struts2错误：The Struts dispatcher cannot be found.

最新推荐文章于 2020-10-09 13:07:52 发布

longyuan20102011

最新推荐文章于 2020-10-09 13:07:52 发布

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分类专栏： struts 文章标签： struts filter servlet tags

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在使用Struts2框架时遇到视图标签无法使用的问题，通过添加相应的过滤器解决了请求未经过Servlet过滤器导致的StrutsDispatcher初始化失败的情况。解决步骤包括配置过滤器并映射到特定的URL模式。

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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>