当我尝试显示连字符时，使用Freemarker的InvalidReferenceException

时间：2017-05-21 19:11:54

标签： freemarker spark-java spark-framework

我在版本2.5.5中使用Freemarker和Spark Framework：

<dependency>
    <groupId>com.sparkjava</groupId>
    <artifactId>spark-core</artifactId>
    <version>2.5.5</version>
</dependency>
<dependency>
    <groupId>com.sparkjava</groupId>
    <artifactId>spark-template-freemarker</artifactId>
    <version>2.5.5</version>
    <type>jar</type>
</dependency>

我正在尝试使用换行符和连字符保存textarea并显示值，但我收到的错误是我不清楚的。

例如，要保存，我正在使用：

<textarea class="form-control" rows="5" id="listaIngredientes" 
name="listaIngredientes"></textarea>

并显示我保存的内容（来自visualizar.ftl freemarker文件）：

<p><pre>${ingrediente.listaIngredientes}</pre></p>

这适用于大多数情况，包括显示换行符。但是，如果我尝试在textarea中添加连字符并在某些文本之前添加空格，则会收到此错误（在input或<pre>中）：     freemarker.core.InvalidReferenceException.getInstance（InvalidReferenceException.java:131）

为了更清楚，我将展示一些有用的文本和一些显示错误的文本：

  • 成功：sometext
  • 成功：sometext-sometext
  • 成功：sometext- sometext
  • 错误：sometext -sometext
  • 错误：sometext - sometext

我想知道如何预防这个问题。关于这个问题的错误并不清楚。

谢谢！

完整日志错误：

mai 21, 2017 4:02:47 PM freemarker.log._JULLoggerFactory$JULLogger error
SEVERE: Error executing FreeMarker template
FreeMarker template error:
The following has evaluated to null or missing:
==> ingrediente.listaIngredientes  [in template "ingredientes/visualizar.ftl" at line 103, column 17]

----
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</#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: ${ingrediente.listaIngredientes}  [in template "ingredientes/visualizar.ftl" at line 103, column 15]
----

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.EvalUtil.coerceModelToString(EvalUtil.java:355)
    at freemarker.core.Expression.evalAndCoerceToString(Expression.java:82)
    at freemarker.core.DollarVariable.accept(DollarVariable.java:41)
    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 spark.template.freemarker.FreeMarkerEngine.render(FreeMarkerEngine.java:69)
    at spark.TemplateViewRouteImpl$1.render(TemplateViewRouteImpl.java:61)
    at spark.TemplateViewRouteImpl$1.render(TemplateViewRouteImpl.java:58)
    at spark.TemplateViewRouteImpl.render(TemplateViewRouteImpl.java:86)
    at spark.http.matching.Routes.execute(Routes.java:62)
    at spark.http.matching.MatcherFilter.doFilter(MatcherFilter.java:130)
    at spark.embeddedserver.jetty.JettyHandler.doHandle(JettyHandler.java:50)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119)
    at org.eclipse.jetty.server.Server.handle(Server.java:517)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:261)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
    at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
    at java.lang.Thread.run(Thread.java:745)

java.lang.IllegalArgumentException: freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> ingrediente.listaIngredientes  [in template "ingredientes/visualizar.ftl" at line 103, column 17]

----
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</#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: ${ingrediente.listaIngredientes}  [in template "ingredientes/visualizar.ftl" at line 103, column 15]
----
    at spark.template.freemarker.FreeMarkerEngine.render(FreeMarkerEngine.java:72)
    at spark.TemplateViewRouteImpl$1.render(TemplateViewRouteImpl.java:61)
    at spark.TemplateViewRouteImpl$1.render(TemplateViewRouteImpl.java:58)
    at spark.TemplateViewRouteImpl.render(TemplateViewRouteImpl.java:86)
    at spark.http.matching.Routes.execute(Routes.java:62)
    at spark.http.matching.MatcherFilter.doFilter(MatcherFilter.java:130)
    at spark.embeddedserver.jetty.JettyHandler.doHandle(JettyHandler.java:50)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119)
    at org.eclipse.jetty.server.Server.handle(Server.java:517)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:261)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
    at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
    at java.lang.Thread.run(Thread.java:745)
Caused by: freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> ingrediente.listaIngredientes  [in template "ingredientes/visualizar.ftl" at line 103, column 17]

----
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</#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: ${ingrediente.listaIngredientes}  [in template "ingredientes/visualizar.ftl" at line 103, column 15]
----
    at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:131)
    at freemarker.core.EvalUtil.coerceModelToString(EvalUtil.java:355)
    at freemarker.core.Expression.evalAndCoerceToString(Expression.java:82)
    at freemarker.core.DollarVariable.accept(DollarVariable.java:41)
    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 spark.template.freemarker.FreeMarkerEngine.render(FreeMarkerEngine.java:69)
    ... 20 more
[qtp952081498-16] INFO spark.http.matching.MatcherFilter - The requested route [/ingredientes/visualizar/1030989562] has not been mapped in Spark for Accept: [text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]

0 个答案:

没有答案
相关问题
最新问题