主题 : 求助!freammarker报错 怎么解决
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1#   发表于:2016-09-27 08:43:23  IP:123.10.*.*
我写的代码<dl  data-src="${a.mediaPath}">;
报错:
==> a.mediaPath  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 116, column 42]

Tip: If the failing expression is known to be legally null/missing, either specify a default value with myOptionalVar!myDefault, or use [#if myOptionalVar??]when-present[#else]when-missing[/#if]. (These only cover the last step of the expression; to cover the whole expression, use parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)??

The failing instruction (print stack trace for 2 more):
==> ${a.mediaPath}  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 116, column 40]] with root cause
FreeMarker template error:
The following has evaluated to null or missing:
==> a.mediaPath  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 116, column 42]

Tip: If the failing expression is known to be legally null/missing, either specify a default value with myOptionalVar!myDefault, or use [#if myOptionalVar??]when-present[#else]when-missing[/#if]. (These only cover the last step of the expression; to cover the whole expression, use parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)??

The failing instruction (FTL stack trace):
----------
==> ${a.mediaPath}  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 116, column 40]
    #else  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 115, column 26]
    @cms_content_list count="\${channel.p...  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 111, column 25]
----------

Java stack trace (for programmers):
----------
freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...]
        at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:98)
        at freemarker.core.EvalUtil.coerceModelToString(EvalUtil.java:382)
        at freemarker.core.Expression.evalAndCoerceToString(Expression.java:115)
        at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.MixedContent.accept(MixedContent.java:93)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.IfBlock.accept(IfBlock.java:84)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.MixedContent.accept(MixedContent.java:93)
        at freemarker.core.Environment.visitByHiddingParent(Environment.java:286)
        at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:193)
        at freemarker.core.Environment.visitIteratorBlock(Environment.java:509)
        at freemarker.core.IteratorBlock.accept(IteratorBlock.java:103)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.Environment$1.render(Environment.java:313)
        at com.jeecms.cms.action.directive.ContentListDirective.execute(ContentListDirective.java:70)
        at freemarker.core.Environment.visit(Environment.java:341)
        at freemarker.core.UnifiedCall.accept(UnifiedCall.java:136)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.MixedContent.accept(MixedContent.java:93)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.Environment.process(Environment.java:243)
        at freemarker.template.Template.process(Template.java:277)
        at com.jeecms.common.web.springmvc.SimpleFreeMarkerView.renderMergedTemplateModel(SimpleFreeMarkerView.java:111)
        at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167)
        at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:263)
        at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
        at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.jeecms.common.web.XssFilter.doFilter(XssFilter.java:50)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
        at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
        at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
        at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
        at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
        at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
        at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:264)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:230)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.jeecms.common.web.ProcessTimeFilter.doFilter(ProcessTimeFilter.java:35)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1082)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)

Sep 27, 2016 8:34:04 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [JeeCmsFront] in context with path [] threw exception [Request processing failed; nested exception is freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> a.mediaPath  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 116, column 42]

Tip: If the failing expression is known to be legally null/missing, either specify a default value with myOptionalVar!myDefault, or use [#if myOptionalVar??]when-present[#else]when-missing[/#if]. (These only cover the last step of the expression; to cover the whole expression, use parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)??

The failing instruction (print stack trace for 2 more):
==> ${a.mediaPath}  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 116, column 40]] with root cause
FreeMarker template error:
The following has evaluated to null or missing:
==> a.mediaPath  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 116, column 42]

Tip: If the failing expression is known to be legally null/missing, either specify a default value with myOptionalVar!myDefault, or use [#if myOptionalVar??]when-present[#else]when-missing[/#if]. (These only cover the last step of the expression; to cover the whole expression, use parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)??

The failing instruction (FTL stack trace):
----------
==> ${a.mediaPath}  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 116, column 40]
    #else  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 115, column 26]
    @cms_content_list count="\${channel.p...  [in template "WEB-INF/t/cms/www/default/content/vedio.html" at line 111, column 25]
----------

Java stack trace (for programmers):
----------
freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...]
        at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:98)
        at freemarker.core.EvalUtil.coerceModelToString(EvalUtil.java:382)
        at freemarker.core.Expression.evalAndCoerceToString(Expression.java:115)
        at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.MixedContent.accept(MixedContent.java:93)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.IfBlock.accept(IfBlock.java:84)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.MixedContent.accept(MixedContent.java:93)
        at freemarker.core.Environment.visitByHiddingParent(Environment.java:286)
        at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:193)
        at freemarker.core.Environment.visitIteratorBlock(Environment.java:509)
        at freemarker.core.IteratorBlock.accept(IteratorBlock.java:103)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.Environment$1.render(Environment.java:313)
        at com.jeecms.cms.action.directive.ContentListDirective.execute(ContentListDirective.java:70)
        at freemarker.core.Environment.visit(Environment.java:341)
        at freemarker.core.UnifiedCall.accept(UnifiedCall.java:136)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.MixedContent.accept(MixedContent.java:93)
        at freemarker.core.Environment.visit(Environment.java:265)
        at freemarker.core.Environment.process(Environment.java:243)
        at freemarker.template.Template.process(Template.java:277)
        at com.jeecms.common.web.springmvc.SimpleFreeMarkerView.renderMergedTemplateModel(SimpleFreeMarkerView.java:111)
        at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167)
        at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:263)
        at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
        at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.jeecms.common.web.XssFilter.doFilter(XssFilter.java:50)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
        at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
        at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
        at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
        at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
        at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
        at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:264)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:230)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.jeecms.common.web.ProcessTimeFilter.doFilter(ProcessTimeFilter.java:35)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1082)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)
级别: 版主
UID: 70293
积分:78391 加为好友
威望: 1 精华: 0
主题:7 回复:68397
注册时间:2014-12-03
在线时长:0
2#   发表于:2016-09-27 08:45:01  IP:220.67.*.*
src="${content.mediaPath!}"
1
级别: 解元
UID: 90168
积分:239 加为好友
威望: 25 精华: 0
主题:39 回复:96
注册时间:2016-06-27
在线时长:0
3#   发表于:2016-09-27 08:45:57  IP:123.10.*.*
回复第2楼
多谢
级别: 版主
UID: 70293
积分:78391 加为好友
威望: 1 精华: 0
主题:7 回复:68397
注册时间:2014-12-03
在线时长:0
4#   发表于:2016-09-27 08:47:25  IP:220.67.*.*
1
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