Html 如何使用百里香叶检查列表是否为空?

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时间:2020-08-29 18:21:29  来源:igfitidea点击:

How to check if list is empty using thymeleaf?

htmlthymeleaf

提问by Rahul Raj

<div th:if="${tblUserList != null}">
 --content--
</div>

The above thymeleaf code is not working, where tblUserList is a list. So I want to check whether the list is empty instead of checking its null. How to do that?

上面的 thymeleaf 代码不起作用,其中 tblUserList 是一个列表。所以我想检查列表是否为空而不是检查它的空值。怎么做?

回答by taxicala

You can do as follows:

您可以执行以下操作:

<div th:if="${not #lists.isEmpty(tblUserList)}">
 --content--
</div>

回答by Alexey Nikitenko

With Thymeleaf 3.x.xyou can validate list more elegant:

使用Thymeleaf 3.xx,您可以更优雅地验证列表:

<div th:if="${tblUserList!=null and !tblUserList.empty}"></div>

or

或者

<div th:if="${tblUserList!=null and !tblUserList.isEmpty()}"></div>

回答by Zon

Or simply:

或者干脆:

<div th:if="${myList.empty}">