我有一个 JSP，它使用<s:action>标签调用一个动作：
<s:form>
<s:action name="myaction"
namespace="/utente/include" executeResult="true"
ignoreContextParams="true" var="formattazione" />
//do something
</s:form>
调用动作myaction，我可以按照流程调试它。它完成得很好，没有错误，它返回成功，但是有一个错误，我不明白是哪一个。
动作定义：
<package name="utente-include" namespace="/utente/include" extends="tiles-default">
<action name="myaction" class="com.emaborsa.doctracing.web.action.formattazione.FormattazioneCriteriUtenteAction"
method="formattazione">
<result type="tiles">mytiles.def</result>
</action>
</package>
瓷砖定义：
<definition name="mytiles.def" template="/pages/empty.jsp">
<put-attribute name="body" value="/pages/mypage.jsp"/>
</definition>
空的.jsp：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles" %>
<tiles:insertAttribute name="body" />
例外：
GRAVE: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:49)
at org.apache.jsp.pages.utente.elencoUtenti_jsp._jspx_meth_s_005fif_005f0(elencoUtenti_jsp.java:215)
at org.apache.jsp.pages.utente.elencoUtenti_jsp._jspx_meth_s_005fform_005f0(elencoUtenti_jsp.java:155)
at org.apache.jsp.pages.utente.elencoUtenti_jsp._jspService(elencoUtenti_jsp.java:87)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
.....
编辑：
我认为它有效，但它没有。实际上系统并没有崩溃，但是邮件页面中没有包含tiles-page。我得到的例外：
org.apache.tiles.impl.CannotRenderException: No request dispatcher returned for path '/../pages/common/myPage.jsp'
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:680)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:633)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:322)
at org.apache.struts2.views.tiles.TilesResult.doExecute(TilesResult.java:105)
at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:361)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:265)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:163)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
这里是我的 myPage.jsp（实际上写什么并不重要）：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<div class="navigazioneElenco" id="navigazioneElenco">
</div>
在这里，我分享我的项目的一部分。只有部分不工作... 下载