如何在填充表的循环内的百里香中做if if [英] How to do a if else in thymeleaf inside a loop that populate a table

问题描述

我正在使用< tr th:each> 填充表，并且我想放置一个if语句来评估该值(如果该值为null)，如果该值为null我想将此-"代替"null".

I'm populating a table using a <tr th:each> and I want to put a if statement that evaluates the value if it is null, if the values is null I want to put this "--" instead of "null".

我该如何使用 th:if 或其他类似的功能(使用百里香新手)来实现此目的?

How can I do this using the th:if or other similar function I am new using thymeleaf?

这是我的代码:

<table id="datatable_fixed_column" class="table table-striped table-bordered" width="100%">
  <thead>
    <tr>
        <th>name</th>
        <th>lastname</th>
     <tr>
   <tbody>
      <tr th:each="nodeInfo : ${listOfData}">
        <td  th:if="${nodeInfo.name} == 'null'"> -- </td>
        <td  th:if="${nodeInfo.name} != 'null'" th:text="${nodeInfo.name}"></td>

已代码已编辑且可以正常工作

EDITED: the code was edited and its working

推荐答案

只需将代码更改为:

<tr th:each="nodeInfo : ${listOfData}">
   <td  th:if="${nodeInfo.name} == null">This is the value if the name is null</td>
   <td  th:if="${nodeInfo.name} != null">This is the value if the name is NOT null</td>
</tr>

或更简而言之，您可以写:

Or even more consisely you could write:

<tr th:each="nodeInfo : ${listOfData}">
   <td  th:if="!${nodeInfo.name}">This is the value if the name is null</td>
   <td  th:if="${nodeInfo.name}">This is the value if the name is NOT null</td>
</tr>

之所以有效，是因为当 name 不为空时，将 $ {nodeInfo.name} 评估为 true

which works because ${nodeInfo.name} is evaluated to true when name is not null

您也可以探索使用 th:除非，而不是使用！=

You could also explore the use of th:unless instead of using !=

查看这部分文档以获取更多详细信息.

Check out this part of the documentation for more details.

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