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1.Thymeleaf的默认规则:
@ConfigurationProperties(
prefix = "spring.thymeleaf"
)
public class ThymeleafProperties {
private static final Charset DEFAULT_ENCODING = Charset.forName("UTF-8");
private static final MimeType DEFAULT_CONTENT_TYPE = MimeType.valueOf("text/html");
public static final String DEFAULT_PREFIX = "classpath:/templates/";
public static final String DEFAULT_SUFFIX = ".html";
.....
}
创建一个控制器类和一个简单的html页面
package com.myweb.springboot.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@Controller
public class HelloController {
@RequestMapping("success")
public String success(){
return "success" ;
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>成功!</h1>
</body>
</html>
访问: localhost:8080/success
只要把HTML页面放在 classpath:/templates/ , thymeleaf模板引擎就能自动渲染;
2.导入thymeleaf的名称空间 : xmlns:th="http://www.thymeleaf.org" ,导入后会有语法提示
3.使用thymeleaf语法 : ${}
忽略IDEA里面"${hello}"下的的红线
<!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后台对应的值-->
<div th:text="${hello}">这是一个div</div>
</body>
</html>
4.语法规则:
th : 任意html属性 : 替换原生属性的值
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>成功!</h1>
<!--th:text 将div里面的文本内容设置为后台对应的值-->
<div id="id1" class="classA" th:id="${hello}" th:class="${hello}" th:text="${hello}">这是一个div</div>
</body>
</html>
网页源码:
5.表达式:
Simple expressions(表达式语法):
Variable Expressions(获取变量值OGNL): ${...}
1.获取对象的属性,调用方法
2.使用内置的基本对象:
#ctx : the context object.
#vars: the context variables.
#locale : the context locale.
#request : (only in Web Contexts) the HttpServletRequest object.
#response : (only in Web Contexts) the HttpServletResponse object.
#session : (only in Web Contexts) the HttpSession object.
#servletContext : (only in Web Contexts) the ServletContext object.
3.内置的一些工具对象:
#execInfo : information about the template being processed.
#messages : methods for obtaining externalized messages inside variables expressions, in the same way as they
would be obtained using #{…} syntax.
#uris : methods for escaping parts of URLs/URIs
#conversions : methods for executing the configured conversion service (if any).
#dates : methods for java.util.Date objects: formatting, component extraction, etc.
#calendars : analogous to #dates , but for java.util.Calendar objects.
#numbers : methods for formatting numeric objects.
#strings : methods for String objects: contains, startsWith,prepending/appending,etc.
#objects : methods for objects in general.
#bools : methods for boolean evaluation.
#arrays : methods for arrays.
#lists : methods for lists.
#sets : methods for sets.
#maps : methods for maps.
#aggregates : methods for creating aggregates on arrays or collections.
#ids : methods for dealing with id attributes that might be repeated (for example, as a result of an iteration).
Selection Variable Expressions(选择表达式): *{...}
1.和${}在功能上一样,补充功能:配合 th:object 进行使用
Message Expressions(获取国际化内容): #{...}
Link URL Expressions(定义url): @{...}
Fragment Expressions(片段引用表达式): ~{...}
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 ${name}|
Arithmetic operations(数学运算):
Binary operators: + , - , * , / , %
Minus sign (unary operator): -
Boolean operations(布尔运算):
Binary operators: and , or
Boolean negation (unary operator): ! , not
Comparisons and equality(比较运算):
Comparators: > , < , >= , <= ( gt , lt , ge , le )
Equality operators: == , != ( eq , ne )
Conditional operators(条件运算-三元运算符):
If-then: (if) ? (then)
If-then-else: (if) ? (then) : (else)
Default: (value) ?: (defaultvalue)
Special tokens(特殊符号):
No-Operation(没有操作): _
详情参见上方pdf文档!
举个栗子:
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>成功!</h1>
<!--th:text 将div里面的文本内容设置为后台对应的值-->
<!--<div id="id1" class="classA" th:id="${hello}" th:class="${hello}" th:text="${hello}">这是一个div</div>-->
<hr/>
<!--th:text转义特殊字符-->
<div th:text="${hello}"></div>
<!--th:utext不转义特殊字符-->
<div th:utext="${hello}"></div>
<hr/>
<!--th:each每次都会生成当前这个标签-->
<!--3个h4-->
<h4 th:text="${user}" th:each="user:${users}"></h4>
<hr/>
<h4>
<span th:each="user:${users}"> [[${user}]] </span>
</h4>
</body>
</html>
行内写法: [[]] 和 [()]
[[]] = th:text : 转义特殊字符
[()] = th:utext : 不会转义特殊字符