刚刚部署完就报错，不知道什么问题
<a href="${content.url}" target="_blank"><@text_cut s=content.title?html len=25 append="..."/></a>
报错如下：
freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> content.title [in template "jeecms_sys/content/list.html" at line 436, column 71]
Tip: If the failing expression is known to be legally null/missing, either specify a default value with myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)??
The failing instruction (print stack trace for 5 more):
==> @text_cut s=content.title?html len=25... [in template "jeecms_sys/content/list.html" at line 436, column 58]
at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:98) ~[freemarker.jar:2.3.20]
at freemarker.core.EvalUtil.coerceModelToString(EvalUtil.java:382) ~[freemarker.jar:2.3.20]
at freemarker.core.Expression.evalAndCoerceToString(Expression.java:115) ~[freemarker.jar:2.3.20]
at freemarker.core.StringBuiltins$StringBuiltIn._eval(StringBuiltins.java:87) ~[freemarker.jar:2.3.20]
at freemarker.core.Expression.eval(Expression.java:111) ~[freemarker.jar:2.3.20]
at freemarker.core.UnifiedCall.accept(UnifiedCall.java:129) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.MixedContent.accept(MixedContent.java:93) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:487) [freemarker.jar:2.3.20]
at freemarker.core.BodyInstruction.accept(BodyInstruction.java:93) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.MixedContent.accept(MixedContent.java:93) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.IfBlock.accept(IfBlock.java:84) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.MixedContent.accept(MixedContent.java:93) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.Macro$Context.runMacro(Macro.java:209) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:694) [freemarker.jar:2.3.20]
at freemarker.core.UnifiedCall.accept(UnifiedCall.java:116) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.MixedContent.accept(MixedContent.java:93) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:487) [freemarker.jar:2.3.20]
at freemarker.core.BodyInstruction.accept(BodyInstruction.java:93) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.MixedContent.accept(MixedContent.java:93) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visitByHiddingParent(Environment.java:286) [freemarker.jar:2.3.20]
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:193) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visitIteratorBlock(Environment.java:509) [freemarker.jar:2.3.20]
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:103) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.MixedContent.accept(MixedContent.java:93) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.Macro$Context.runMacro(Macro.java:209) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:694) [freemarker.jar:2.3.20]
at freemarker.core.UnifiedCall.accept(UnifiedCall.java:116) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.MixedContent.accept(MixedContent.java:93) [freemarker.jar:2.3.20]
at freemarker.core.Environment.visit(Environment.java:265) [freemarker.jar:2.3.20]
at freemarker.core.Environment.process(Environment.java:243) [freemarker.jar:2.3.20]
at freemarker.template.Template.process(Template.java:277) [freemarker.jar:2.3.20]
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:366) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:283) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:233) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:263) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:624) [servlet-api.jar:na]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) [spring-webmvc-3.2.6.jar:3.2.6.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) [servlet-api.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) [catalina.jar:7.0.63]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.63]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61) [shiro-web-1.2.2.jar:1.2.2]
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.2.2.jar:1.2.2]
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.2.2.jar:1.2.2]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.2.2.jar:1.2.2]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) [shiro-web-1.2.2.jar:1.2.2]
at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) [shiro-web-1.2.2.jar:1.2.2]
at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) [shiro-web-1.2.2.jar:1.2.2]
at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) [shiro-core-1.2.2.jar:1.2.2]
at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) [shiro-core-1.2.2.jar:1.2.2]
at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383) [shiro-core-1.2.2.jar:1.2.2]
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) [shiro-web-1.2.2.jar:1.2.2]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.2.2.jar:1.2.2]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343) [spring-web-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260) [spring-web-3.2.6.jar:3.2.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.63]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.63]
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:230) [spring-orm-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-3.2.6.jar:3.2.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.63]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.63]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) [spring-web-3.2.6.jar:3.2.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-3.2.6.jar:3.2.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.63]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.63]
at com.jeecms.common.web.ProcessTimeFilter.doFilter(ProcessTimeFilter.java:35) [ProcessTimeFilter.class:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.63]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.63]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [catalina.jar:7.0.63]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.63]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) [catalina.jar:7.0.63]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) [catalina.jar:7.0.63]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:7.0.63]
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957) [catalina.jar:7.0.63]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [catalina.jar:7.0.63]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423) [catalina.jar:7.0.63]
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079) [tomcat-coyote.jar:7.0.63]
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620) [tomcat-coyote.jar:7.0.63]
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) [tomcat-coyote.jar:7.0.63]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [na:1.6.0_13]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [na:1.6.0_13]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-coyote.jar:7.0.63]
at java.lang.Thread.run(Thread.java:619) [na:1.6.0_13]
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