Javaアプリ (Q&Aシステム)で、すでに登録済みの質問を編集したい  
※最初の質問時にあらかじめ設定した編集キーと入力した編集キーが一致した場合に編集可能にする

上記の [最初の質問投稿時に設定した編集キー] の取得ができず、入力キーと比較ができません。  
取得方法をご教示いただきたいです。

質問編集画面へ遷移させるコントローラ  
ConfirmServlet

```

    package servlet;
    
    import java.io.IOException;
    import java.util.List;
    
    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 javax.servlet.http.HttpSession;
    
    import logic.ConfirmQuestionLogic;
    import logic.GetAnswerLogic;
    import model.Answer;
    import model.Question;
    
    /**
     * Servlet implementation class ConfirmServlet
     */
    @WebServlet("/ConfirmServlet")
    public class ConfirmServlet extends HttpServlet {
        private static final long serialVersionUID = 1L;
    
    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            //文字コードエンコーディング
            request.setCharacterEncoding("UTF-8");
            //リクエストパラメータ取得
            // int question_id = this.question_id;
            int question_id = Integer.parseInt(request.getParameter("question_id"));
    
            //選択された行の質問リスト取得
            ConfirmQuestionLogic ConfirmQuestionLogic = new ConfirmQuestionLogic();
            List<Question> questionList = ConfirmQuestionLogic.confirm(question_id);
            HttpSession session = request.getSession();
            session.setAttribute("questionList", questionList);
    
            //選択された行の回答リスト取得
            GetAnswerLogic GetAnswerLogic = new GetAnswerLogic();
            List<Answer> answerList = GetAnswerLogic.getAnswer(question_id);
            session.setAttribute("answerList", answerList);
    
            //質問リスト画面へフォワード
            RequestDispatcher dispatcher =
                    request.getRequestDispatcher("/WEB-INF/jsp/QandAComfirm.jsp");
            dispatcher.forward(request, response);
        }
    }
    
    
```

編集画面へ遷移し、入力された値と設定されているキーを比較して更新するコントローラ  
EditQuestionServlet

```

    package servlet;
    
    import java.io.IOException;
    import java.util.List;
    
    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 javax.servlet.http.HttpSession;
    
    import logic.EditQuestionLogic;
    import logic.GetQuestionLogic;
    import model.Question;
    
    
    /**
     * Servlet implementation class EditServlet
     */
    @WebServlet("/EditQuestionServlet")
    public class EditQuestionServlet extends HttpServlet {
        private static final long serialVersionUID = 1L;
        private int question_id;
        private String update_timestamp;
    
        /**
         * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
         */
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
            //リクエストから取得した情報を表示
            HttpSession session = request.getSession();
            Question questionList = (Question) request.getAttribute("questionList");
            String eKey = questionList.getEdit_delete_key();
    
            //文字コードエンコーディング
            request.setCharacterEncoding("UTF-8");
            //リクエストパラメータ取得
            String editKey = request.getParameter("edit_delete_key");
    
            if(eKey == editKey){
                //入力されたキーの質問リストを取得してスコープへ保存
                EditQuestionLogic EditQuestionLogic = new EditQuestionLogic();
                List<Question> EditQuestionList = EditQuestionLogic.findKey(editKey);
                session.setAttribute("EditQuestionList", EditQuestionList);
                //質問編集画面へフォワード
                RequestDispatcher dispatcher =
                            request.getRequestDispatcher("/WEB-INF/jsp/QandAEdit.jsp");
                dispatcher.forward(request, response);
            } else {
                //質問リスト画面へフォワード
                RequestDispatcher dispatcher =
                            request.getRequestDispatcher("/WEB-INF/jsp/QandAList.jsp");
                dispatcher.forward(request, response);
            }
        }
    }
    
    
```

QandAComfirm.jsp

```

    <%@ page language="java" contentType="text/html; charset=UTF-8"
       pageEncoding="UTF-8" %>
    <%@ page import="java.util.Date,java.text.SimpleDateFormat" %>
    <%@ page import="model.Question"%>
    <%@ page import="model.Answer"%>
    <%@ page import="java.util.List"%>
    <%
      @SuppressWarnings("unchecked")
      List<Question> qlist = (List<Question>) session.getAttribute("questionList");
    %>
    <%
      @SuppressWarnings("unchecked")
      List<Answer> alist = (List<Answer>) session.getAttribute("answerList");
    %>
    
    
    <!DOCTYPE html>
    <html lang="ja">
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width,initial-scale=1.0">
        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
        <title>質問確認画面</title>
        <link rel="stylesheet" href="css/QandAConfirm.css">
    </head>
    <body>
      <header>
        <div class="container">
          <div class="header-flex">
            <div class="header-left">
              <h3>質問内容</h3>
            </div>
            <div class="header-right">
              <a href="#" class="btn">戻る</a>
            </div>
          </div>
        </div>
      </header>
    
      <div class="inform">
        <div class="container">
        <form name="questionForm" action="EditQuestionServlet" method="get">
            <table border="1">
            <% for (int i=0; i<qlist.size(); i++) { %>
                <tr>
                    <th>名前(ハンドルネーム)</th>
                    <td><%=qlist.get(i).getHandle_name()%></td>
                </tr>
                <tr>
                    <th>タイトル</th>
                    <td><%=qlist.get(i).getTitle()%></td>
                </tr>
                <tr>
                    <th class="contents">内容</th>
                    <td><%=qlist.get(i).getContents()%></td>
                </tr>
                <tr>
                    <th>緊急度</th>
                    <td><%=qlist.get(i).getUrgency()%></td>
                </tr>
           <% } %>
          </table>
          </form>
        </div>
      </div>
    
          <div class="key">
            <div class="container">
              <div class="key-flex">
               <form name="keyForm" action="EditQuestionServlet" method="get">
                 <table border="1">
                      <tr>
                        <th>編集・削除キー</th>
                        <td><input type="text" name="edit_delete_key"></td>
                     </tr>
                 </table>
                 <div class="key-a">
                 <input type="submit" name="edit" value="編集する">
                 </div>
               </form>
              </div>
            </div>
          </div>
    
          <div class="answer">
            <div class="container">
              <table border="1">
              <% for (int i=0; i<alist.size(); i++) { %>
                <tr>
                  <th>回答者<input type="text" class="table-answer"><%=alist.get(i).getHandle_name()%></th>
                  <th>回答日時<input type="text" class="table-answer"><%=alist.get(i).getRegist_timestamp()%></th>
                </tr>
              </table>
              <table>
                <tr>
                  <td>
                    <textarea name="answer" id="answer"><%=alist.get(i).getContents()%></textarea>
                  </td>
                </tr>
              </table>
              <table border="1">
                <tr>
                  <th>回答者<input type="text" class="table-answer"><%=alist.get(i).getHandle_name()%></th>
                  <th>回答日時<input type="text" class="table-answer"><%=alist.get(i).getRegist_timestamp()%></th>
                </tr>
              </table>
              <table>
                <tr>
                  <td>
                    <textarea name="answer" id="answer"><%=alist.get(i).getContents()%></textarea>
                  </td>
                </tr>
              <% } %>
              </table>
            </div>
          </div>
          <div class="kaitou">
            <div class="container">
              <p>回答する</p>
              <table border="1">
                <tr>
                  <th>名前(ハンドルネーム)</th>
                  <td><input type="text"></td>
                </tr>
                <tr>
                  <th>回答</th>
                  <td><textarea rows="10"></textarea></td>
                </tr>
              </table>
              <div class="answer-btn">
                <a href="#" class="btn" id="ans">回答する</a>
              </div>
            </div>
          </div>
          <script src="../WebContent/js/QandAConfirm.js"></script>
    </body>
    </html>
    
```

QandAEdit.jsp

```

    <%@ page language="java" contentType="text/html; charset=UTF-8"
       pageEncoding="UTF-8" %>
    <%@ page import="java.util.Date,java.text.SimpleDateFormat" %>
    <%@ page import="model.Question"%>
    <%@ page import="java.util.List"%>
    <%
      @SuppressWarnings("unchecked")
      List<Question> elist = (List<Question>) session.getAttribute("EditQuestionList");
    %>
    
    <!DOCTYPE html>
    <html lang="ja">
    <head>
      <meta charset="utf-8">
      <meta name="viewport" content=“width=device-width,initial-scale=1.0”>
      <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
      <title>質問編集画面</title>
      <link rel="stylesheet" href="css/QandAEdit.css">
    </head>
    <body>
    <header>
      <div class="container">
        <div class="header-flex">
          <div class="header-left">
            <h3>質問編集</h3>
          </div>
          <div class="header-right">
            <a href="#" class="btn">戻る</a>
          </div>
       </div>
      </div>
    </header>
    <section class="regist-form">
     <div class="container">
     <form action="/QandASystem/EditQuestionServlet" method="post">
      <table border="1">
      <% for (int i=0; i<elist.size(); i++) { %>
        <tr>
          <th>名前(ハンドルネーム)</th>
          <td><input type="text" value=<%=elist.get(i).getHandle_name()%> class="inp"></td>
        </tr>
        <tr>
          <th>タイトル</th>
          <td><input type="text" value=<%=elist.get(i).getTitle()%> class="inp"></td>
        </tr>
        <tr>
          <th class="contents">内容</th>
          <td><textarea rows="16"><%=elist.get(i).getContents()%></textarea></td>
        </tr>
        <tr class="urgency">
          <th>緊急度</th>
          <td>
            <label><input type="radio" name="urgency" value="1">急いでいます</label>
            <label><input type="radio" name="urgency" value="2">困ってます</label>
            <label><input type="radio" name="urgency" value="3">いつでも</label>
          </td>
        </tr>
        <tr>
          <th>編集・削除キー</th>
          <td><input type="text" value=<%=elist.get(i).getEdit_delete_key()%> class="inp"></td>
        </tr>
        <% } %>
      </table>
      <input type="submit" value="編集する">
      </form>
      </div>
    </section>
    <script src="js/QandAEdit.js"></script>
    </body>
    </html>
    
```
CC BY-SA 4.0
2020-06-13T06:36:51.583
67620
2020-06-13T11:16:16.040
2020-06-13T07:56:08.077
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question
java postgresql jsp servlet
Javaアプリ (Q&Aシステム)で、登録されている質問を編集したい
ぱっと見での回答ですが、String型を`==`で比較してしまっているので、それが原因ではないですかね？

```

            if(eKey == editKey){
    
```

↓

```

            if(eKey != null && eKey.equals(editKey)){
    
```
CC BY-SA 4.0
2020-06-13T11:16:16.040
67627
2020-06-13T11:16:16.040
21092
67620
answer