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  • 라즈베리파이3 : 네트워크 프로그래밍
    eBOOK [컴퓨터/인터넷]
    • 대출 1/1
    • 예약 1
    • 누적대출 2
    • 추천 0
    ▶ 이 책은 네트워크 프로그래밍을 다룬 이론서입니다. 네트워크 프로그래밍의 기초적이고 전반적인 내용을 학습할 수 있습니다.
    • qr코드
  • 스마트폰, 블루투스, 이더넷, WIFI 그리고 아두이노
    eBOOK [컴퓨터/인터넷]
    • 대출 0/1
    • 예약 0
    • 누적대출 4
    • 추천 0
    ▶ 이 책은 스마트폰, 블루투스, 이더넷, WIFI 그리고 아두이노에 대해 다룬 도서입니다. 스마트폰, 블루투스, 이더넷, WIFI 그리고 아두이노의 기초적이고 전반적인 내용을 확인할 수 있도록 구성했습니다.
    • qr코드
  • 실전  DYNAMO 완전정복
    eBOOK [가정/생활]
    • 대출 0/1
    • 예약 0
    • 누적대출 2
    • 추천 0
    ▶ 이 책은 CAD/CAM/BIM을 다룬 이론서입니다. CAD/CAM/BIM의 기초적이고 전반적인 내용을 학습할 수 있습니다.
    • qr코드
  • 모터제어 DC,AC,BLDC Motors
    eBOOK
    • 대출 1/1
    • 누적대출 17
    • 추천 0
    ▶ 모터제어 DC,AC,BLDC Motors에 관한 내용을 담은 전문서적입니다.
      FreeMarker template error (HTML_DEBUG mode; use RETHROW in production!)
      
      The following has evaluated to null or missing:
      ==> vo.categoryVo  [in template "WEB-INF/templates/v3/product/productList.ftl" at line 385, column 70]
      
      ----
      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 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</#if>. (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: #if vo.categoryVo.classType?? && vo.c...  [in template "WEB-INF/templates/v3/product/productList.ftl" at line 385, column 65]
      	- Reached through: #include "/WEB-INF/templates/v3/produ...  [in template "WEB-INF/templates/product/productList.ftl" at line 7, column 330]
      ----
      
      Java stack trace (for programmers):
      ----
      freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...]
      	at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)
      	at freemarker.core.UnexpectedTypeException.newDesciptionBuilder(UnexpectedTypeException.java:85)
      	at freemarker.core.UnexpectedTypeException.<init>(UnexpectedTypeException.java:48)
      	at freemarker.core.NonHashException.<init>(NonHashException.java:49)
      	at freemarker.core.Dot._eval(Dot.java:48)
      	at freemarker.core.Expression.eval(Expression.java:83)
      	at freemarker.core.ExistsExpression._eval(ExistsExpression.java:49)
      	at freemarker.core.Expression.eval(Expression.java:83)
      	at freemarker.core.Expression.evalToBoolean(Expression.java:161)
      	at freemarker.core.Expression.evalToBoolean(Expression.java:147)
      	at freemarker.core.AndExpression.evalToBoolean(AndExpression.java:36)
      	at freemarker.core.IfBlock.accept(IfBlock.java:49)
      	at freemarker.core.Environment.visit(Environment.java:330)
      	at freemarker.core.Environment.visit(Environment.java:336)
      	at freemarker.core.Environment.visit(Environment.java:372)
      	at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:291)
      	at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271)
      	at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:242)
      	at freemarker.core.Environment.visitIteratorBlock(Environment.java:642)
      	at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:107)
      	at freemarker.core.IteratorBlock.accept(IteratorBlock.java:93)
      	at freemarker.core.Environment.visit(Environment.java:330)
      	at freemarker.core.Environment.visit(Environment.java:336)
      	at freemarker.core.Environment.visit(Environment.java:336)
      	at freemarker.core.Environment.include(Environment.java:2582)
      	at freemarker.core.Include.accept(Include.java:171)
      	at freemarker.core.Environment.visit(Environment.java:330)
      	at freemarker.core.Environment.visit(Environment.java:336)
      	at freemarker.core.Environment.visit(Environment.java:336)
      	at freemarker.core.Environment.process(Environment.java:309)
      	at freemarker.template.Template.process(Template.java:384)
      	at org.apache.struts2.views.freemarker.FreemarkerResult.doExecute(FreemarkerResult.java:223)
      	at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:193)
      	at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:372)
      	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:276)
      	at com.dsg.fx.freemarker.interceptors.FreeMarkerInterceptor.intercept(FreeMarkerInterceptor.java:436)
      	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245)
      	at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)
      	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
      	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245)
      	at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
      	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245)
      	at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253)
      	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245)
      	at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
      	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
      	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245)
      	at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
      	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245)
      	at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)
      	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245)
      	at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
      	at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:575)
      	at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)
      	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
      	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
      	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
      	at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
      	at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
      	at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
      	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)
      	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
      	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
      	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:728)
      	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:467)
      	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:392)
      	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311)
      	at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213)
      	at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171)
      	at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
      	at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
      	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)
      	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
      	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
      	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
      	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
      	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
      	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
      	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
      	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
      	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
      	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
      	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:486)
      	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
      	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
      	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
      	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
      	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
      	at java.lang.Thread.run(Thread.java:745)