自動ログインコードの設定

8092 ワード

1ログインページの作成
新しいjspファイルファイルファイルファイルファイルにユーザーログインフォームを設定し、テストコードは以下の通りです.





  
    
    
    My JSP 'Login.jsp' starting page
    
    
    
        
    
    
    

  
  
  
     
username:
Password:
autologin:

システム共有コンテンツの取得
2フォーム処理ページの作成
新しいservletを作成し、ユーザー名とパスワードを読み取り、autoオプションに基づいてクッキーに書き込むかどうかを判断し、テストコードは以下の通りです.
package CLASS;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet {

    /**
         * Constructor of the object.
         */
    public LoginServlet() {
        super();
    }

    /**
         * The doGet method of the servlet. 
* * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String auto =request.getParameter("autologin"); String username =request.getParameter("username"); String password = request.getParameter("password"); if(auto!=null&&auto.equals("1")){ Cookie c = new Cookie("username",username); Cookie c2 = new Cookie("password",password); c.setMaxAge(60*60); c2.setMaxAge(60*60); c2.setSecure(false); c.setSecure(false); response.addCookie(c); response.addCookie(c2); } response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println(""-//W3C//DTD HTML 4.01 Transitional//EN\">"); out.println(""); out.println(" A Servlet"); out.println(" "); out.println("welcome "+username); out.println("***********************"); out.println(" "); out.println(""); out.flush(); out.close(); } /** * The doPost method of the servlet.
* * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println(""-//W3C//DTD HTML 4.01 Transitional//EN\">"); out.println(""); out.println(" A Servlet"); out.println(" "); out.print(" This is "); out.print(this.getClass()); out.println(", using the POST method"); out.println(" "); out.println(""); out.flush(); out.close(); } }

3自動ログインページの作成
ユーザーローカルクッキーを読み取り、ローカルで対応するクッキーが見つかった場合、クッキーの内容をユーザー名パスワードに持ち込みます.テストコードは次のとおりです.
package CLASS;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet {

    /**
         * Constructor of the object.
         */
    public LoginServlet() {
        super();
    }

    /**
         * The doGet method of the servlet. 
* * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String auto =request.getParameter("autologin"); String username =request.getParameter("username"); String password = request.getParameter("password"); if(auto!=null&&auto.equals("1")){ Cookie c = new Cookie("username",username); Cookie c2 = new Cookie("password",password); c.setMaxAge(60*60); c2.setMaxAge(60*60); c2.setSecure(false); c.setSecure(false); response.addCookie(c); response.addCookie(c2); } response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println(""-//W3C//DTD HTML 4.01 Transitional//EN\">"); out.println(""); out.println(" A Servlet"); out.println(" "); out.println("welcome "+username); out.println("***********************"); out.println(" "); out.println(""); out.flush(); out.close(); } /** * The doPost method of the servlet.
* * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println(""-//W3C//DTD HTML 4.01 Transitional//EN\">"); out.println(""); out.println(" A Servlet"); out.println(" "); out.print(" This is "); out.print(this.getClass()); out.println(", using the POST method"); out.println(" "); out.println(""); out.flush(); out.close(); } }