Thymeleaf表达式

男娘i 2022-05-14 23:49 183阅读 0赞

### 表达式 ###

查看文档  
![这里写图片描述][70]

Variable Expressions: ${
       ...}
    Selection Variable Expressions: *{
       ...}
    Message Expressions: #{...}
    Link URL Expressions: @{
       ...}
    Fragment Expressions: ~{
       ...}

### $\{…\} ###

获取变量值，底层是OGNL表达式  
获取对象的属性、调用方法

调用对象属性

${person.father.name}
    ${person['father']['name']}

Map获取

${ countriesByCode.ES}
    ${ personsByName['Stephen Zucchini'].age}

数组获取

${personsArray[0].name}

调用方法，可以传参数

${ person.createCompleteName()}
    ${ person.createCompleteNameWithSeparator('-')}

![这里写图片描述][70 1]  
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.

使用方式  
![这里写图片描述][70 2]  
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).

使用方式  
![这里写图片描述][70 3]

### \*\{…\} ###

选择表达式  
与$\{\}在功能上是一样，添加了一个补充功能  
配合th:object进行使用

\*号，表示当前div中，获取的对象Object  
直接获取对象的属性即可

<div th:object="${session.user}">
 Name: Sebastian.
 Surname: Pepper.
 Nationality: Saturn.
 </div>

![这里写图片描述][70 4]

### `#`\{…\} ###

获取国际化内容  
![这里写图片描述][70 5]

### @\{…\} ###

定义URL  
![这里写图片描述][70 6]

### ~\{…\} ###

片段引用表达式  
![这里写图片描述][70 7]

[70]: /images/20220515/b87a96d5a10d4b25b94331c3e5afc7e1.png
[70 1]: /images/20220515/ecedff5263ed40259cf979e5276ab6de.png
[70 2]: /images/20220515/0119ef9734b14e0d96df950d2bf9a9a7.png
[70 3]: /images/20220515/89b858c99ea445ecbc0081ceb15aad42.png
[70 4]: /images/20220515/b040b47d0df74130a6f5e74cbd19e95f.png
[70 5]: /images/20220515/ffa213b6fbf344638d367573dca9f194.png
[70 6]: /images/20220515/5bfd14b3a23a4aaf991806f00ca5e44f.png
[70 7]: /images/20220515/f3a8b0cdedca4458aa6fe0c548821402.png