多个Filter 的执行顺序

如果在WEB.XML中有多个Filter,则执行顺序为

<filter-mapping>的顺序

 

<filter-mapping>

<filter-name>secondFilter</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<filter-mapping>

<filter-name>sysoutFilter</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

 

执行顺序为 secondFilter, sysoutFilter

 

Configuring a Chain of Filters

WebLogic Server creates a chain of filters by creating a list of all the filter mappings that match an incoming HTTP request. The ordering of the list is determined by the following sequence:

1. • Filters where the filter-mapping element contains a url-pattern that matches the request are added to the chain in the order they appear in the web.xml deployment descriptor.
   • Filters where the filter-mapping element contains a servlet-name that matches the request are added to the chain after the filters that match a URL pattern.
   • The last item in the chain is always the originally requested resource.

In your filter class, use the FilterChain.doFilter() method to invoke the next item in the chain.