cookies

[gourakk]

iam trying to work with cookies. i simply wrote two statements.
Cookie usercookie=new Cookie("user", user);
response.addCookie(usercookie);

will this work? or should i need to write getCookies() method also. where i need to write it and wat else i have to write?

[r035198x]

iam trying to work with cookies. i simply wrote two statements.
Cookie usercookie=new Cookie("user", user);
response.addCookie(usercookie);

will this work? or should i need to write getCookies() method also. where i need to write it and wat else i have to write?

here is an example.

[abctech]

iam trying to work with cookies. i simply wrote two statements.
Cookie usercookie=new Cookie("user", user);
response.addCookie(usercookie);

will this work? or should i need to write getCookies() method also. where i need to write it and wat else i have to write?

Hi,
Below is a simple demo of storing and retrieving Cookies(Session Cookies) using 2 Servlets :-

Program 1 :- CookieDemo1.java

 //Servlet CookieDemo1 is setting the Cookie 
 
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
 
public class CookieDemo1 extends HttpServlet
{
 
    public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
    {
 
        response.setContentType("text/html");
        PrintWriter pw = response.getWriter();
 
        String user = "gourakk" ;
 
// Instantiate a new Cookie object and to store info in it call the Cookie constructor, it takes 2 parameters,viz (name of cookie-String,value of cookie-String)
 
        Cookie usercookie = new Cookie("user",user); 
        response.addCookie(usercookie); //adding the cookie to the response, the addCookie() takes the cookie-obj as an argument and stores that cookie on the client m/c
 
        pw.println("Cookie " + user + " is stored on your machine" ) ;
 
    }
 
};
 
Program 2 :- CookieDemo2.java
//servlet CookieDemo2 is getting the Cookie set by Servlet CookieDemo1
 
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
 
public class CookieDemo2 extends HttpServlet
{
 
    public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
    {
 
        response.setContentType("text/html");
        PrintWriter pw = response.getWriter();        
 
// To get info from a cookie one can call the method getCookies() on the request object
 
        Cookie c[] = request.getCookies();
 
        if (c!=null)
        {
            for (int i=0;i<c.length;i++ )
            {
                String s = c[i].getName(); //getName() returns name of the Cookie
 
                if (s.equals("user")) //'user' is the name u'd given to ur Cookie in the Demo1 servlet
                {
                    String t = c[i].getValue(); //getValue() returns the value of that Cookie
                    pw.println("Hi the cookie value is: " + t);
                }        
 
            }
        }
 
        else
            pw.println("No Cookies found");
    }
 
};
 

Compile the above 2 servlets(they are 2 seperate files),deploy Demo1 first then Demo2, and check the o/p in your browser again by calling Servlet1 first and then from the same browser itself call the second Servlet