org.apache.struts.taglib.TagUtils.retrieveMessageResource

今天使用<bean:message />标签的时候出现如下错误:

 

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: java.lang.NullPointerException
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:500)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:428)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

 

root cause

java.lang.NullPointerException
	org.apache.struts.taglib.TagUtils.retrieveMessageResources(TagUtils.java:1175)
	org.apache.struts.taglib.TagUtils.message(TagUtils.java:1038)
	org.apache.struts.taglib.bean.MessageTag.doStartTag(MessageTag.java:224)
	org.apache.jsp.index_jsp._jspx_meth_bean_005fmessage_005f0(index_jsp.java:292)
	org.apache.jsp.index_jsp._jspService(index_jsp.java:157)
	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:386)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

 

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.32 logs.

---

Apache Tomcat/6.0.32

1. 检查过web.xml

 

 <taglib>
	    <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
	    <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
	  </taglib>

 

2. 检查struts-config.xml

 

<message-resources parameter="com.iteye.jarg.conf.ApplicationResources" />

 

3. 检查jsp页面

 

<%@taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>

<bean:message key="login.success" />

 

 4. 检查ApplicationResources,也有login.success项.

 

都没有问题,网上(http://www.blogjava.net/hilinw/archive/2010/03/11/315210.html)查好久才知道web.xml配置文件中未设置<load-on-startup>1</load-on-startup>