本文详细介绍了在web.xml中添加Struts2 Filter的方法，解决Struts2标签无法使用的问题，确保应用正常运行。
1.The Struts dispatcher cannot be found. This is usually caused by using Struts tags without the associated filter. Strut
2.s tags are only usable when the request has passed through its servlet filter, which initializes the Struts dispatcher n
3.eeded for this tag. - [unknown location]
解决：
web.xml 中添加一个filter
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/action/*</url-pattern>
</filter-mapping>
2.s tags are only usable when the request has passed through its servlet filter, which initializes the Struts dispatcher n
3.eeded for this tag. - [unknown location]
解决：
web.xml 中添加一个filter
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/action/*</url-pattern>
</filter-mapping>
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