如何删除Java Servlet中的Cookie [英] How do you remove a Cookie in a Java Servlet

问题描述

如何删除Java servlet中的Cookie？

How do you remove a cookie in a Java servlet?

我尝试过：
http://www.jguru.com/faq/view.jsp?EID=42225

编辑：以下现在工作成功，它似乎是以下的组合：

The following now works successfully it appears to be the combination of:

response.setContentType("text/html");

和

cookie.setMaxAge(0);

在我做之前：

//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);

当浏览器关闭时，会过期Cookie 文档。

Which expires the cookie when the browser is closed as per the documentation.

负值意味着cookie不会持久存储，并且会在Web浏览器退出时被删除。零值导致cookie被删除。

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.

到期的完整工作程式码片段是：

The full working snippet to expire a cookie is:

//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);

推荐答案

MaxAge of -1表示您想要Cookie持续会话的持续时间。您要将MaxAge设置为0。

The MaxAge of -1 signals that you want the cookie to persist for the duration of the session. You want to set MaxAge to 0 instead.

从 API文档：

负值表示Cookie不会持久存储，并且会在Web浏览器退出时被删除。零值导致cookie被删除。

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.

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