thymeleaf th:onclike 传入多个字符串

我是这么写的

 th:onclick="showImage([[${files.filePath}]],[[${files.thumbnailPath}]])"

两个参数中间用英文逗号隔开

可是我在网上看到，有人是这么写的

th:οnclick="'javascript:searchHot(\''+${hot.name}+'\',\''+${hot.hotType}+'\')'"

我试了一下，报如下错误

Caused by: org.thymeleaf.exceptions.TemplateProcessingException: Only variable expressions returning numbers or booleans are allowed in this context, any other datatypes are not trusted in the context of this expression, including Strings or any other object that could be rendered as a text literal. A typical case is HTML attributes for event handlers (e.g. "onload"), in which textual data from variables should better be output to "data-*" attributes and then read from the event handler. (template: "system/knowledge/edit" - line 119, col 69)
    at org.thymeleaf.standard.expression.VariableExpression.executeVariableExpression(VariableExpression.java:181)
    at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:66)
    at org.thymeleaf.standard.expression.Expression.execute(Expression.java:109)
    at org.thymeleaf.standard.expression.AdditionExpression.executeAddition(AdditionExpression.java:96)
    at org.thymeleaf.standard.expression.ComplexExpression.executeComplex(ComplexExpression.java:62)
    at org.thymeleaf.standard.expression.Expression.execute(Expression.java:112)
    at org.thymeleaf.standard.expression.AdditionExpression.executeAddition(AdditionExpression.java:89)
    at org.thymeleaf.standard.expression.ComplexExpression.executeComplex(ComplexExpression.java:62)
    at org.thymeleaf.standard.expression.Expression.execute(Expression.java:112)
    at org.thymeleaf.standard.expression.AdditionExpression.executeAddition(AdditionExpression.java:89)
    at org.thymeleaf.standard.expression.ComplexExpression.executeComplex(ComplexExpression.java:62)
    at org.thymeleaf.standard.expression.Expression.execute(Expression.java:112)
    at org.thymeleaf.standard.expression.AdditionExpression.executeAddition(AdditionExpression.java:89)
    at org.thymeleaf.standard.expression.ComplexExpression.executeComplex(ComplexExpression.java:62)
    at org.thymeleaf.standard.expression.Expression.execute(Expression.java:112)
    at org.thymeleaf.standard.expression.Expression.execute(Expression.java:138)
    at org.thymeleaf.standard.processor.StandardDOMEventAttributeTagProcessor.doProcess(StandardDOMEventAttributeTagProcessor.java:214)
    at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74)
    at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95)
    at org.thymeleaf.util.ProcessorConfigurationUtils$ElementTagProcessorWrapper.process(ProcessorConfigurationUtils.java:633)
    at org.thymeleaf.engine.ProcessorTemplateHandler.handleStandaloneElement(ProcessorTemplateHandler.java:918)
    at org.thymeleaf.engine.StandaloneElementTag.beHandled(StandaloneElementTag.java:228)
    at org.thymeleaf.engine.Model.process(Model.java:282)
    at org.thymeleaf.engine.Model.process(Model.java:290)
    at org.thymeleaf.engine.IteratedGatheringModelProcessable.processIterationModel(IteratedGatheringModelProcessable.java:367)
    at org.thymeleaf.engine.IteratedGatheringModelProcessable.process(IteratedGatheringModelProcessable.java:221)
    at org.thymeleaf.engine.ProcessorTemplateHandler.handleCloseElement(ProcessorTemplateHandler.java:1640)
    at org.thymeleaf.engine.TemplateHandlerAdapterMarkupHandler.handleCloseElementEnd(TemplateHandlerAdapterMarkupHandler.java:388)
    at org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler$InlineMarkupAdapterPreProcessorHandler.handleCloseElementEnd(InlinedOutputExpressionMarkupHandler.java:322)
    at org.thymeleaf.standard.inline.OutputExpressionInlinePreProcessorHandler.handleCloseElementEnd(OutputExpressionInlinePreProcessorHandler.java:220)
    at org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler.handleCloseElementEnd(InlinedOutputExpressionMarkupHandler.java:164)
    at org.attoparser.HtmlElement.handleCloseElementEnd(HtmlElement.java:169)
    at org.attoparser.HtmlMarkupHandler.handleCloseElementEnd(HtmlMarkupHandler.java:412)
    at org.attoparser.MarkupEventProcessorHandler.handleCloseElementEnd(MarkupEventProcessorHandler.java:473)
    at org.attoparser.ParsingElementMarkupUtil.parseCloseElement(ParsingElementMarkupUtil.java:201)
    at org.attoparser.MarkupParser.parseBuffer(MarkupParser.java:725)
    at org.attoparser.MarkupParser.parseDocument(MarkupParser.java:301)
    ... 97 more

说是只能穿布尔类型和数字类型，不知道没试过