不知道能不能解决
<%@ page contentType="text/html;charset=GB2312" language="java" %>
<%@ taglib uri="Struts-Html" prefix="html" %>
<%@ taglib uri="Struts-Bean" prefix="bean" %>
<%@ taglib uri="Struts-Logic" prefix="logic" %>
<html:html locale="true">
<head>
<title><bean:message key="hello.jsp.title"/></title>
<html:base/>
</head>
<body>
<p><h2><bean:message key="hello.jsp.page.heading"/></h2></p>
<p><html:errors/></p>
<logic:present name="ch03.hello" scope="request">
<h2>
Hello <bean:write name="ch03.hello.HelloForm" property="person" />!
</h2>
</logic:present>
<html:form action="/HelloWorld.do?action=goName" focus="person">
<bean:message key="hello.jsp.prompt.person"/>
<html:text property="person" size="16" maxlength="16"/><br>
<html:submit property="submit" value="submit"/>
<html:reset/>
</html:form><br>
<html:img page="/struts-power.gif" alt="Powered by Struts" />
</body>
</html:html>
异常信息:
exception
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
root cause
java.lang.NullPointerException
org.apache.struts.taglib.TagUtils.retrieveMessageResources(TagUtils.java:1219)
org.apache.struts.taglib.TagUtils.message(TagUtils.java:1082)
org.apache.struts.taglib.bean.MessageTag.doStartTag(MessageTag.java:226)
org.apache.jsp.hello_jsp._jspx_meth_bean_message_0(org.apache.jsp.hello_jsp:173)
org.apache.jsp.hello_jsp._jspx_meth_html_html_0(org.apache.jsp.hello_jsp:123)
org.apache.jsp.hello_jsp._jspService(org.apache.jsp.hello_jsp:94)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.
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NullPointerException
是空指针错误，你的某个地方没判断是否为空。
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变量初始化问题，变量为null的问题。
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好像是这里的问题：
<%@ taglib uri="Struts-Html" prefix="html" %>
