请问大神，怎么引入以下标签到首页会出错？         <div class="hundred100">             <div class="rim06">                 <!--网友评论_Begin-->                 [#if channel.commentControl!=2]                 [#include "inc_comment_input.html"/]                 [#include "inc_comment_list.html"/]                 [/#if]                 <!--网友评论_End-->             </div>         </div> 出错信息： 09:56:03.446 ERROR freemarker.runtime - Error executing FreeMarker template freemarker.core.InvalidReferenceException: The following has evaluated to null or missing: ==> channel  [in template "WEB-INF/t/cms/www/default/index/index.html" at line 443, column 22] 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: ==> #if channel.commentControl != 2  [in template "WEB-INF/t/cms/www/default/index/index.html" at line 443, column 17] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:98) ~[freemarker.jar:2.3.20] at freemarker.core.UnexpectedTypeException.newDesciptionBuilder(UnexpectedTypeException.java:41) ~[freemarker.jar:2.3.20] at freemarker.core.UnexpectedTypeException.<init>(UnexpectedTypeException.java:24) ~[freemarker.jar:2.3.20] at freemarker.core.Dot._eval(Dot.java:81) ~[freemarker.jar:2.3.20] at freemarker.core.Expression.eval(Expression.java:111) ~[freemarker.jar:2.3.20] at freemarker.core.EvalUtil.compare(EvalUtil.java:146) ~[freemarker.jar:2.3.20] at freemarker.core.ComparisonExpression.evalToBoolean(ComparisonExpression.java:103) ~[freemarker.jar:2.3.20] at freemarker.core.ConditionalBlock.accept(ConditionalBlock.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.Environment.process(Environment.java:243) [freemarker.jar:2.3.20] at freemarker.template.Template.process(Template.java:277) [freemarker.jar:2.3.20] at com.jeecms.common.web.springmvc.SimpleFreeMarkerView.renderMergedTemplateModel(SimpleFreeMarkerView.java:111) [SimpleFreeMarkerView.class:na] 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:617) [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:723) [servlet-api.jar:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) [catalina.jar:6.0.37] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37] at com.jeecms.common.web.XssFilter.doFilter(XssFilter.java:50) [XssFilter.class:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) [catalina.jar:6.0.37] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37] 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:235) [catalina.jar:6.0.37] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37] 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:235) [catalina.jar:6.0.37] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37] 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:235) [catalina.jar:6.0.37] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37] at com.jeecms.common.web.ProcessTimeFilter.doFilter(ProcessTimeFilter.java:35) [ProcessTimeFilter.class:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) [catalina.jar:6.0.37] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) [catalina.jar:6.0.37] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) [catalina.jar:6.0.37] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) [catalina.jar:6.0.37] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:6.0.37] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [catalina.jar:6.0.37] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) [catalina.jar:6.0.37] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861) [tomcat-coyote.jar:6.0.37] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606) [tomcat-coyote.jar:6.0.37] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) [tomcat-coyote.jar:6.0.37] at java.lang.Thread.run(Thread.java:662) [na:1.6.0_43]

首页不能用这个标签

回复第2楼  嗯。如果我把该标签放到 http://localhost:8080/JEECMS/veido/index.jhtml 下，应该怎么修改呢？

修改什么？这个是评论用的，栏目模板不清楚能不能用

回复第4楼  嗯。如果想把它引用到其他页面（另一个页面），怎样引用才完整在页面显示？

就是那样引用，这没什么完整不完整的说法

回复第6楼  嗯。以下标签

   [#if channel.commentControl!=2] 
                [#include "inc_comment_input.html"/] 
                [#include "inc_comment_list.html"/] 
                [/#if] 

请问 “2” 是什么意思？

源码里定义的一个参数而已

回复第8楼  好的，谢谢~