先来看个异常
Caused by: org.thymeleaf.exceptions.TemplateProcessingException: Could not parse as expression: " {field:'checkBox',checkbox: true, fixed: true} ,{field:'username', title: '用户名'} //width 支持：数字、百分比和不填写。你还可以通过 minWidth 参数局部定义当前单元格的最小宽度，layui 2.2.1 新增 ,{field:'mobile', title: '手机号', sort: true} ,{field:'nickname', title: '昵称'} ,{field:'lastLoginTime', title: '最后登录时间'} ,{field:'ip', title: '最后登录ip', align: 'center'} //单元格内容水平居中 ,{field:'op',title: '操作', align:'center', toolbar: '#toolBars'} //这里的toolbar值是模板元素的选择器 " (template: "platform/user/list" - line 48, col 20) at org.thymeleaf.standard.expression.StandardExpressionParser.parseExpression(StandardExpressionParser.java:131) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.standard.expression.StandardExpressionParser.parseExpression(StandardExpressionParser.java:62) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.standard.expression.StandardExpressionParser.parseExpression(StandardExpressionParser.java:44) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.engine.EngineEventUtils.parseAttributeExpression(EngineEventUtils.java:220) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.engine.EngineEventUtils.computeAttributeExpression(EngineEventUtils.java:207) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.standard.processor.AbstractStandardExpressionAttributeTagProcessor.doProcess(AbstractStandardExpressionAttributeTagProcessor.java:103) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.util.ProcessorConfigurationUtils$ElementTagProcessorWrapper.process(ProcessorConfigurationUtils.java:633) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.engine.ProcessorTemplateHandler.handleOpenElement(ProcessorTemplateHandler.java:1314) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.engine.OpenElementTag.beHandled(OpenElementTag.java:205) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.engine.TemplateModel.process(TemplateModel.java:136) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.engine.TemplateManager.process(TemplateManager.java:519) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.util.LazyProcessingCharSequence.writeUnresolved(LazyProcessingCharSequence.java:85) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.util.AbstractLazyCharSequence.write(AbstractLazyCharSequence.java:103) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.engine.AbstractTextualTemplateEvent.writeContent(AbstractTextualTemplateEvent.java:224) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.engine.Text.write(Text.java:78) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] at org.thymeleaf.engine.OutputTemplateHandler.handleText(OutputTemplateHandler.java:71) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE] ... 96 common frames omitted
这里只接触最外层异常，而出现异常的位置
<script> var cols=[[ {field:'checkBox',checkbox: true, fixed: true} ,{field:'username', title: '用户名'}
乍一看，没问题，也许对应用过thymeleaf的小伙伴来说一眼就看出了问题，但是对于新手确实很难发现，thymeleaf会把[[]]中的内容作为内联取值块解析，而不是数组。
解决办法：
方法一：回车换行如下：
<script> var cols=[ [ {field:'checkBox',checkbox: true, fixed: true} ,{field:'username', title: '用户名'}
方法二：添加th:inline="javascript"或者th:inline="none"，默认是th:inline="text"
<script th:inline="none"></script>
建议方法二，因为数据定义靠换行总觉得怪怪的，你说呢？
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