Thymeleaf
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2022-05-01 23:14:56
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官方教程：http://www.thymeleaf.org/doc/tutorials/2.1/usingthymeleaf.html#what-is-thymeleaf
推荐教程：http://blog.didispace.com/springbootweb/
http://blog.csdn.net/u012706811/article/details/52185345
1.引入依赖
springboot直接引入：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
非springboot项目使用如下依赖：
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
<version>2.1.4</version>
</dependency>
默认的模板映射路径是：src/main/resources/templates，
springboot1.4之后，可以使用thymeleaf3来提高效率，并且解决标签闭合问题，配置方式：
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- set thymeleaf version -->
<thymeleaf.version>3.0.0.RELEASE</thymeleaf.version>
<thymeleaf-layout-dialect.version>2.0.0</thymeleaf-layout-dialect.version>
<!--set java version-->
<java.version>1.8</java.version>
</properties>
2.配置thymeleaf视图解析器
这点与springMVC是相类似的：
#thymeleaf start
spring.thymeleaf.mode=HTML5
spring.thymeleaf.encoding=UTF-8
spring.thymeleaf.content-type=text/html
#开发时关闭缓存,不然没法看到实时页面
spring.thymeleaf.cache=false
#thymeleaf end
4.编写模板html
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>hello</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
<body>
<!--/*@thymesVar id="name" type="java.lang.String"*/-->
<p th:text="'Hello！, ' + ${name} + '!'">3333</p>
</body>
</html>
选择变量表达式{…}
<div th:object="${session.user}">
<p>Name: <span th:text="*{firstName}">Sebastian</span>.</p>
<p>Surname: <span th:text="*{lastName}">Pepper</span>.</p>
<p>Nationality: <span th:text={nationality}">Saturn</span>.</p>
</div>
等价于
<div>
<p>Name: <span th:text="${session.user.firstName}">Sebastian</span>.</p>
<p>Surname: <span th:text="${session.user.lastName}">Pepper</span>.</p>
<p>Nationality: <span th:text="${session.user.nationality}">Saturn</span>.</p>
</div>
链接表达式: @{…}
<!-- Will produce 'http://localhost:8080/gtvg/order/details?orderId=3' (plus rewriting) -->
<a href="details.html" th:href="@{http://localhost:8080/gtvg/order/details(orderId=${o.id})}">view</a> <!-- Will produce '/gtvg/order/details?orderId=3' (plus rewriting) -->
<a href="details.html" th:href="@{/order/details(orderId=${o.id})}">view</a>
<a href="details.html" th:href="@{order/{orderId}/details(orderId=${o.id})}">Content路径,默认访问static下的order文件夹</a>
条件
if/unless
使用th:if和th:unless属性进行条件判断，th:unless于th:if恰好相反，只有表达式中的条件不成立，才会显示其内容。
<a th:href="@{/login}" th:unless=${session.user != null}>Login</a>
switch
<div th:switch="${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>
循环
通过th:each
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>hello</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
<body>
<!-- 不存在则忽略，显示hello null!(可以通过默认值进行设置)-->
<p th:text="'Hello ' + (${name}?:'admin')">3333</p>
<table>
<tr>
<th>ID</th>
<th>NAME</th>
<th>AGE</th>
</tr>
<tr th:each="emp : ${empList}">
<td th:text="${emp.id}">1</td>
<td th:text="${emp.name}">海</td>
<td th:text="${emp.age}">18</td>
</tr>
</table>
</body>
</html>
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