过滤器的<filter-mapping>能不能这样写？

Question

<filter-mapping>
<filter-name>adminfilter</filter-name>
<url-pattern>*.jsp, *.action</url-pattern>
</filter-mapping>请问我能不能这样写？

Answer 1

不能这样写要如下写：
<filter-mapping>
<filter-name>adminfilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>adminfilter</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>也是就是说：一个filter可以有多个filter-mapping

Answer 2

<url-pattern>*.jsp, *.action</url-pattern>url-pattern用的是正则匹配原则，你这个正则是什么意思？

Answer 3

<filter-mapping>
    <filter-name>adminfilter</filter-name>
    <url-pattern>/*.jsp</url-pattern>
    <url-pattern>/*.action</url-pattern>
</filter-mapping>

Answer 4

正解，要匹配多个可以用多个mapping来过滤