Thymeleaf模板引擎怎么使用

今天小编给大家分享一下Thymeleaf模板引擎怎么使用的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。

一、模板引擎

JSP、Velocity、Freemarker、Thymeleaf

二、springboot推荐使用Thymeleaf模板引擎

特点：语法更简单，功能更强大；

1、引入Thymeleaf

            org.springframework.boot            spring-boot-starter-thymeleaf        

2、Thymeleaf的使用

@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";

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

3、导入thymeleaf的名称空间

4、使用thymeleaf语法

            
成功！
        
这是显示欢迎信息

三、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

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}：   
    
Name: Sebastian.
    
Surname: Pepper.
    
Nationality: Saturn.
    
        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            
...
            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): ! , notComparisons 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: _

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