java - 强制先执行 "WebFilter"

Question

考虑我的 web.xml 中的以下过滤器映射

<filter-mapping>
    <filter-name>rememberMeCookieFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
    <filter-name>mustBeSignedInFilter</filter-name>
    <url-pattern>/private/*</url-pattern>
</filter-mapping>

据我从我所做的测试中了解到，如果我转到 /private/account.jsp，则 MustBeSignedInFilter 将始终首先执行( from what I could read, it's because the path is more specific )。我需要首先执行rememberMeCookieFilter。

我该怎么做？

Answer 1

您将过滤器映射与 servlet 映射混淆了。与 URL 匹配的所有过滤器都按照 web.xml 中指定的过滤器映射的顺序执行。因此，交换过滤器映射，它将按您的预期工作。

<filter-mapping>
    <filter-name>mustBeSignedInFilter</filter-name>
    <url-pattern>/private/*</url-pattern>
</filter-mapping>
<filter-mapping>
    <filter-name>rememberMeCookieFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>