質問編集履歴
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↑の内容はcookieで実装済みなのでsessionとうまく組み合わせたいです。
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https://teratail.com/questions/186460
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また、hs.setAttribute(値)がobject型ということでStringに型変数が必要なのか?
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```java
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package org.session.sample;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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/**
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* Servlet implementation class SessionPractice
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*/
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@WebServlet("/SessionPractice")
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public class SessionPractice extends HttpServlet {
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private static final long serialVersionUID = 1L;
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/**
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* @see HttpServlet#HttpServlet()
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*/
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public SessionPractice() {
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super();
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// TODO Auto-generated constructor stub
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}
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/**
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* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
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*/
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException{
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response.setContentType("text/html;charset=UTF-8");
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try (PrintWriter out = response.getWriter()) {
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//現在の日時を作成
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Date now =new Date();
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//String型に変換
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SimpleDateFormat sdf =
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new SimpleDateFormat("H時mm分ss秒");
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String time=sdf.format(new Date());
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/*セッションの取得*/
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HttpSession hs = request.getSession(true);
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// セッションへ登録
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hs.setAttribute("Data", time);
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//object型をString型に変えるべきか考えた記述
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/* String a = hs.toString();*/
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//どこにcookieの記述を入れればいいかわからない
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hs.getAttribute("Data");
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out.print(time);
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}
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}
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/**
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* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
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*/
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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// TODO Auto-generated method stub
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doGet(request, response);
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}
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}
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```
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```
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組み合わせたいcookieの記述
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/*cookie作成*/
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Cookie c=new Cookie("Data",time);
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/*現在時刻を記録*/
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response.addCookie(c);
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/*クッキー情報の取得*/
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Cookie[]cs=request.getCookies();
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/*値が格納されているかの確認*/
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if(cs!=null) {
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for(int i=0;i<cs.length;i++) {
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/*getメソッドでクッキーの名前情報を取り出すw*/
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String cookieName=cs[i].getName();
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/*個々のクッキーの名前情報の値が"Data"と一致するか判定*/
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if(cookieName.equals("Data")) {
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/*getValueメソッドで値を取り出す*/
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String cookieValue=cs[i].getValue();
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out.print(cookieValue);
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break;
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}
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}
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}
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```
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修正
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```
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組み合わせたいcookieの記述
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/*cookie作成*/
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修正
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@@ -50,242 +50,240 @@
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```java
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package org.session.sample;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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/**
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* Servlet implementation class SessionPractice
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*/
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@WebServlet("/SessionPractice")
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public class SessionPractice extends HttpServlet {
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private static final long serialVersionUID = 1L;
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/**
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* @see HttpServlet#HttpServlet()
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*/
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public SessionPractice() {
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super();
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// TODO Auto-generated constructor stub
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}
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/**
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* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
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*/
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException{
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response.setContentType("text/html;charset=UTF-8");
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try (PrintWriter out = response.getWriter()) {
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//現在の日時を作成
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Date now =new Date();
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+
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+
//String型に変換
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+
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SimpleDateFormat sdf =
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new SimpleDateFormat("H時mm分ss秒");
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String time=sdf.format(new Date());
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/*セッションの取得*/
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HttpSession hs = request.getSession(true);
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// セッションへ登録
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hs.setAttribute("Data", time);
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//object型をString型に変えるべきか考えた記述
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/* String a = hs.toString();*/
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//どこにcookieの記述を入れればいいかわからない
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hs.getAttribute("Data");
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out.print(time);
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}
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}
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/**
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* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
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*/
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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// TODO Auto-generated method stub
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doGet(request, response);
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}
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}
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```
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```うまく組み合わせたいcookieの記述
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/*cookie作成*/
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Cookie c=new Cookie("Data",time);
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/*現在時刻を記録*/
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response.addCookie(c);
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/*クッキー情報の取得*/
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Cookie[]cs=request.getCookies();
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/*値が格納されているかの確認*/
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if(cs!=null) {
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for(int i=0;i<cs.length;i++) {
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/*getメソッドでクッキーの名前情報を取り出すw*/
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+
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String cookieName=cs[i].getName();
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+
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259
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/*個々のクッキーの名前情報の値が"Data"と一致するか判定*/
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+
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if(cookieName.equals("Data")) {
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/*getValueメソッドで値を取り出す*/
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String cookieValue=cs[i].getValue();
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out.print(cookieValue);
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break;
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}
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}
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}
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```
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61
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63
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```ここに言語名を入力
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64
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66
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67
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java セッション cookie
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``` ### 該当のソースコ-ド ```java
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package org.session.sample;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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/**
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* Servlet implementation class SessionPractice
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*/
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@WebServlet("/SessionPractice")
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public class SessionPractice extends HttpServlet {
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private static final long serialVersionUID = 1L;
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/**
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* @see HttpServlet#HttpServlet()
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*/
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public SessionPractice() {
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super();
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// TODO Auto-generated constructor stub
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}
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/**
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* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
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*/
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException{
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response.setContentType("text/html;charset=UTF-8");
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try (PrintWriter out = response.getWriter()) {
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Date now =new Date();
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SimpleDateFormat sdf =
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new SimpleDateFormat("H時mm分ss秒");
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String time=sdf.format(new Date());
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/*セッションの取得*/
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HttpSession hs = request.getSession(true);
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// セッションへ登録
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hs.setAttribute("Data", time);
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/* String a = hs.toString();*/
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//どこにcookieの記述を入れればいいかわからない
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hs.getAttribute("Data");
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out.print(time);
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}
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}
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/**
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* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
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*/
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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// TODO Auto-generated method stub
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doGet(request, response);
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}
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}
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```
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222
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|
223
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|
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|
225
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```うまく組み合わせたいcookieの記述
|
226
|
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/*cookie作成*/
|
228
|
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229
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230
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231
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Cookie c=new Cookie("Data",time);
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/*現在時刻を記録*/
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response.addCookie(c);
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236
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237
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238
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239
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/*クッキー情報の取得*/
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240
|
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|
241
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Cookie[]cs=request.getCookies();
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242
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243
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/*値が格納されているかの確認*/
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246
|
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247
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248
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|
249
|
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if(cs!=null) {
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250
|
-
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251
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252
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-
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253
|
-
for(int i=0;i<cs.length;i++) {
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254
|
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255
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|
256
|
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|
257
|
-
/*getメソッドでクッキーの名前情報を取り出すw*/
|
258
|
-
|
259
|
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String cookieName=cs[i].getName();
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260
|
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261
|
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|
262
|
-
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263
|
-
/*個々のクッキーの名前情報の値が"Data"と一致するか判定*/
|
264
|
-
|
265
|
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|
266
|
-
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267
|
-
if(cookieName.equals("Data")) {
|
268
|
-
|
269
|
-
|
270
|
-
|
271
|
-
/*getValueメソッドで値を取り出す*/
|
272
|
-
|
273
|
-
|
274
|
-
|
275
|
-
String cookieValue=cs[i].getValue();
|
276
|
-
|
277
|
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|
278
|
-
|
279
|
-
out.print(cookieValue);
|
280
|
-
|
281
|
-
|
282
|
-
|
283
|
-
break;
|
284
|
-
|
285
|
-
}
|
286
|
-
|
287
|
-
}
|
288
|
-
|
289
|
-
}
|
290
|
-
|
291
|
-
```
|
1
修正
test
CHANGED
File without changes
|
test
CHANGED
@@ -287,3 +287,5 @@
|
|
287
287
|
}
|
288
288
|
|
289
289
|
}
|
290
|
+
|
291
|
+
```
|