【java struts2】Filters vs Interceptors in Struts 2

最新推荐文章于 2025-09-12 18:08:49 发布

转载最新推荐文章于 2025-09-12 18:08:49 发布 · 49 阅读

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原文链接：http://www.cnblogs.com/m3Lee/p/3477157.html

文章标签：

#java #web.xml

本文详细解析了Struts2框架中拦截器与过滤器的区别：拦截器为Struts2特有，用于环绕Struts2动作的处理；而过滤器属于Servlet规范的一部分，适用于更广泛的请求处理场景。此外，还介绍了Struts2框架部署时所使用的过滤器配置。

The most significant difference is that "interceptors" are a part of the Struts 2 framework, and are only part of the request handling that is done by the Struts 2 framework. "Filters" on the other hand are a part of the Servlet Specifcation; in other words, they are part of the Servlet API. If you are using Struts 2, you should use interceptors for wrapping functionality around your Struts 2 actions. If you are trying to wrap functionality around requests coming to your webapp, but not being handled by Struts 2, then a filter might be more appropriate.

BTW, the entire Struts 2 Framework is deployed inside a filter configured in your web app, declared in your webapp's deployment descriptor ( web.xml ) like:

<filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>

     <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

　　This filter, which is configured to catch all requests URL patterns, is the entry point into the entire Struts 2 framework.

转载于:https://www.cnblogs.com/m3Lee/p/3477157.html