springboot--Thymeleaf使用

1 ThymeleafProperties

@ConfigurationProperties(prefix = "spring.thymeleaf")
public class ThymeleafProperties {

	private static final Charset DEFAULT_ENCODING = StandardCharsets.UTF_8;

	public static final String DEFAULT_PREFIX = "classpath:/templates/";

	public static final String DEFAULT_SUFFIX = ".html";

只要我们把HTML页面放在classpath:/templates/，thymeleaf就能自动渲染；

2 使用

1 导入thymeleaf的名称空间

<html lang="en" xmlns:th="http://www.thymeleaf.org">

2 语法的使用

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF‐8">
<title>Title</title>
</head>
<body>
<h1>成功！</h1>
<!‐‐th:text 将div里面的文本内容设置为 ‐‐>
<div th:text="${hello}">这是显示欢迎信息</div>
</body>
</html>

注意：
在不进行语法渲染时候显示的是“这是显示欢迎信息”，在语法渲染时候显示的是hello信息。

3 语法规则

1）th:text；改变当前元素里面的文本内容

th：任意html属性；来替换原生属性的值
在这里插入图片描述

2）表达式

Simple expressions:（表达式语法）
Variable Expressions: ${...}：获取变量值；OGNL；
		1）、获取对象的属性、调用方法
		2）、使用内置的基本对象：
				#ctx : the context object
				#vars: the context variables.
				#locale : the context locale.
				#request : (only in Web Contexts) the HttpServletRequest object.
				#response : (only in Web Contexts) the HttpServletResponse object.
				#session : (only in Web Contexts) the HttpSession object.
				#servletContext : (only in Web Contexts) the ServletContext object.
				${session.foo}
		3）、内置的一些工具对象：
				#execInfo : information about the template being processed.
				#messages : methods for obtaining externalized messages inside variables expressions, in the same way as they would be obtained using #{…} syntax.
				#uris : methods for escaping parts of URLs/URIs
				#conversions : methods for executing the configured conversion service (if any).
				#dates : methods for java.util.Date objects: formatting, component extraction, etc.
				#calendars : analogous to #dates , but for java.util.Calendar objects.
				#numbers : methods for formatting numeric objects.
				#strings : methods for String objects: contains, startsWith, prepending/appending, etc.
				#objects : methods for objects in general.
				#bools : methods for boolean evaluation.
				#arrays : methods for arrays.
				#lists : methods for lists.
				#sets : methods for sets.
				#maps : methods for maps.
				#aggregates : methods for creating aggregates on arrays or collections.
				#ids : methods for dealing with id attributes that might be repeated (for example, as a result of an iteration).
		Selection Variable Expressions: *{...}：选择表达式：和${}在功能上是一样；
		补充：配合 th:object="${session.user}：
		<div th:object="${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>
Message Expressions: #{...}：获取国际化内容
Link URL Expressions: @{...}：定义URL；
	@{/order/process(execId=${execId},execType='FAST')}
Fragment Expressions: ~{...}：片段引用表达式
	<div th:insert="~{commons :: main}">...</div>
Literals（字面量）
	Text literals: 'one text' , 'Another one!' ,…
	Number literals: 0 , 34 , 3.0 , 12.3 ,…
	Boolean literals: true , false
	Null literal: null
	Literal tokens: one , sometext , main ,…
Text operations:（文本操作）
	String concatenation: +
	Literal substitutions: |The name is ${name}|
Arithmetic operations:（数学运算）
	Binary operators: + , ‐ , * , / ,%
	Minus sign (unary operator): ‐
Boolean operations:（布尔运算）
	Binary operators: and , or
	Boolean negation (unary operator): ! , not
Comparisons and equality:（比较运算）
	Comparators: > , < , >= , <= ( gt , lt , ge , le )
	Equality operators: == , != ( eq , ne )
Conditional operators:条件运算（三元运算符）
	If‐then: (if) ? (then)
	If‐then‐else: (if) ? (then) : (else)
	Default: (value) ?: (defaultvalue)
Special tokens:
	No‐Operation: _

案例如下：
MyController.java

@Controller
public class MyController {

	
	@RequestMapping(value="/my")
	public String myCon(Map<String,Object> map) {
		
		map.put("hello", "<h1>你好</h1>");
		map.put("users", Arrays.asList("张三","李四","王五"));
		
		return "my";
	}
}

my.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta >
<title>Title</title>
</head>
<body>
<div th:id="${hello}" th:class="${hello}" th:text="${hello}">这是显示欢迎信息</div>
<hr>
	<!-- 转义 -->
	<div th:text="${hello}"></div>
	<!-- 不转义 -->
	<div th:utext="${hello}"></div>
<hr>
	<!--  循环 注意循环的是 th:each所在的这个标签-->
	<h4  th:text="${user}" th:each="user:${users}"> </h4>	
<hr>	
	<h4>
		<span  th:each="user:${users}">[[${user}]]</span>
	</h4>
<hr>
</body>
</html>

结果：
在这里插入图片描述

springboot--Thymeleaf使用

1 ThymeleafProperties

2 使用

3 语法规则

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