[프로그래밍] 게시판 만들기 도전,220302, 아직은 부족한 게시판

개발/코딩

[프로그래밍] 게시판 만들기 도전,220302, 아직은 부족한 게시판

mabb 2022. 3. 2. 00:24

(안녕하세요. 삶의 질을 높이고자 노력하는 영차영차입니다.
직장생활과 병행하여 22년3월을 기한으로 게시판 만들기에 도전해보고자 합니다.
해당 포스팅은 그 과정에 대한 순수 기록 목적입니다)

---------------------------------------------------------------------------------------------

배운 것을 토대로 일단 만들어봄.
점점 더 기능을 확장시켜보자.

BoardVo.java

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package com.tistory.mabb.freeboard;
 
import java.util.Date;
 
public class BoardVo {
    int num;
    String sub;
    String content;
    String writer;
    Date writetime;    //mysql의 timestamp와 호환이 되는 데이터유형으로 설정을 해야한다.
    
    public BoardVo() {
        
    }
    
    //생성자
    public BoardVo(int num,String sub,String content,String writer,Date writetime) {
        this.num = num;
        this.sub = sub;
        this.content = content;
        this.writer = writer;
        this.writetime = writetime;
        }
    
    public int getNum() {
        return num;
    }
    public void setNum(int num) {
        this.num = num;
    }
    public String getSub() {
        return sub;
    }
    public void setSub(String sub) {
        this.sub = sub;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
    public String getWriter() {
        return writer;
    }
    public void setWriter(String writer) {
        this.writer = writer;
    }
    public Date getWritetime() {
        return writetime;
    }
    public void setWritetime(Date writetime) {
        this.writetime = writetime;
    }
}
 
Colored by Color Scripter

cs

BoardDao.java

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package com.tistory.mabb.freeboard.dao;
 
import java.sql.Connection;
 
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.Date;
 
import com.tistory.mabb.freeboard.BoardVo;
 
public class BoardDao {
    private static String dburl = "jdbc:mysql://localhost:3306/board";
    private static String dbuser = "root";
    private static String dbpassword = "0000";
    
    
    Connection conn = null;
    PreparedStatement ps = null;
    ResultSet rs = null;
        
    public ArrayList<BoardVo> selectBoard() {
        ArrayList<BoardVo> list = new ArrayList<BoardVo>();
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            conn = DriverManager.getConnection(dburl, dbuser, dbpassword);
            String sql = "SELECT * FROM freeboard ORDER BY num desc";
            ps = conn.prepareStatement(sql);
            rs = ps.executeQuery();
            
            while (rs.next()) {
                int num = rs.getInt("num");
                String sub = rs.getString("sub");
                String content = rs.getString("content");
                String writer = rs.getString("writer");
                Date writetime = rs.getDate("writetime");
                
                BoardVo vo = new BoardVo(num, sub, content, writer, writetime);
                list.add(vo);    
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(rs != null) {
                try {rs.close();} catch (Exception e2) {e2.printStackTrace();}
                 }
            if(ps != null) {
                try {ps.close();} catch (Exception e2) {e2.printStackTrace();}
                }
            if(conn != null) {
                try {conn.close();} catch (Exception e2) {e2.printStackTrace();}
                }            
            }        
        return list;
        }
    
    public void insertBoard(String sub,String content,String writer) {
            try {
                Class.forName("com.mysql.cj.jdbc.Driver");
                conn = DriverManager.getConnection(dburl, dbuser, dbpassword);
                
                String sql = "insert into freeboard(num,sub,content,writer) "
                        + "values( (select num from (select max(num)+1 as num from freeboard)as freeboard_t),"
                        + "?,?,?);";
                
                ps = conn.prepareStatement(sql);    
                ps.setString(1, sub);
                ps.setString(2, content);
                ps.setString(3, writer);
                
                ps.executeUpdate();
                
                                
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if(ps != null) {
                    try {ps.close();} catch (Exception e2) {e2.printStackTrace();}
                    }
                if(conn != null) {
                    try {conn.close();} catch (Exception e2) {e2.printStackTrace();}
                    }            
                }                
    }
    
    public BoardVo contentBoard(int num_c) {
        
        BoardVo vo = new BoardVo();
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            conn = DriverManager.getConnection(dburl, dbuser, dbpassword);
            String sql = "SELECT * FROM freeboard WHERE num = ?";
            ps = conn.prepareStatement(sql);
            ps.setInt(1, num_c);
            rs = ps.executeQuery();
            
            while (rs.next()) {
                vo.setNum(rs.getInt("num"));
                vo.setSub(rs.getString("sub"));
                vo.setContent(rs.getString("content"));
                vo.setWriter(rs.getString("writer"));
                vo.setWritetime(rs.getDate("writetime"));                                                
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(rs != null) {
                try {rs.close();} catch (Exception e2) {e2.printStackTrace();}
                 }
            if(ps != null) {
                try {ps.close();} catch (Exception e2) {e2.printStackTrace();}
                }
            if(conn != null) {
                try {conn.close();} catch (Exception e2) {e2.printStackTrace();}
                }            
            }    
        return vo;
    }
 
}
 
Colored by Color Scripter

cs

MainServlet.java

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package com.tistory.mabb.freeboard.mainsevlet;
 
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
 
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import com.tistory.mabb.freeboard.BoardVo;
import com.tistory.mabb.freeboard.dao.BoardDao;
 
public class MainServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
 
    public MainServlet() {
        super();
        
    }
 
 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html;charset=utf-8");
        PrintWriter out = response.getWriter();
        
        BoardDao dao = new BoardDao();
        ArrayList<BoardVo> list = dao.selectBoard();
        request.setAttribute("list", list);
        RequestDispatcher requestDispatcher = request.getRequestDispatcher("/BoardMain.jsp");
        requestDispatcher.forward(request, response);    
        
    }
 
 
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
    }
 
}
 
Colored by Color Scripter

cs

InsertServlet.java

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package com.tistory.mabb.freeboard.mainsevlet;
 
import java.io.IOException;
import java.io.PrintWriter;
 
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import com.tistory.mabb.freeboard.dao.BoardDao;
 
 
public class InsertServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
 
    public InsertServlet() {
        super();
        
    }
 
 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html;charset=utf-8");
        PrintWriter out = response.getWriter();
        
        RequestDispatcher requestDispatcer = request.getRequestDispatcher("/BoardInsert.jsp");
        requestDispatcer.forward(request, response);
        
    
    }
 
 
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html;charset=utf-8");
        PrintWriter out = response.getWriter();
        
        request.setCharacterEncoding("utf-8");
        String sub = request.getParameter("sub");
        String content = request.getParameter("content");
        String writer = request.getParameter("writer");
        
        BoardDao dao = new BoardDao();
        dao.insertBoard(sub, content, writer);
        
        response.sendRedirect("Main");
    }
 
}
 
Colored by Color Scripter

cs

ContentServlet.java

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package com.tistory.mabb.freeboard.mainsevlet;
 
import java.io.IOException;
import java.io.PrintWriter;
 
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import com.tistory.mabb.freeboard.BoardVo;
import com.tistory.mabb.freeboard.dao.BoardDao;
 
 
public class ContentServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
 
    public ContentServlet() {
        super();
        
    }
 
 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html;charset=utf-8");
        PrintWriter out = response.getWriter();
        
        
        request.setCharacterEncoding("utf-8");
        String num_c = request.getParameter("num_c");
        BoardDao dao = new BoardDao();
        BoardVo vo = dao.contentBoard(Integer.parseInt(num_c));
        
        request.setAttribute("vo", vo);
        RequestDispatcher requestDispatcher = request.getRequestDispatcher("/BoardContent.jsp");
        requestDispatcher.forward(request, response);
        
        
    }
 
 
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
        doGet(request, response);
    }
 
}
 
Colored by Color Scripter

cs

BoardMain.jsp

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<%@page import="java.util.Date"%>
<%@page import="java.util.List"%>
<%@page import="com.tistory.mabb.freeboard.BoardVo"%>
<%@page import="java.util.ArrayList"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>영차영차게시판jsp</h1>
<hr>
 
<table>
<thead>
    <tr><th>번호</th><th>제목</th><th>작성자</th><th>날짜</th></tr>
</thead>
 
<%
     List<BoardVo> list = (List) request.getAttribute("list");
    for(BoardVo vo:list){
        int num = vo.getNum();
        String sub = vo.getSub();
        String writer = vo.getWriter();
        Date writetime = vo.getWritetime();
%>
<tbody>    
 <tr><td><%=num%></td><td><a href = "Content?num_c=<%=num%>"><%=sub%></a></td><td><%=writer%></td><td><%=writetime%></td></tr>
</tbody>
<%
    }
%>
 </table>
 
<form action = "Insert" >
    <input name="insertbutt" type = "submit" value = "작성">
</form>
 
</body>
</html>
Colored by Color Scripter

cs

B

BoardInsert.jsp

B


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<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
  <h1>글 작성 페이지</h1>
  <form action = "Insert" method ="POST" name = "insertBoard">
      제목:<input name = "sub" type = "text">작성자:<input name = "writer" type = "text"><br>
      내용:<textarea name = "content" type = "text" cols ="50" rows ="30"></textarea><br>
      <input name = "subm" type = "submit" value ="저장"><br>
      <input name = "listmove" href = "Main" type ="submit" value="목록">
      
 
      
  
  </form>
</body>
</html>
Colored by Color Scripter

cs

BoardContent.jsp

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<%@page import="java.util.Date"%>
<%@page import="com.tistory.mabb.freeboard.dao.BoardDao"%>
<%@page import="com.tistory.mabb.freeboard.BoardVo"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>게시글 상세보기</h1>
<hr>
 
<%
 
BoardVo vo = (BoardVo)request.getAttribute("vo");
int num = vo.getNum();
String sub = vo.getSub();
String content = vo.getContent();
String writer = vo.getWriter();
Date writetime = vo.getWritetime();
 
%>
 
<table>
<thead>
<tr>
<th>글번호</th><th><%= num %></th><th>작성자</th><th><%=writer %></th><th>작성시간</th><th><%=writetime %></th>
</tr>
<tr>
<th>제목</th><th><%=sub %></th>
</tr>
 
 
</thead>
<tbody>
 
<tr>
<td><%=content %></td>
</tr>
</tbody>
 
</table>
 
<form action = "Main">
<input type="submit" value ="목록">
</form>
 
 
</body>
</html>
Colored by Color Scripter

cs

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