サンプル
View class
LogonView.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "">http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=windows-31j"> <title>Login</title> </head> <body> <table border="0"> <form action="<%=request.getContextPath() %>/LogonPresenter" method="post"> <tr><th>User Name：</th><td><input type="text" name="userName"></td></tr> <tr><th>Password：</th><td><input type="password" name="password"></td></tr> <tr><th></th><td><input type="submit" value="Logon"></td></tr> </form> </table> </body> </html>
/Views/Logon/WelcomeView.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="com.sample.session.LogonPresenter" %> <% response.setHeader("Pragma", "no-cache"); response.setHeader("Cache-Control", "no-cache"); response.addHeader("Cache-Control", "no-store"); response.setDateHeader("Expires", -1); String uname = null; try { uname = (String) session .getAttribute(LogonnPresenter.SESSION_KEY_FOR_LOGIN_USER); } catch (Exception e) { } if (uname == null) { response.sendRedirect("../LogonView.jsp"); } %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "">http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Insert title here</title> </head> <body> <h1>Welcome!!</h1> <a href="<%=request.getContextPath()%>/Views/Logon/Site01.jsp">Go Site01</a> <a href="<%=request.getContextPath()%>/Views/Logon/Site02.jsp">Go Site02</a> <a href="<%=request.getContextPath()%>/Views/Logon/Site03.jsp">Go Site03</a> <a href="<%=request.getContextPath() %>/LogoffPresenter">Logoff</a> </body> </html>
/Views/Logon/Site01.jsp (Site02.jsg/Site03.jsg)
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ page import="com.sample.session.LogonPresenter" %> <% response.setHeader("Pragma", "no-cache"); response.setHeader("Cache-Control", "no-cache"); response.addHeader("Cache-Control", "no-store"); response.setDateHeader("Expires", -1); String uname = null; try { uname = (String) session .getAttribute(LogonPresenter.SESSION_KEY_FOR_LOGIN_USER); } catch (Exception e) { } if (uname == null) { response.sendRedirect("../LogonView.jsp"); } %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "">http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Insert title here</title> </head> <body> <h1>Hi</h1> <a href="<%= request.getContextPath() %>/Views/Logon/WelcomeView.jsp">Return Back</a> </body> </html>
Presenter class
LogonPresenter.java
package com.sample.session; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; /** * Servlet implementation class LoginPresenter */ public class LogonPresenter extends HttpServlet { public static final String SESSION_KEY_FOR_LOGIN_USER = "User"; private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public LogonPresenter() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String userName = request.getParameter("userName"); String password = request.getParameter("password"); // セッション取得 HttpSession session = request.getSession(true); // 既存セッション破棄 session.invalidate(); // 新規セッションを開始 HttpSession newSession = request.getSession(true); if ("admin".equals(userName) && "admin".equals(password)) { newSession.setAttribute(LogonPresenter.SESSION_KEY_FOR_LOGIN_USER, userName); response.sendRedirect(request.getContextPath() + "/Views/Logon/WelcomeView.jsp"); } else { newSession.setAttribute(LogonPresenter.SESSION_KEY_FOR_LOGIN_USER, null); newSession.removeAttribute(LogonPresenter.SESSION_KEY_FOR_LOGIN_USER); response.sendRedirect(request.getContextPath() + "/Views/LogonView.jsp"); } } }
LogoffPresenter.java
package com.sample.session; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; /** * Servlet implementation class LogoutPresenter */ public class LogoffPresenter extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public LogoffPresenter() { super(); } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(false); session.setAttribute(LogonPresenter.SESSION_KEY_FOR_LOGIN_USER, null); session.removeAttribute(LogonPresenter.SESSION_KEY_FOR_LOGIN_USER); request.getSession().invalidate(); response.sendRedirect(request.getContextPath() + "/Views/LogonView.jsp"); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request, response); } }
参考文献
http://www.orquesta.org/takegata/Article/ArticleView.jsp?article_id=630http://www.coderanch.com/t/485192/JSP/java/JSP-login-logout-session
