{"id":135293,"date":"2024-05-08T16:20:59","date_gmt":"2024-05-08T10:50:59","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=135293"},"modified":"2024-05-08T16:20:59","modified_gmt":"2024-05-08T10:50:59","slug":"session-management-using-hiddenfield-in-servlet","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/session-management-using-hiddenfield-in-servlet\/","title":{"rendered":"Session Management using HiddenField in Servlet"},"content":{"rendered":"

Program 2<\/h3>\n
\/*\r\n * To change this license header, choose License Headers in Project Properties.\r\n * To change this template file, choose Tools | Templates\r\n * and open the template in the editor.\r\n *\/\r\n\r\npackage controller;\r\n\r\nimport java.io.IOException;\r\nimport java.io.PrintWriter;\r\nimport javax.servlet.ServletException;\r\nimport javax.servlet.http.HttpServlet;\r\nimport javax.servlet.http.HttpServletRequest;\r\nimport javax.servlet.http.HttpServletResponse;\r\n\r\n\/**\r\n *\r\n * @author admin\r\n *\/\r\npublic class HiddenServlet1 extends HttpServlet {\r\n\r\n    \/**\r\n     * Processes requests for both HTTP <code>GET<\/code> and <code>POST<\/code>\r\n     * methods.\r\n     *\r\n     * @param request servlet request\r\n     * @param response servlet response\r\n     * @throws ServletException if a servlet-specific error occurs\r\n     * @throws IOException if an I\/O error occurs\r\n     *\/\r\n    protected void processRequest(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException {\r\n        response.setContentType(\"text\/html;charset=UTF-8\");\r\n        try (PrintWriter out = response.getWriter()) {\r\n            \/* TODO output your page here. You may use following sample code. *\/\r\n            out.println(\"<!DOCTYPE html>\");\r\n            out.println(\"<html>\");\r\n            out.println(\"<head>\");\r\n            out.println(\"<title>Servlet HiddenServlet1<\/title>\");            \r\n            out.println(\"<\/head>\");\r\n            out.println(\"<body>\");\r\n            out.println(\"<h1>Servlet HiddenServlet1 at \" + request.getContextPath() + \"<\/h1>\");\r\n              String user,pass;\r\n              user=request.getParameter(\"txtuser\");\r\n              pass=request.getParameter(\"txtpass\");\r\n              out.println(\"<form method=post action=HiddenServlet2>\");\r\n              out.println(\"<input type=hidden name=txtuser value=\"+user+\">\");\r\n              out.println(\"<input type=hidden name=txtpass value=\"+pass+\">\");\r\n              out.println(\"<input type=submit value=Submit>\");\r\n              out.println(\"<\/form>\");\r\n            out.println(\"<\/body>\");\r\n            out.println(\"<\/html>\");\r\n        }\r\n    }\r\n\r\n    \/\/ <editor-fold defaultstate=\"collapsed\" desc=\"HttpServlet methods. Click on the + sign on the left to edit the code.\">\r\n    \/**\r\n     * Handles the HTTP <code>GET<\/code> method.\r\n     *\r\n     * @param request servlet request\r\n     * @param response servlet response\r\n     * @throws ServletException if a servlet-specific error occurs\r\n     * @throws IOException if an I\/O error occurs\r\n     *\/\r\n    @Override\r\n    protected void doGet(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException {\r\n        processRequest(request, response);\r\n    }\r\n\r\n    \r\n    @Override\r\n    protected void doPost(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException \r\n    {\r\n        processRequest(request, response);\r\n    }\r\n\r\n    \r\n    @Override\r\n    public String getServletInfo() {\r\n        return \"Short description\";\r\n    }\/\/ <\/editor-fold>\r\n\r\n}<\/pre>\n
Program 3<\/h3>\n
\/*\r\n * To change this license header, choose License Headers in Project Properties.\r\n * To change this template file, choose Tools | Templates\r\n * and open the template in the editor.\r\n *\/\r\n\r\npackage controller;\r\n\r\nimport java.io.IOException;\r\nimport java.io.PrintWriter;\r\nimport javax.servlet.ServletException;\r\nimport javax.servlet.http.HttpServlet;\r\nimport javax.servlet.http.HttpServletRequest;\r\nimport javax.servlet.http.HttpServletResponse;\r\n\r\n\/**\r\n *\r\n * @author admin\r\n *\/\r\npublic class HiddenServlet2 extends HttpServlet {\r\n\r\n    \/**\r\n     * Processes requests for both HTTP <code>GET<\/code> and <code>POST<\/code>\r\n     * methods.\r\n     *\r\n     * @param request servlet request\r\n     * @param response servlet response\r\n     * @throws ServletException if a servlet-specific error occurs\r\n     * @throws IOException if an I\/O error occurs\r\n     *\/\r\n    protected void processRequest(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException {\r\n        response.setContentType(\"text\/html;charset=UTF-8\");\r\n        try (PrintWriter out = response.getWriter()) {\r\n            \/* TODO output your page here. You may use following sample code. *\/\r\n            out.println(\"<!DOCTYPE html>\");\r\n            out.println(\"<html>\");\r\n            out.println(\"<head>\");\r\n            out.println(\"<title>Servlet HiddenServlet2<\/title>\");            \r\n            out.println(\"<\/head>\");\r\n            out.println(\"<body>\");\r\n            out.println(\"<h1>Servlet HiddenServlet2 at \" + request.getContextPath() + \"<\/h1>\");\r\n            String user,pass;\r\n              user=request.getParameter(\"txtuser\");\r\n              pass=request.getParameter(\"txtpass\");\r\n              \r\n\/\/              out.println(\"User Name: \"+ user);\r\n\/\/              out.println(\"User Name: \"+ pass);\r\n              \r\n              out.println(\"<form method=post action=HiddenServlet3>\");\r\n              out.println(\"<input type=hidden name=txtuser value=\"+user+\">\");\r\n              out.println(\"<input type=hidden name=txtpass value=\"+pass+\">\");\r\n              out.println(\"<input type=submit value=Submit>\");\r\n              out.println(\"<\/form>\");\r\n              \r\n              \r\n            out.println(\"<\/body>\");\r\n            out.println(\"<\/html>\");\r\n        }\r\n    }\r\n\r\n    \/\/ <editor-fold defaultstate=\"collapsed\" desc=\"HttpServlet methods. Click on the + sign on the left to edit the code.\">\r\n    \/**\r\n     * Handles the HTTP <code>GET<\/code> method.\r\n     *\r\n     * @param request servlet request\r\n     * @param response servlet response\r\n     * @throws ServletException if a servlet-specific error occurs\r\n     * @throws IOException if an I\/O error occurs\r\n     *\/\r\n    @Override\r\n    protected void doGet(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException {\r\n        processRequest(request, response);\r\n    }\r\n\r\n    \/**\r\n     * Handles the HTTP <code>POST<\/code> method.\r\n     *\r\n     * @param request servlet request\r\n     * @param response servlet response\r\n     * @throws ServletException if a servlet-specific error occurs\r\n     * @throws IOException if an I\/O error occurs\r\n     *\/\r\n    @Override\r\n    protected void doPost(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException {\r\n        processRequest(request, response);\r\n    }\r\n\r\n    \/**\r\n     * Returns a short description of the servlet.\r\n     *\r\n     * @return a String containing servlet description\r\n     *\/\r\n    @Override\r\n    public String getServletInfo() {\r\n        return \"Short description\";\r\n    }\/\/ <\/editor-fold>\r\n\r\n}<\/pre>\n
Program 4<\/h3>\n
\/*\r\n * To change this license header, choose License Headers in Project Properties.\r\n * To change this template file, choose Tools | Templates\r\n * and open the template in the editor.\r\n *\/\r\n\r\npackage controller;\r\n\r\nimport java.io.IOException;\r\nimport java.io.PrintWriter;\r\nimport javax.servlet.ServletException;\r\nimport javax.servlet.http.HttpServlet;\r\nimport javax.servlet.http.HttpServletRequest;\r\nimport javax.servlet.http.HttpServletResponse;\r\n\r\n\/**\r\n *\r\n * @author admin\r\n *\/\r\npublic class HiddenServlet3 extends HttpServlet {\r\n\r\n    \/**\r\n     * Processes requests for both HTTP <code>GET<\/code> and <code>POST<\/code>\r\n     * methods.\r\n     *\r\n     * @param request servlet request\r\n     * @param response servlet response\r\n     * @throws ServletException if a servlet-specific error occurs\r\n     * @throws IOException if an I\/O error occurs\r\n     *\/\r\n    protected void processRequest(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException {\r\n        response.setContentType(\"text\/html;charset=UTF-8\");\r\n        try (PrintWriter out = response.getWriter()) {\r\n            \/* TODO output your page here. You may use following sample code. *\/\r\n            out.println(\"<!DOCTYPE html>\");\r\n            out.println(\"<html>\");\r\n            out.println(\"<head>\");\r\n            out.println(\"<title>Servlet HiddenServlet3<\/title>\");            \r\n            out.println(\"<\/head>\");\r\n            out.println(\"<body>\");\r\n            out.println(\"<h1>Servlet HiddenServlet3 at \" + request.getContextPath() + \"<\/h1>\");\r\n            String user,pass;\r\n              user=request.getParameter(\"txtuser\");\r\n              pass=request.getParameter(\"txtpass\");\r\n              \r\n              out.println(\"Customer Name: \"+ user);\r\n              out.println(\"Product Name: \"+ pass);\r\n            out.println(\"<\/body>\");\r\n            out.println(\"<\/html>\");\r\n        }\r\n    }\r\n\r\n    \/\/ <editor-fold defaultstate=\"collapsed\" desc=\"HttpServlet methods. Click on the + sign on the left to edit the code.\">\r\n    \/**\r\n     * Handles the HTTP <code>GET<\/code> method.\r\n     *\r\n     * @param request servlet request\r\n     * @param response servlet response\r\n     * @throws ServletException if a servlet-specific error occurs\r\n     * @throws IOException if an I\/O error occurs\r\n     *\/\r\n    @Override\r\n    protected void doGet(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException {\r\n        processRequest(request, response);\r\n    }\r\n\r\n    \/**\r\n     * Handles the HTTP <code>POST<\/code> method.\r\n     *\r\n     * @param request servlet request\r\n     * @param response servlet response\r\n     * @throws ServletException if a servlet-specific error occurs\r\n     * @throws IOException if an I\/O error occurs\r\n     *\/\r\n    @Override\r\n    protected void doPost(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException {\r\n        processRequest(request, response);\r\n    }\r\n\r\n    \/**\r\n     * Returns a short description of the servlet.\r\n     *\r\n     * @return a String containing servlet description\r\n     *\/\r\n    @Override\r\n    public String getServletInfo() {\r\n        return \"Short description\";\r\n    }\/\/ <\/editor-fold>\r\n\r\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"
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