The Struts dispatcher cannot be found.

最新推荐文章于 2019-12-27 14:25:53 发布

原创最新推荐文章于 2019-12-27 14:25:53 发布 · 1.3w 阅读

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#struts #servlet #tags #filter #jsp #server

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本文分析了HTTP状态码500错误中的Struts框架异常情况，指出该问题通常由未正确配置Struts过滤器引起，并提供了两种解决办法：确保JSP页面已加载Struts标签库及设置拦截器模式为/*。

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: 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] org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

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] org.apache.struts2.views.jsp.TagUtils.getStack(TagUtils.java:60) org.apache.struts2.views.jsp.StrutsBodyTagSupport.getStack(StrutsBodyTagSupport.java:52) org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:49) org.apache.jsp.index_jsp._jspx_meth_s_005ftextfield_005f0(index_jsp.java:122) org.apache.jsp.index_jsp._jspService(index_jsp.java:93) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

（1）JSP页面中没有加入类似下面内容：

<%@ taglib prefix="s" uri="/struts-tags"%>

（2）拦截器不是/*

<filter-mapping>
   <filter-name>struts2</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>