20220323 º¹½À

Address, Lego °ü¸®½Ã½ºÅÛ ¹Ýº¹ ¿¬½À



1. Java Build Path

     -> Classpath (Add External JARs..) -> mysql-connector-java-8.0.27.jar Ãß°¡

2. Deployment Assembly

     -> Add -> Java Build Path Entries -> mysql-connector-java-8.0.27.jar Ãß°¡

3. DB ¿¬°á/ÇØÁ¦ÇÏ´Â connect()/disconnect() ¸Þ¼­µå ÀÛ¼º.

     Connection conn=null;
     PreparedStatement pstmt=null;
     String jdbc_driver = "com.mysql.cj.jdbc.Driver";
     String jdbc_url="jdbc:mysql://127.0.0.1:3306/db53";
     String id="root";
     String pw="123456";
     try {
          Class.forName(jdbc_driver);
          conn=DriverManager.getConnection(jdbc_url, id, pw);
     } catch (ClassNotFoundException e) {
          e.getStackTrace();
     } catch (SQLException e) {
          e.getStackTrace();
     }

4. ¸â¹öº¯¼ö(getter/setter) Ŭ·¡½º »ý¼º & ÇÊ¿äÇÑ ¸Þ¼­µå ¸ð¾Æ³õÀº Ŭ·¡½º »ý¼º.

     -> 3¹øÀÇ DB¿¬°á/ÇØÁ¦ ¸Þ¼­µå ¸¸µé¸é¼­ Ʋ ÀÛ¼º.
     private String name;
     private int num;

5. index.jsp ÀÛ¼º ( ¹Ù·Î ctl.jsp·Î À̵¿ )

     -> pageContext.forward("ctl.jsp?command=select");

6. ctl.jsp ÀÛ¼º

     select -> DB¿¡¼­ µ¥ÀÌÅÍ °¡Á®¿Í¼­ list.jsp¿¡ Ãâ·Â.

     insert -> form.jsp¿¡¼­ ÀÔ·ÂµÈ µ¥ÀÌÅ͸¦ DB¿¡ ÀÔ·Â.

     edit -> list.jsp¿¡¼­ ¼±ÅÃµÈ Ç׸ñ¸¸ DB¿¡¼­ ÂüÁ¶ÇÏ¿© edit_form.jsp¿¡ Ãâ·Â.

     update -> edit_form.jsp¿¡¼­ ¼öÁ¤µÈ µ¥ÀÌÅ͸¦ DB¿¡ ÀÔ·Â.

     delete -> edit_form.jsp¿¡¼­ ¼±ÅÃµÈ primary key¸¦ ÂüÁ¶ÇÏ¿© ÇØ´ç µ¥ÀÌÅÍ »èÁ¦.

     default -> ÆĶó¹ÌÅÍ ¿À·ù¸¦ ³ªÅ³»´Â ¹®±¸ Ãâ·Â.

     [«³«Ô«ÚéÄ]
     <% request.setCharacterEncoding("UTF-8"); %>
     <%@ page import="java.util.*" %>
     <jsp:useBean id="x" class="package.x" />
     <jsp:setProperty property="*" name="x" />

     String command = request.getParameter("command");
     request.setAttribute("x", x);
     pageContext.forward("x");
     response.sendRedirect("x");

     out.println("<script>alert('Please check Parameter out ^^')</script>");

7. list.jsp ÀÛ¼º

     -> Insert ¹öÆ°.
     -> À̸§ Ŭ¸¯½Ã ÇØ´ç Ç׸ñÀÇ µ¥ÀÌÅ͵éÀ» edit_formÀ¸·Î °¡Á®°¥ ¼ö ÀÖ´Â ¸µÅ©.

     [«³«Ô«ÚéÄ]
     <table width=100% border=1>
     <tr>
          <td>xxx</td>
          <td>xxx</td>
          <td>xxx</td>
          <td>xxx</td>
          <td>xxx</td>
     </tr>
     <% for( DataType x : Arr ) { %>
     <tr>
          <td><%=x.getPrimaryKey %></td>
          <td><%=x.getXxx %></td>
          <td><a href="x.jsp?command=edit&x=<%=x.getPrimaryKey%>"><%=x.getXXX %></a></td>
          <td><%=x.getXxx %></td>
          <td><%=x.getXxx %></td>
     </tr>
     <% } %>
     </table>
     <a href="/Project/Folder/X.jsp">LinkName</a>

     <form method="post" action="x.jsp">
     <input type="submit" value="Button Name">
     </form>

8. form.jsp ÀÛ¼º

     -> hiddenÀ¸·Î ³Ñ°Ü¾ßÇÒ °ªµé ÁÖÀÇ.
     -> head ¾È¿¡ script¸¦ »ç¿ëÇÏ¿© 'À¯È¿¼º °Ë»ç' ½ÇÇà.

     [«³«Ô«ÚéÄ]
     <input type="hidden" name="command" value="insert">
     <input type="text" name="x">
     <input type="radio" name="YorN" value="Y">Y
     <input type="radio" name="YorN" value="N">N
     <select name="x">
          <option value="x" selected>x
          <option value="x">x
          <option value="x">x
     </select>

     <input type="button" value="Button Name" onClick=Function Name()>
     <script type="text/javascript">
          function FunctionName(){
               alert('À¯È¿¼º °Ë»ç ÁøÇà');
               document.FormName.submit();
          }
     </script>

9. edit_form.jsp ÀÛ¼º

     -> hiddenÀ¸·Î Ä¿¸Çµå, primaryKey µî ³Ñ°ÜÁÖ±â ÁÖÀÇ.

     [«³«Ô«ÚéÄ] - value°ª ¼³Á¤ ÇÊ¿ä.
     <input type="text" name="x" value=<%=X.getXxx %> readonly>

     <input type="submit" value="Update!"> <input type="button" value="Delete!" onClick=delCheck()>
     <script type="text/javascript">
          function delCheck(){
               result = confirm('Á¤¸»·Î »èÁ¦ÇϽðڽÀ´Ï±î ?');
               if(result == true)
               {
                         document.FormName.command.value="delete";
                         document.FormName.submit();
               } else {
                    return;
               }
          }
     </script>

10. jsp ÆäÀÌÁö ¸¸µé ¶§

     -> ctl.jsp¿¡ À̵¿°æ·Î¿Í ÇÊ¿äÇÑ ¸Þ¼­µå ¼±¾ð.
     -> ÇÊ¿äÇÑ ¼ø¼­´ë·Î ¸Þ¼­µå Ŭ·¡½º¿¡ ÇÔ¼ö ÀÛ¼º.
     -> connect(), try~catch~ ÁÖÀÇ

     [«³«Ô«ÚéÄ]

     pstmt=conn.prepareStatement(sql);
     ResultSet rs = pstmt.executeQuery();
     while(rs.next()){
     
     }
     pstmt.executeUpdate();

     String sql="insert into TABLE(x,x) values(?,?)";
     String sql ="select * from TABLE";
     String sql = "select * from TABLE where PRIMARYKEY=?"
     String sql = "update TABLE set x=?,x=? where PRIMARYKEY=?";
     String sql = "delete from TABLE where PRIMARYKEY=?"