent(Utilities.changeContentForDB(bto.getContent()));
  String writedate = Utilities.getNow();
  bto.setWritedate(writedate);
  dao.insertContent(bto);
 }
}

 

* util

 

package board.util;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.apache.tomcat.dbcp.dbcp.BasicDataSource;
//싱글톤 패턴
public class DBUtil {
 private BasicDataSource dataSource;//객체 생성 -> 생성자
 private static DBUtil instance = new DBUtil();
 private DBUtil(){
  dataSource = new BasicDataSource();
  //프라퍼티 설정
  //1. 연결할 DB와 관련된 설정
  dataSource.setDriverClassName("oracle.jdbc.driver.OracleDriver");//BasicDataSource를 사용하면 따로 드라이버 로딩을 해줄 필요가 없다. 바로 처리가능
  dataSource.setUrl("jdbc:oracle:thin:@127.0.0.1:1521:XE");
  dataSource.setUsername("scott");
  dataSource.setPassword("tiger");
 }
 public static DBUtil getInstance(){
  return instance;
 }
 public BasicDataSource getDataSource(){
  return dataSource;
 }
 public void close(Connection conn, PreparedStatement pstmt)throws SQLException{
  if(pstmt!=null){
   pstmt.close();
  }
  if(conn!=null){
   conn.close();
  }
 }
 public void close(Connection conn, PreparedStatement pstmt, ResultSet rset)throws SQLException{
  if(rset!=null){
   rset.close();
  }
  if(pstmt!=null){
   pstmt.close();
  }
  if(conn!=null){
   conn.close();
  }
 }
}

 

package board.util;

 
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;

public class Utilities {
 //글목록에서 한페이지에 보여질 게시물의 개수
 public static final int CONTENT_PER_PAGE = 10;
 //한 페이지 그룹으로 묶을 페이지의 개수
 public static final int PAGE_PER_PAGEGROUP = 10;
 //생성자( Utilities객체의 메소드가 전부 static이어서 객체를 생성할 필요가 없어서 생성자를 private로 막았다. )
 private Utilities(){
  
 }
 /**
  * 호출된 시점의 일시를 14자리 String 값으로 만들어 return
  *  예) 20120512100524 (yyyyMMddHHmmss)
  * @return
  */
 public static String getNow(){
  
  Date date = new Date();
  SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMddHHmmss");//new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");
  
  return simpleDateFormat.format(date);
 }
 /**
  * 인수로 14자리 형태 일시를 받아 날짜만 yyyy.MM.dd 형태의 String으로 만들어 return
  * - 목록에서 작성일시를 보여줄때 사용할 메소드
  * 예) 20120512100524 -> 2012.05.12
  * @param dateTime
  * @return
  */
 public static String changeDayFormat(String dateTime){
 
  return dateTime.substring(0, 4)+"."+dateTime.substring(4, 6)+"."+dateTime.substring(6, 8);
//  SimpleDateFormat sf = new SimpleDateFormat("yyyy.MM.dd");
//  String changeDay = sf.format(dateTime); //이렇게 하면 넘어오는 dateTime이 String값이어서 실행시점에 에러가 난다. sf.format(dateTime)의 dateTime은 Date객체가 들어가야 한다.
//
//  return changeDay;
 }
 /**
  * 인수로 14자리 형태의 일시를 받아 yyyy.MM.dd HH:mm:ss 형태의 String으로 만들어 return
  * - 글 상세보기에서 사용할 메소드
  * 예)20120512100524 -> 2012.05.12 10:05:24
  * @param dateTime
  * @return
  */
 public static String changeDayTimeFormat(String dateTime){
 
  return dateTime.substring(0, 4)+"."+dateTime.substring(4, 6)+"."+dateTime.substring(6, 8)+" "+dateTime.substring(8, 10)+":"+dateTime.substring(10, 12)+":"+ dateTime.substring(12, 14);
 }
 /**
  * TextArea에서 입력 받은 글 내용을 HTML로 출력 될 때에 맞는 형식으로 변경하는 메소드
  * 새글등록, 답변글등록, 글 수정시 사용
  * > - >
  * < - &lt;
  * \n - <br>
  * 공백 - &nbsp;
  */
 public static String changeContentForDB(String content){
  //변환 시 순서가 중요
  String newContent = null;
  newContent = content.replaceAll(">", "&gt;");
  newContent = content.replaceAll("<","&lt;");
  newContent = content.replaceAll(" ","&nbsp;");
  newContent = content.replaceAll("\n", "<br>");
  
  return newContent;
 }
 /**
  * DB 에 저장된 content를 TextArea에 출력할 형식으로 변경
  * 글수정 폼, 답글 폼 출력시 사용
  * <br> - \n
  * &gt; ->
  * &lt; - <
  * &nbsp; - 공백
  */
 public static String changeContentForTextArea(String content){
  String newContent = null;
  newContent = content.replaceAll("<br>","\n");
  newContent = content.replaceAll("&gt;",">");
  newContent = content.replaceAll("&lt;","<");
  newContent = content.replaceAll("&nbsp;"," ");
 
  return newContent;
 }

 
}

 

<%@page import="board.dto.BoardDTO"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<center><h1>글목록</h1><p></center>
<body>

 <table border="1" cellspacing="0" cellpadding="8" align="center" width="500">
  <tr>
   <td>${requestScope.board.title }</td>
  </tr>
  <tr>
   <td>작성자 : ${requestScope.board.writer } 조회수 :
    ${requestScope.board.viewcount } 작성일시 :
    ${requestScope.board.writedate }</td>
  <tr valign="top" height="200">
   <td><c:out value="${requestScope.board.content }" escapeXml="true"/></td>
  </tr>
 </table>
</body>
</html>

 

<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 <h1>write.jsp</h1>
 <p>
 <h3>글쓰기</h3>
 <p>
 <form action="/board_fc/boardController" method="post">
 
 <input type="hidden" name="command" value="write">
  <table>
   <tr>
    <td>제목</td>
    <td><input type="text" name="title"></td>
   </tr>
   <tr>
    <td>작성자</td>
    <td><input type="text" name="writer" size="10" maxlength="10"></td>
   </tr>
   <tr>
    <td colspan="2"><textarea cols="50" rows="10" name="content"></textarea></td>
   </tr>
   <tr>
    <td colspan="2" align="center"><input type="submit" value="등록"><input
     type="reset" value="초기화"></td>
   </tr>
  </table>
 </form>
</body>
</html>

 

* 결과보기