1、thymeleaf簡介

Thymeleaf is a modern server-side Java template engine for both web and standalone environments, capable of processing HTML, XML, JavaScript, CSS and even plain text.

現代化、服務端Java模板引擎

2、基本語法

1、表示式

2、字面量

文字值: 'one text' , 'Another one!' ,…數字: 0 , 34 , 3.0 , 12.3 ,…布林值: true , false

空值: null

變數： one，two，.... 變數不能有空格

3、文字操作

字串拼接: +

變數替換: |The name is ${name}|

4、數學運算

運算子: + , - , * , / , %

5、布林運算

運算子: and

一元運算: ! , not

6、比較運算

比較: > , < , >= , <= ( gt , lt , ge , le )等式: == , != ( eq , ne )

7、條件運算

If-then: (if) ? (then)

If-then-else: (if) ? (then) : (else)

Default: (value) ?: (defaultvalue)

8、特殊操作

無操作： _

3、設定屬性值-th:attr

設定單個值

<form action="subscribe.html" th:attr="action=@{/subscribe}"
 
>
  <fieldset>
    <input type="text" name="email" />
    <input type="submit" value="Subscribe!" th:attr="value=#{subscribe.submit}"/>
  </fieldset>
</form>

設定多個值

<img src="../../images/gtvglogo.png"  th:attr="src=@{/images/gtvglogo.png},title=#{logo},alt=#{logo}" />

以上兩個的代替寫法 th:xxxx

<input type="submit" value="Subscribe!" th:value="#{subscribe.submit}"/>
<form action="subscribe.html" th:action="@{/subscribe}">

所有h5相容的標籤寫法

https://www.thymeleaf.org/doc/tutorials/3.0/usingthymeleaf.html#setting-value-to-specific-attributes

4、迭代

<tr th:each="prod : ${prods}">
        <td th:text="${prod.name}">Onions</td>
        <td th:text="${prod.price}">2.41</td>
        <td th:text="${prod.inStock}? #{true} : #{false}">yes</td>
</tr>

<tr th:each="prod,iterStat : ${prods}" th:class="${iterStat.odd}? 'odd'">
  <td th:text="${prod.name}">Onions</td>
  <td th:text="${prod.price}">2.41</td>
  <td th:text="${prod.inStock}? #{true} : #{false}">yes</td>
</tr>

5、條件運算

<a href="comments.html"
th:href="@{/product/comments(prodId=${prod.id})}"
th:if="${not #lists.isEmpty(prod.comments)}">view</a>

<div th:switch="${user.role}">
  <p th:case="'admin'">User is an administrator</p>
  <p th:case="#{roles.manager}">User is a manager</p>
  <p th:case="*">User is some other thing</p>
</div>

6、屬性優先順序

轉載：https://www.yuque.com/atguigu/springboot/vgzmgh