In a Java Servlet how can I change the value of an existing cookie?

Question

In a Java Servlet how can I change the value of an existing cookie? There is an addCookie method, but no deleteCookie or editCookie in HttpServletResponse

Answer 1

Here is an example from kodejava:

 public class ReadCookieExample extends HttpServlet {
 protected void doPost(HttpServletRequest request, HttpServletResponse   response)         throws    ServletException, IOException {
    response.setContentType("text/html");
    PrintWriter writer = response.getWriter();

    Cookie[] cookies = request.getCookies();
    for (int i = 0; i < cookies.length; i++) {
        writer.println("Name: " + cookies[i].getName() + "; Value: "                    +                   cookies[i].getValue());            
    }
}

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

}

That will get the cookies list, get the one you want and instead of printing out values, do something similar to this:

 cookie.setValue(String.valueOf());  
 cookie.setMaxAge(60*60*24*365);   
 cookie.setPath("/");   
 response.addCookie(cookie);  etc...

HTH,

James