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POHow do you remove a Cookie in a Java Servlet
 

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    <p>How do you remove a cookie in a Java servlet?</p> <p>I tried this: <a href="http://www.jguru.com/faq/view.jsp?EID=42225" rel="noreferrer">http://www.jguru.com/faq/view.jsp?EID=42225</a></p> <p>EDIT: The following now works successfully it appears to be the combination of:</p> <pre><code>response.setContentType("text/html"); </code></pre> <p>and</p> <pre><code>cookie.setMaxAge(0); </code></pre> <p>Before I was doing:</p> <pre><code>//remove single signon cookie if it hasn't been validated yet response.setContentType("text/html"); Cookie cookie = new Cookie(SSORealm.SSO_COOKIE_NAME, ""); cookie.setDomain(SSORealm.SSO_DOMAIN); cookie.setMaxAge(-1); cookie.setPath("/"); cookie.setComment("EXPIRING COOKIE at " + System.currentTimeMillis()); response.addCookie(cookie); </code></pre> <p>Which expires the cookie when the browser is closed as per <a href="http://docs.oracle.com/javaee/6/api/javax/servlet/http/Cookie.html#setMaxAge%28int%29" rel="noreferrer">the documentation</a>.</p> <blockquote> <p>A negative value means that the cookie is not stored persistently and will be deleted when the Web browser exits. A zero value causes the cookie to be deleted. </p> </blockquote> <p>The full working snippet to expire a cookie is:</p> <pre><code>//remove single signon cookie if it hasn't been validated yet response.setContentType("text/html"); Cookie cookie = new Cookie(SSORealm.SSO_COOKIE_NAME, ""); cookie.setDomain(SSORealm.SSO_DOMAIN); cookie.setMaxAge(0); cookie.setPath("/"); cookie.setComment("EXPIRING COOKIE at " + System.currentTimeMillis()); response.addCookie(cookie); </code></pre>
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