FreeMarker template error (DEBUG mode; use RETHROW in production!):The following has evaluated to null or missing:==> d.imgs[0].imgPath [in template "web/xiezilou/cz_list.ftl" at line 155, column 37]----Tip: It's the step after the last dot that caused this error, not those before it.----Tip: If the failing expression is known to be legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??--------FTL stack trace ("~" means nesting-related):- Failed at: #assign imgt = d.imgs[0].imgPath [in template "web/xiezilou/cz_list.ftl" at line 155, column 21]----Java stack trace (for programmers):----freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...]at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:131)at freemarker.core.Assignment.accept(Assignment.java:136)at freemarker.core.Environment.visitByHiddingParent(Environment.java:345)at freemarker.core.IfBlock.accept(IfBlock.java:48)at freemarker.core.Environment.visit(Environment.java:324)at freemarker.core.MixedContent.accept(MixedContent.java:54)at freemarker.core.Environment.visitByHiddingParent(Environment.java:345)at freemarker.core.IteratorBlock$IterationContext.executeNestedBlockInner(IteratorBlock.java:268)at freemarker.core.IteratorBlock$IterationContext.executeNestedBlock(IteratorBlock.java:220)at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:194)at freemarker.core.Environment.visitIteratorBlock(Environment.java:572)at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:78)at freemarker.core.IteratorBlock.accept(IteratorBlock.java:64)at freemarker.core.Environment.visit(Environment.java:324)at freemarker.core.MixedContent.accept(MixedContent.java:54)at freemarker.core.Environment.visit(Environment.java:324)at freemarker.core.Environment.process(Environment.java:302)at freemarker.template.Template.process(Template.java:325)at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:367)at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:284)at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:234)at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167)at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1246)at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1029)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:973)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at com.xhj.cms.filter.XssFilter.doFilter(XssFilter.java:34)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:92)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:167)at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:80)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1502)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458)at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.base/java.lang.Thread.run(Thread.java:834)