struts2错误：The Struts dispatcher cannot be found.

最新推荐文章于 2019-12-27 14:25:53 发布

冬虫999

最新推荐文章于 2019-12-27 14:25:53 发布

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文章标签： filter Filter servlet Servlet struts Struts tags

本文链接：https://blog.youkuaiyun.com/jelly_999/article/details/8465491

本文介绍了解决Struts2框架中使用标签时找不到dispatcher的问题。通过在配置文件中添加针对.jsp文件的过滤规则，确保请求能正确通过Struts2的servlet filter，从而初始化所需的dispatcher。

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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. - [unknown location]
at org.apache.struts2.views.jsp.TagUtils.getStack(TagUtils.java:60)
at org.apache.struts2.views.jsp.StrutsBodyTagSupport.getStack(StrutsBodyTagSupport.java:44)
at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:48)
at org.apache.jsp.message._404_jsp._jspService(_404_jsp.java:159)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)

解决办法：加了标签后，出现此问题
其实最后只在原配置基础上加上.jsp过滤即可
<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>