Saturday, 15th October 2011
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Read a Cookie from a servlet

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This article contains a simple Servlet that prints out all the cookies sent from the client with the HTTP request.

Contents

the article

This example uses the: 

Cookie[] request.getCookies()

and 

Cookie.getName() 
Cookie.getValue()

to retrieve the cookies information from the request object.

MyServlet 

import javax.servlet.*;
import javax.servlet.http.*;
 
public class MyServlet extends HttpServlet {
  public void doPost
    (HttpServletRequest req, HttpServletResponse res) {
     Cookie[] theCookies = request.getCookies();
     if (theCookies != null) {
        java.io.PrintWriter out = res.getWriter();
        for (int i =0; i< cookies.length; i++) {
           Cookie aCookie = theCookies[i];
           out.println 
             ("Name : " + aCookie.getName() 
               + " Value: " + aCookie.getValue());
           }
        }
    }
 
  public void doGet(HttpServletRequest req, HttpServletResponse res) {
    doPost(req, res);
    }
 
}

See Also

Real's Java How To

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