servlet3.0 @webfilter 过滤顺序

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.

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