为什么我的JSP不会删除Cookie

Question

I want to delete a cookie in my login page, no matter what I do, it just won't go away. in chrome developer, it shows the response from the server contains no cookie even though I had add it using response.addCookie() .

Here's the JSP code that removes the code. It's at the beginning of the page, right after the content-type being set and before any output. this JSP is in the tile view (not sure if it makes any difference). I also tried moving this code to the containing JSP, but no help either.

<%@ page contentType="text/html; charset=UTF-8" %>
<%
// remove cookie.  all the properties (domain, path secure) match those those when   the cookie was being created and set.
Cookie ck = new Cookie(someName,"");
ck.setMaxAge(0);
ck.setValue("");
ck.setPath("/");
ck.setDomain(someDomain);
    ck.setSecure(true);
response.addCookie(ck);
System.out.println("wwwwwww 999991111");
%>

thanks.

Answer 1

Use

cookie.setPath(request.getContextPath());

your code only works if the application is deployed to the root.