thymeleaf reported an error that the field could not be found

The error is reported that the field cannot be found, and the error SpelEvaluationException is reported

org.springframework.expression.spel.SpelEvaluationException: EL1008E:(pos 21): Property or field 'groupIdCleanData' cannot be found on object of type 'java.lang.String' - maybe not public?
	at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:224) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:94) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.PropertyOrFieldReference.access$000(PropertyOrFieldReference.java:46) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorLValue.getValue(PropertyOrFieldReference.java:375) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.OpEQ.getValueInternal(OpEQ.java:42) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.OpEQ.getValueInternal(OpEQ.java:32) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:170) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.OpOr.getBooleanValue(OpOr.java:55) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.OpOr.getValueInternal(OpOr.java:46) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.OpOr.getValueInternal(OpOr.java:36) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:120) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:267) ~[spring-expression-4.3.4.RELEASE.jar:4.3.4.RELEASE]
	at org.thymeleaf.spring4.expression.SpelVariableExpressionEvaluator.evaluate(SpelVariableExpressionEvaluator.java:139) ~[thymeleaf-spring4-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.thymeleaf.standard.expression.VariableExpression.executeVariable(VariableExpression.java:154) ~[thymeleaf-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:59) ~[thymeleaf-2.1.5.RELEASE.jar:2.1.5.RELEASE]

The reason is likely to be missing dollar signs and parentheses. After inspection, it turns out:

conf : checkFamilyConfTmpNotInCleanData

After modification as follows:

conf : ${checkFamilyConfTmpNotInCleanData}

Compile and execute successfully