如题,
我现在用Liferay 写了个关于Struts的例子，老是出错。就是，当登陆后，一点 添加内容后，就报错了。
我在languages-ext.properties中也添加过title。
java.lang.NullPointerException
at com.liferay.portlet.PortletConfigImpl.getResourceBundle(PortletConfig
Impl.java:147)
at com.liferay.portal.util.PortalUtil.getPortletTitle(PortalUtil.java:61
8)
at com.liferay.portal.util.comparator.PortletTitleComparator.compare(Por
tletTitleComparator.java:57)
at java.util.Arrays.mergeSort(Arrays.java:1278)
at java.util.Arrays.mergeSort(Arrays.java:1289)
at java.util.Arrays.sort(Arrays.java:1219)
at java.util.Collections.sort(Collections.java:155)
at org.apache.jsp.html.portlet.layout_005fconfiguration.view_005fcategor
y_jsp._jspService(view_005fcategory_jsp.java:422)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:332)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
14)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDisp
atcher.java:672)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationD
ispatcher.java:574)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDis
patcher.java:499)
at com.liferay.taglib.util.IncludeTag.doEndTag(IncludeTag.java:63)
at org.apache.jsp.html.portlet.layout_005fconfiguration.view_jsp._jspx_m
eth_liferay$1util_include_0(view_jsp.java:535)
at org.apache.jsp.html.portlet.layout_005fconfiguration.view_jsp._jspSer
vice(view_jsp.java:432)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:332)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
14)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDisp
atcher.java:672)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationD
ispatcher.java:574)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDis
patcher.java:499)
at com.liferay.taglib.util.IncludeTag.doEndTag(IncludeTag.java:63)
at org.apache.jsp.html.common.themes.portlet_jsp._jspService(portlet_jsp
.java:2571)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:332)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
14)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDisp
atcher.java:672)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationD
ispatcher.java:574)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDis
patcher.java:499)
at com.liferay.portlet.PortletRequestDispatcherImpl.include(PortletReque
stDispatcherImpl.java:237)
at com.liferay.portal.struts.PortletRequestProcessor.doInclude(PortletRe
questProcessor.java:439)
at com.liferay.portal.struts.PortletRequestProcessor.doForward(PortletRe
questProcessor.java:414)



然后就是这么一大堆。我就是按着例子一步一步的写的。就是不行。连找错我都不知从何下手。
哪位指点一下。

我也发现过这问题，后发现是view.jsp文件写成了view.jap,用ant deploy，重新发布，就好了

唯一要检查的就是配置文件，肯定写错了某个地方。建议你直接拷贝例子中的配置的写法。我也碰到过，是一个配置文件写的有点问题，改了然后deploy就好了。

在 portlet-ext.xml 中把<resource-bundle> com.liferay.portlet.StrutsResourceBundle
</resource-bundle>写成一行。我的是4.2。昏迷中。。。。改完了虽然控制台还报错，但是界面已经能出来了。参见 https://www.liferay.com/web/guest/community/forums/message_boards/message/155212