Cookies using JSP / Servlet

Login.jsp

<form action="rem" method="POST">
Enter Value: <input type="text" name="val" value=""/>
<input type="submit" value="Submit" />
</form>

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RemController.java

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    String myValue = request.getParameter("val");


    Cookie userCookie = new Cookie("u", myValue);
        userCookie.setMaxAge(60*60*24);
        response.addCookie(userCookie);


    request.getRequestDispatcher("Remember.jsp").forward(request, response);
    }
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Remember.jsp

<html>
 <%
        Cookie[] cookies=request.getCookies();
        Cookie cookie=null;
        if(cookies != null){
            for(int i=0; i<cookies.length; i++){
                cookie = cookies[i];
                System.out.print(cookie.getName()+": ");
                System.out.println(cookie.getValue());
            }
        }
        %>
</html>
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Login Page using Servlet / JSP

1. Servlet Mapping in web.xml

Transfering control from JSP (Login.jsp) file to a servlet (RemController.java) file.
 ----------------------------------------------------------------------------------------------------------------------------
Login.jsp

<form action="rem" method="POST">
Username: <input type="text" id="username" name="username" value=""/><br/>
Password: <input type="password" id="password" name="password" value=""/><br/>
<input type="submit" id="submit" value="Submit" /><br/>

</form>
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web.xml

 <servlet>
    <servlet-name>RemController</servlet-name>
    <servlet-class>myPkg.RemController</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>RemController</servlet-name>
    <url-pattern>/rem</url-pattern>
  </servlet-mapping>
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RemController.java

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setAttribute("result", "hello!");
      
        String name = request.getParameter("username");
        String password = request.getParameter("password");
      
        System.out.println(name+" "+password);
      
    //    response.sendRedirect("Remember.jsp");
        request.getRequestDispatcher("Remember.jsp").forward(request, response);
        }
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Remember.jsp

<html>
<body>
        <h1>Remember.jsp</h1>
        <p>The result is ${result}</p>
</body>
</html>
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