Question

在web.xml中配置多个filter是怎么执行的

Answer 1

web.xml的部分配置文件：
<!--配置的filter-->
<filter>
<filter-name>struts2Filter</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<!-- UrlRewrite filter -->
<filter>
<filter-name>urlRewriteFilter</filter-name>
<filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class>
</filter>

<!--配置的filtermapping-->
<filter-mapping>
<filter-name>struts2Filter</filter-name>
<url-pattern>*.action</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
</filter-mapping>

<filter-mapping>
<filter-name>urlRewriteFilter</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
</filter-mapping>
filter的执行类似于栈，执行顺序是按照在配置文件中配置的顺序执行的，比如定义两个filter（f1,f2），过滤的对象为index.jsp，则客户的请求(req)和响应(res)顺序是req->f1->f2>index.jsp->f2->f1->res。

Answer 2

你不用.*去匹配就是了。用不同名字，在request里的action请求对应名称的servlet