Thymeleaf 循环中的计数器 [英] Counters in Loops in Thymeleaf

问题描述

有没有办法在没有列表的情况下在 Thymeleaf 中进行循环?

我想基本上将此代码段转换为 Thymeleaf:

<fmt:formatDate var="year" value="${now}" pattern="yyyy"/><c:forEach var="i" begin="0" end="99"><form:option value="${year-i}"/></c:forEach></form:select>

-- 更新--

我已经决定这符合我想要的方式，但我不确定 springEL 语法:

<option th:each="i : ${#numbers.sequence( 1, 100)}" th:value="#{ T(java.util.Date).getYear() - $i }">1</option>

解决方案

如果您仍在寻找正确的 SpEL 语法，这对我有用:

1</option>

注意:

• 添加了 th:text 以设置选项文本.
  
• 改用 Joda-Time 因为 java.util.Date 不会给我想要的结果

阅读关于 java.util.Date 和 getYear() 的讨论>

Is there a way to do a loop in Thymeleaf without a list?

I'd like to essentially convert this snippet to Thymeleaf:

<jsp:useBean id="now" class="java.util.Date" />
<fmt:formatDate var="year" value="${now}" pattern="yyyy" />
<c:forEach var="i" begin="0" end="99">
    <form:option value="${year-i}" />
</c:forEach>
</form:select>

-- Update --

I've decided this is along the lines of how I want to do it, but I'm not sure about the springEL syntax:

<option th:each="i : ${#numbers.sequence( 1, 100)}" th:value="#{ T(java.util.Date).getYear() - $i }">1</option>

解决方案

In case you are still looking for the correct SpEL syntax, here's what worked for me:

<option th:each="i : ${#numbers.sequence( 1, 100)}"
        th:value="${ (new org.joda.time.DateTime()).getYear() - i }"
        th:text="${ (new org.joda.time.DateTime()).getYear() - i }">1</option>

Notice:

• added th:text to set the option text.
  
• used Joda-Time instead as java.util.Date wouldn't give me the desired outcome

Read this discussion on java.util.Date and getYear()

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