JSP-Session Management using Cookies
Introduction:
Cookies are small information that is send to the server from browser for later use. When we manage session in jsp, cookies are used to manage session. There are four ways to manage the session. In this lesson, we will learn how to create cookies and how to use cookies in jsp. Cookie is encapsulated in javax.servlet.http.Cookie.
Create cookies:
Cookie c=new Cookie(“CookieName”,”CookieValue”);
response.addCookie(c);
Retrieve cookies:
Cookie[ ] display=request.getCookies();
Kill cookies:
Problem:
There are three files. 1). cookie.jsp 2). cookie2.jsp 3). cookie3.jsp
cookie.jsp have one text box to get firstname and click OK the control goes to cookie2.jsp. cookie2.jsp have one text box to get lastname and click OK the control goes to cookie3.jsp. where we will display first name and last name .
Screen shot:
cookie.jsp
cookie2.jsp
cookie3.jsp
Procedure:
Step 1:
Create Project named as CookiesPro
Step 2:
Create Folder named as jsp
Step 3:
3.1). Create jsp file named as cookie.jsp
< %@page contentType="text/html" pageEncoding="UTF-8"% >
< !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
http://www.w3.org/TR/html4/loose.dtd >
< html >
< head >
< title > JSP-Cookie Example < /title >
< /head >
< body >
< b > Cookie Example < /b >
< br > < br >
< form action="http://localhost:8084/CookiesPro/jsp/cookie2.jsp" method="post" >
First Name: < input type="text" name="fname"/ > < br >
< input type="submit" value="OK"/ >
< /form >
< /body >
< /html >
3.2). Create another jsp file named as cookie2.jsp
< %@page contentType="text/html" pageEncoding="UTF-8"% >
< !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
http://www.w3.org/TR/html4/loose.dtd >
< html >
< head >
< title > JSP-Cookie Example < /title >
< /head >
< body >
< b > Cookie Example < /b > < br >
< %
String fname=request.getParameter("fname");
%>
< %
Cookie c=new Cookie("firstname",fname);
response.addCookie(c);
% >
< form action="http://localhost:8084/CookiesPro/jsp/cookie3.jsp" method="post" >
Last Name < input type="text" name="lname"/ > < br >
< input type="submit" value="OK"/ >
< /form >
< /body >
< html >
3.3). Create another jsp file named as cookie3.jsp
< %@page contentType="text/html" pageEncoding="UTF-8"% >
< !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
http://www.w3.org/TR/html4/loose.dtd >
< html >
< head >
< title > JSP-Cookie Example < /title >
< /head >
< body >
< b > Cookie Example < /b >
< %
String lname=request.getParameter("lname");
% >
< %
Cookie c1=new Cookie("lastname", lname);
response.addCookie(c1);
% >
< form action="http://localhost:8084/CookiesPro/jsp/display.jsp" method="post" >
< input type="submit" value="OK"/ >
< /form >
< /body >
< /html >
3.4). Create another jsp file named as display.jsp
< %@page contentType="text/html" pageEncoding="UTF-8"% >
< !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
http://www.w3.org/TR/html4/loose.dtd >
< html >
< head >
< title > JSP-Display all Cookie < /title >
< /head >
< body >
< %
Cookie[] dis=request.getCookies();
for(int i=0;i
{
out.println(dis[i].getName()+":"+dis[i].getValue());
out.println("");
% >
< br >
< %
}
% >
< /body >
< /html >
Step 4:
Run the cookie.jsp
Suresh as Firstname
Kumar as Lastname
Step 5:
Get output
Structure of CookiePro
