servlet3.0 @webfilter 过滤顺序

Posted 2020-10-05 规格严格-功夫到家-哈工大威海人

Servlet3.0之前Filter过滤的顺序是由用户在web.xml中配置的顺序决定的，如下会先执行encodingFilter,再执行filter1.

 

[java] view plain copy

1. <filter>  
2.     <display-name>encodingFilter</display-name>  
3.     <filter-name>EncodingFilter</filter-name>  
4.     <filter-class>com.saber.domain.EncodingFilter</filter-class>  
5. </filter>  
6.   
7. <filter-mapping>  
8.   <filter-name>encodingFilter</filter-name>  
9.   <url-pattern>/*</url-pattern>  
10. </filter-mapping>  
11. <filter>  
12.     <display-name>filter1</display-name>  
13.     <filter-name>filter1</filter-name>  
14.     <filter-class>com.saber.domain.Filter1</filter-class>  
15. </filter>  
16.   
17. <filter-mapping>  
18.   <filter-name><span style="font-family: Arial, Helvetica, sans-serif;">filter1</span><span style="font-family: Arial, Helvetica, sans-serif;"></filter-name></span>  
19.   <url-pattern>/*</url-pattern>  
20. </filter-mapping>  

 

在3.0之后新增@WebFilter注解，当使用注解配置多个Filter时，用户无法控制其执行顺序，此时Filter过滤的顺序是按照Filter的类名来控制的，按自然排序的规则。