There is no Action mapped for namespace / and action name AjaxServlet.
There is no Action mapped for namespace / and action name AjaxServlet. -原因：web.xml中配置struts拦截为/*，AjaxServlet被拦截掉
<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>
<servlet>
<description></description>
<display-name>AjaxServlet</display-name>
<servlet-name>AjaxServlet</servlet-name>
<servlet-class>org.CollegePro.ssh.web.servlet.AjaxServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>AjaxServlet</servlet-name>
<url-pattern>/AjaxServlet</url-pattern>
</servlet-mapping>
解决办法：修改struts的过滤器设置，如下。只对.aciton结尾的请求和.jsp结尾请求过滤，这样就可以保证Ajax的过滤器能正常使用。
<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>*.action</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
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