环境:struts2
操作：struts2中直接访问jsp
异常：The Struts dispatcher cannot be found.? This is usually caused by using Struts tags without the associated filter. Struts tags are only usable when the request has passed through its servlet filter, which initializes the Struts dispatcher needed for this tag.
原因：如果想要在jsp文件中，采用 struts的tag，那么jsp必须是通过action跳转得到，也就是必须通过web.xml所配置的过滤器访问文件，否则会有异常。
?
解决：
(1)
?<filter-mapping>
??<filter-name>struts2</filter-name>
??<url-pattern>*.action</url-pattern>
??<url-pattern>*.jsp</url-pattern>
?</filter-mapping>
(2)
?<filter-mapping>
??<filter-name>struts2</filter-name>
??<url-pattern>/*</url-pattern>
?</filter-mapping>
(3)
配置通用操作：
<action name="*">
???? <result>/{1}.jsp</result>
??</action>
以前访问jsp的操作换成action的操作：eg: 原来 test.jsp 先在test.action