글 수정 기능 구현
이번에는 기존에 작성한 글을 수정하는 기능을 구현해 보겠습니다.
글 수정 기능을 구현하는 과정은 다음과 같습니다.
① 글 상세창(viewArticle.jsp)에서 수정하기를 클릭해 글 정보를 표시하는 입력창들을 활성화합니다.
② 글 정보와 이미지를 수정한 후 수정반역하기를 클릭해 컨트롤러에 /board/modArticle.do로 요청합니다.
③ 컨트롤러는 요청애 대해 upload() 메서드를 이용하여 수정된 데이터를 Map에 저장하고 반환합니다.
④ 컨트롤러는 수정된 데이터를 테이블에 반영한 후 temp 폴더에 업로드된 수정 이미지를 글 번호 폴더로 이동합니다.
⑤ 마지막으로 글 번호 폴더에 있던 원래 이미지 파일을 삭제합니다.
1. sec03.brd05 패키지를 만들고 글 수정 기능과 관련된 클래스를 다음과 같이 추가합니다.
2. BoardController 클래스를 다음과 같이 작성합니다. 컨트롤러에서 수정을 요청하면 upload() 메서드를 이용해 수정 데이터를 Map으로 가져옵니다. Map의 데이터를 다시 ArticleVO 객체의 속성에 저장한 후 SQL문으로 전달하여 수정 데이터를 반영합니다. 마지막으로 temp 폴더에 업로드된 수정 이미지를 다시 글 번호 폴더로 이동하고 글 번호 폴더의 원래 이미지를 삭제합니다.
package sec03.brd05;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.RequestDispatcher;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
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 org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileUtils;
/**
* Servlet implementation class BoardController
*/
@WebServlet("/board/*")
public class BoardController extends HttpServlet {
private static String ARTICLE_IMAGE_REPO = "C:\\board\\article_image";
BoardService boardService;
ArticleVO articleVO;
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
boardService = new BoardService();
articleVO = new ArticleVO();
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doHandle(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doHandle(request, response);
}
private void doHandle(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String nextPage = "";
request.setCharacterEncoding("utf-8");
response.setContentType("text/html; charset=utf-8");
String action = request.getPathInfo();
System.out.println("action:" + action);
try {
List<ArticleVO> articlesList = new ArrayList<ArticleVO>();
if (action == null) {
articlesList = boardService.listArticles();
request.setAttribute("articlesList", articlesList);
nextPage = "/board04/listArticles.jsp";
} else if (action.equals("/listArticles.do")) {
articlesList = boardService.listArticles();
request.setAttribute("articlesList", articlesList);
nextPage = "/board04/listArticles.jsp";
} else if (action.equals("/articleForm.do")) {
nextPage = "/board04/articleForm.jsp";
} else if (action.equals("/addArticle.do")) {
int articleNO = 0;
Map<String, String> articleMap = upload(request, response);
String title = articleMap.get("title");
String content = articleMap.get("content");
String imageFileName = articleMap.get("imageFileName");
articleVO.setParentNO(0);
articleVO.setId("hong");
articleVO.setTitle(title);
articleVO.setContent(content);
articleVO.setImageFileName(imageFileName);
articleNO = boardService.addArticle(articleVO);
if (imageFileName != null && imageFileName.length() != 0) {
File srcFile = new File(ARTICLE_IMAGE_REPO + "\\" + "temp" + "\\" + imageFileName);
File destDir = new File(ARTICLE_IMAGE_REPO + "\\" + articleNO);
destDir.mkdirs();
FileUtils.moveFileToDirectory(srcFile, destDir, true);
srcFile.delete();
}
PrintWriter pw = response.getWriter();
pw.print("<script>" + " alert('새글을 추가했습니다.');" + " location.href='" + request.getContextPath()
+ "/board/listArticles.do';" + "</script>");
return;
} else if (action.equals("/viewArticle.do")) {
String articleNO = request.getParameter("articleNO");
articleVO = boardService.viewArticle(Integer.parseInt(articleNO));
request.setAttribute("article", articleVO);
nextPage = "/board04/viewArticle.jsp";
} else if (action.equals("/modArticle.do")) {
Map<String, String> articleMap = upload(request, response);
int articleNO = Integer.parseInt(articleMap.get("articleNO"));
articleVO.setArticleNO(articleNO);
String title = articleMap.get("title");
String content = articleMap.get("content");
String imageFileName = articleMap.get("imageFileName");
articleVO.setParentNO(0);
articleVO.setId("hong");
articleVO.setTitle(title);
articleVO.setContent(content);
articleVO.setImageFileName(imageFileName);
boardService.modArticle(articleVO);
if (imageFileName != null && imageFileName.length() != 0) {
String originalFileName = articleMap.get("originalFileName");
File srcFile = new File(ARTICLE_IMAGE_REPO + "\\" + "temp" + "\\" + imageFileName);
File destDir = new File(ARTICLE_IMAGE_REPO + "\\" + articleNO);
destDir.mkdirs();
FileUtils.moveFileToDirectory(srcFile, destDir, true);
;
File oldFile = new File(ARTICLE_IMAGE_REPO + "\\" + articleNO + "\\" + originalFileName);
oldFile.delete();
}
PrintWriter pw = response.getWriter();
pw.print("<script>" + " alert('글을 수정했습니다.');" + " location.href='" + request.getContextPath()
+ "/board/viewArticle.do?articleNO=" + articleNO + "';" + "</script>");
return;
}else {
nextPage = "/board04/listArticles.jsp";
}
RequestDispatcher dispatch = request.getRequestDispatcher(nextPage);
dispatch.forward(request, response);
} catch (Exception e) {
e.printStackTrace();
}
}
private Map<String, String> upload(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Map<String, String> articleMap = new HashMap<String, String>();
String encoding = "utf-8";
File currentDirPath = new File(ARTICLE_IMAGE_REPO);
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setRepository(currentDirPath);
factory.setSizeThreshold(1024 * 1024);
ServletFileUpload upload = new ServletFileUpload(factory);
try {
List items = upload.parseRequest(request);
for (int i = 0; i < items.size(); i++) {
FileItem fileItem = (FileItem) items.get(i);
if (fileItem.isFormField()) {
System.out.println(fileItem.getFieldName() + "=" + fileItem.getString(encoding));
articleMap.put(fileItem.getFieldName(), fileItem.getString(encoding));
} else {
System.out.println("파라미터명:" + fileItem.getFieldName());
//System.out.println("파일명:" + fileItem.getName());
System.out.println("파일크기:" + fileItem.getSize() + "bytes");
//articleMap.put(fileItem.getFieldName(), fileItem.getName());
if (fileItem.getSize() > 0) {
int idx = fileItem.getName().lastIndexOf("\\");
if (idx == -1) {
idx = fileItem.getName().lastIndexOf("/");
}
String fileName = fileItem.getName().substring(idx + 1);
System.out.println("파일명:" + fileName);
articleMap.put(fileItem.getFieldName(), fileName); //익스플로러에서 업로드 파일의 경로 제거 후 map에 파일명 저장
File uploadFile = new File(currentDirPath + "\\temp\\" + fileName);
fileItem.write(uploadFile);
} // end if
} // end if
} // end for
} catch (Exception e) {
e.printStackTrace();
}
return articleMap;
}
}
3. BoardService 클래스를 다음과 같이 작성합니다. 컨트롤러에서 modArticle() 메서드를 호출하면 다시 BoardDAO의 updateArticle() 메서드를 호출하면서 수정 데이터를 전달합니다.
package sec03.brd05;
import java.util.List;
public class BoardService {
BoardDAO boardDAO;
public BoardService() {
boardDAO = new BoardDAO();
}
public List<ArticleVO> listArticles() {
List<ArticleVO> articlesList = boardDAO.selectAllArticles();
return articlesList;
}
public int addArticle(ArticleVO article) {
return boardDAO.insertNewArticle(article);
}
public ArticleVO viewArticle(int articleNO) {
ArticleVO article = null;
article = boardDAO.selectArticle(articleNO);
return article;
}
public void modArticle(ArticleVO article) {
boardDAO.updateArticle(article);
}
}
4. BoardDAO 클래스를 다음과 같이 작성합니다. 전달된 수정 데이터에 대해 이미지 파일을 수정하지 않는 경우를 동적으로 SQL문을 생성하여 수정 데이터를 반영합니다.
package sec03.brd05;
import java.net.URLEncoder;
import java.sql.Connection;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;
public class BoardDAO {
private DataSource dataFactory;
Connection conn;
PreparedStatement pstmt;
public BoardDAO() {
try {
Context ctx = new InitialContext();
Context envContext = (Context) ctx.lookup("java:/comp/env");
dataFactory = (DataSource) envContext.lookup("jdbc/oracle");
} catch (Exception e) {
e.printStackTrace();
}
}
public List<ArticleVO> selectAllArticles() {
List<ArticleVO> articlesList = new ArrayList<ArticleVO>();
try {
conn = dataFactory.getConnection();
String query = "SELECT LEVEL,articleNO,parentNO,title,content,id,writeDate" + " from t_board"
+ " START WITH parentNO=0" + " CONNECT BY PRIOR articleNO=parentNO"
+ " ORDER SIBLINGS BY articleNO DESC";
System.out.println(query);
pstmt = conn.prepareStatement(query);
ResultSet rs = pstmt.executeQuery();
while (rs.next()) {
int level = rs.getInt("level");
int articleNO = rs.getInt("articleNO");
int parentNO = rs.getInt("parentNO");
String title = rs.getString("title");
String content = rs.getString("content");
String id = rs.getString("id");
Date writeDate = rs.getDate("writeDate");
ArticleVO article = new ArticleVO();
article.setLevel(level);
article.setArticleNO(articleNO);
article.setParentNO(parentNO);
article.setTitle(title);
article.setContent(content);
article.setId(id);
article.setWriteDate(writeDate);
articlesList.add(article);
}
rs.close();
pstmt.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
return articlesList;
}
private int getNewArticleNO() {
try {
conn = dataFactory.getConnection();
String query = "SELECT max(articleNO) from t_board ";
System.out.println(query);
pstmt = conn.prepareStatement(query);
ResultSet rs = pstmt.executeQuery(query);
if (rs.next())
return (rs.getInt(1) + 1);
rs.close();
pstmt.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}
public int insertNewArticle(ArticleVO article) {
int articleNO = getNewArticleNO();
try {
conn = dataFactory.getConnection();
int parentNO = article.getParentNO();
String title = article.getTitle();
String content = article.getContent();
String id = article.getId();
String imageFileName = article.getImageFileName();
String query = "INSERT INTO t_board (articleNO, parentNO, title, content, imageFileName, id)"
+ " VALUES (?, ? ,?, ?, ?, ?)";
System.out.println(query);
pstmt = conn.prepareStatement(query);
pstmt.setInt(1, articleNO);
pstmt.setInt(2, parentNO);
pstmt.setString(3, title);
pstmt.setString(4, content);
pstmt.setString(5, imageFileName);
pstmt.setString(6, id);
pstmt.executeUpdate();
pstmt.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
return articleNO;
}
public ArticleVO selectArticle(int articleNO) {
ArticleVO article = new ArticleVO();
try {
conn = dataFactory.getConnection();
String query = "select articleNO,parentNO,title,content, NVL(imageFileName, 'null') as imageFileName,id, writeDate" + " from t_board"
+ " where articleNO=?";
System.out.println(query);
pstmt = conn.prepareStatement(query);
pstmt.setInt(1, articleNO);
ResultSet rs = pstmt.executeQuery();
rs.next();
int _articleNO = rs.getInt("articleNO");
int parentNO = rs.getInt("parentNO");
String title = rs.getString("title");
String content = rs.getString("content");
String imageFileName = URLEncoder.encode(rs.getString("imageFileName"), "UTF-8"); //�����̸��� Ư�����ڰ� ���� ��� ���ڵ��մϴ�.
if(imageFileName.equals("null")) {
imageFileName = null;
}
String id = rs.getString("id");
Date writeDate = rs.getDate("writeDate");
article.setArticleNO(_articleNO);
article.setParentNO(parentNO);
article.setTitle(title);
article.setContent(content);
article.setImageFileName(imageFileName);
article.setId(id);
article.setWriteDate(writeDate);
rs.close();
pstmt.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
return article;
}
public void updateArticle(ArticleVO article) {
int articleNO = article.getArticleNO();
String title = article.getTitle();
String content = article.getContent();
String imageFileName = article.getImageFileName();
try {
conn = dataFactory.getConnection();
String query = "update t_board set title=?,content=?";
if (imageFileName != null && imageFileName.length() != 0) {
query += ",imageFileName=?";
}
query += " where articleNO=?";
System.out.println(query);
pstmt = conn.prepareStatement(query);
pstmt.setString(1, title);
pstmt.setString(2, content);
if (imageFileName != null && imageFileName.length() != 0) {
pstmt.setString(3, imageFileName);
pstmt.setInt(4, articleNO);
} else {
pstmt.setInt(3, articleNO);
}
pstmt.executeUpdate();
pstmt.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
5. viewArticle.jsp를 다음과 같이 작성합니다. 수정하기를 클릭해 fn_enable() 함수를 호출하여 비활성화된 텍스트 박스를 수정할 수 있도록 활성화시킵니다. 또한 글 정보와 이미지를 수정한 후 수정반영하기를 클릭하면 fn_modify_article() 함수를 호출하여 컨트롤러로 수정 데이터를 전송합니다.
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"
isELIgnored="false" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
request.setCharacterEncoding("UTF-8");
%>
<c:set var="contextPath" value="${pageContext.request.contextPath}" />
<head>
<meta charset="UTF-8">
<title>글보기</title>
<style>
#tr_btn_modify{
display:none;
}
</style>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<c:choose>
<c:when test="${not empty article.imageFileName && article.imageFileName!='null' }">
<script type="text/javascript" >
function fn_enable(obj){
document.getElementById("i_title").disabled=false;
document.getElementById("i_content").disabled=false;
document.getElementById("i_imageFileName").disabled=false;
document.getElementById("tr_btn_modify").style.display="block";
document.getElementById("tr_btn").style.display="none";
}
</script>
</c:when>
<c:otherwise>
<script type="text/javascript" >
function fn_enable(obj){
document.getElementById("i_title").disabled=false;
document.getElementById("i_content").disabled=false;
document.getElementById("tr_btn_modify").style.display="block";
document.getElementById("tr_btn").style.display="none";
}
</script>
</c:otherwise>
</c:choose>
<script type="text/javascript" >
function backToList(obj){
obj.action="${contextPath}/board/listArticles.do";
obj.submit();
}
/*
function fn_enable(obj){
document.getElementById("i_title").disabled=false;
document.getElementById("i_content").disabled=false;
document.getElementById("i_imageFileName").disabled=false;
document.getElementById("tr_btn_modify").style.display="block";
document.getElementById("tr_btn").style.display="none";
}
*/
function fn_modify_article(obj){
obj.action="${contextPath}/board/modArticle.do";
obj.submit();
}
function fn_remove_article(url,articleNO){
var form = document.createElement("form");
form.setAttribute("method", "post");
form.setAttribute("action", url);
var articleNOInput = document.createElement("input");
articleNOInput.setAttribute("type","hidden");
articleNOInput.setAttribute("name","articleNO");
articleNOInput.setAttribute("value", articleNO);
form.appendChild(articleNOInput);
document.body.appendChild(form);
form.submit();
}
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#preview').attr('src', e.target.result);
}
reader.readAsDataURL(input.files[0]);
}
}
</script>
</head>
<body>
<form name="frmArticle" method="post" action="${contextPath}" enctype="multipart/form-data">
<table border="0" align="center" >
<tr>
<td width="150" align="center" bgcolor="#FF9933">
글번호
</td>
<td >
<input type="text" value="${article.articleNO }" disabled />
<input type="hidden" name="articleNO" value="${article.articleNO}" />
</td>
</tr>
<tr>
<td width="150" align="center" bgcolor="#FF9933">
작성자 아이디
</td>
<td >
<input type=text value="${article.id }" name="writer" disabled />
</td>
</tr>
<tr>
<td width="150" align="center" bgcolor="#FF9933">
제목
</td>
<td>
<input type="text" value="${article.title }" name="title" id="i_title" disabled />
</td>
</tr>
<tr>
<td width="150" align="center" bgcolor="#FF9933">
내용
</td>
<td>
<textarea rows="20" cols="60" name="content" id="i_content" disabled />${article.content }</textarea>
</td>
</tr>
<c:if test="${not empty article.imageFileName && article.imageFileName!='null' }">
<tr>
<td width="150" align="center" bgcolor="#FF9933" rowspan="2">
이미지
</td>
<td>
<input type= "hidden" name="originalFileName" value="${article.imageFileName }" />
<img src="${contextPath}/download.do?articleNO=${article.articleNO}&imageFileName=${article.imageFileName}" id="preview" /><br>
</td>
</tr>
<tr>
<td>
<input type="file" name="imageFileName " id="i_imageFileName" disabled onchange="readURL(this);" />
</td>
</tr>
</c:if>
<tr>
<td width="150" align="center" bgcolor="#FF9933">
등록일자
</td>
<td>
<input type=text value="<fmt:formatDate value="${article.writeDate}" />" disabled />
</td>
</tr>
<tr id="tr_btn_modify" >
<td colspan="2" align="center" >
<input type=button value="수정반영하기" onClick="fn_modify_article(frmArticle)" >
<input type=button value="취소" onClick="backToList(frmArticle)">
</td>
</tr>
<tr id="tr_btn" >
<td colspan=2 align=center>
<input type=button value="수정하기" onClick="fn_enable(this.form)">
<input type=button value="삭제하기" onClick="fn_remove_article('${contextPath}/board/removeArticle.do', ${article.articleNO})">
<input type=button value="리스트로 돌아가기" onClick="backToList(this.form)">
<input type=button value="답글쓰기" onClick="fn_reply_form('${contextPath}/board/replyForm.do', ${article.articleNO})">
</td>
</tr>
</table>
</form>
</body>
</html>
6. 글 상세창에서 수정하기를 클릭해 글 정보가 표시된 텍스트 박스를 활성화시킵니다.
7. 글 정보와 이미지 파일을 수정한 후 수정반영하기를 클릭해 /board/modArticle.do로 요청합니다.
8. 글 수정 후 수정된 내용으로 글 상세 화면에 표시합니다.
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