freemarker list size问题

2019独角兽企业重金招聘Python工程师标准>>>

取得list的长度：${fields?size}。

而使用判断其长度的时候，

<#if fields?size>0 > </#if>

竟抛出错了，说不是boolean类型，

Java backtrace for programmers: ---------- freemarker.core.NonBooleanException: Error on line 132, column 22 in viewEntity_js.ftl Expecting a boolean (true/false) expression here Expression fields?size does not evaluate to true/false it is an instance of freemarker.template.SimpleNumber          at freemarker.core.Expression.isTrue(Expression.java:150)

<#if (fields?size>0) > </#if>

转载于:https://my.oschina.net/joeyjava/blog/271569

文章来源: https://blog.csdn.net/weixin_34257076/article/details/91950179