异常评估OGNL表达式-原标题：Exception evaluating OGNL expression

接着来

原文地址：http://www.javabeat.net/org-thymeleaf-exceptions-templateprocessingexception-exception-evaluating-ognl-expression/

下面是主题：

org.thymeleaf.exceptions.TemplateProcessingException:异常评估OGNL表达式

When you work with Thymeleaf application, you would have encountered the TemplateProcessingException exceptions. The problem is the use of default context variables. It could be because of

当我们使用Thymeleaf 应用的时候，你可能遇到过不少次TemplateProcessingException 异常。其问题在于默认的上下文变量。这可能有以下两种原因：

    1. 错误的context变量名称

    2. 变量的属性写错了

举个例子：

org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating OGNL expression: "#httpSession.sessionValue" (thymeleaf:11)
at org.thymeleaf.standard.expression.OgnlVariableExpressionEvaluator.evaluate(OgnlVariableExpressionEvaluator.java:126)
at org.thymeleaf.standard.expression.VariableExpression.executeVariable(VariableExpression.java:149)
at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:59)
at org.thymeleaf.standard.expression.Expression.execute(Expression.java:103)
at org.thymeleaf.standard.expression.Expression.execute(Expression.java:133)
at org.thymeleaf.standard.expression.Expression.execute(Expression.java:120)
at org.thymeleaf.standard.processor.attr.AbstractStandardTextChildModifierAttrProcessor.getText(AbstractStandardTextChildModifierAttrProcessor.java:68)
at org.thymeleaf.processor.attr.AbstractTextChildModifierAttrProcessor.getModifiedChildren(AbstractTextChildModifierAttrProcessor.java:59)
at org.thymeleaf.processor.attr.AbstractChildrenModifierAttrProcessor.processAttribute(AbstractChildrenModifierAttrProcessor.java:58)
at org.thymeleaf.processor.attr.AbstractAttrProcessor.doProcess(AbstractAttrProcessor.java:87)
at org.thymeleaf.processor.AbstractProcessor.process(AbstractProcessor.java:212)
at org.thymeleaf.dom.Node.applyNextProcessor(Node.java:973)
at org.thymeleaf.dom.Node.processNode(Node.java:928)
at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:672)
at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:655)
at org.thymeleaf.dom.Node.processNode(Node.java:947)
at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:672)
at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:655)
at org.thymeleaf.dom.Node.processNode(Node.java:947)
at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:672)
at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:655)
Caused by: ognl.NoSuchPropertyException: org.apache.catalina.session.StandardSessionFacade.sessionValue
at ognl.ObjectPropertyAccessor.getProperty(ObjectPropertyAccessor.java:151)
at ognl.OgnlRuntime.getProperty(OgnlRuntime.java:2334)
at ognl.ASTProperty.getValueBody(ASTProperty.java:114)
at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at ognl.SimpleNode.getValue(SimpleNode.java:258)
at ognl.ASTChain.getValueBody(ASTChain.java:141)
at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at ognl.SimpleNode.getValue(SimpleNode.java:258)
at ognl.Ognl.getValue(Ognl.java:494)
at ognl.Ognl.getValue(Ognl.java:458)
at org.thymeleaf.standard.expression.OgnlVariableExpressionEvaluator.evaluate(OgnlVariableExpressionEvaluator.java:114)