一、有关thymleaf的几个常用的知识点
springboot thymleaf 中 @、$、~的区别
thymleaf 的 官方文档 链接。
二、其他的一些信息
东西有点杂,看了很多资料整理总结的
1、接收信息
<td th:text="${allDeviceLists.name}"></td>
2、判断条件
<span class="label label-default" th:if="${allDeviceLists.status == 0 }">无效</span>
<span class="label label-default" th:unless="${allDeviceLists.status ge 1 }">有效</span>
3、遍历
<tr th:each="allDeviceLists,deviceStatus:${allDeviceLists}">
<!-- 序号 -->
<td th:text="${deviceStatus.count}"></td>
<!-- 遍历list<Map> 集合中 对象的属性值 -->
<td th:text="${allDeviceLists.name}"></td>
<tr>
deviceStatus 只是遍历起的一个变量,包含像序号等信息
状态变量有以下几个属性: 采纳于 链接
- index:当前迭代对象的index(从0开始计算)
- count: 当前迭代对象的index(从1开始计算)
- size:被迭代对象的大小
- current:当前迭代变量
- even/odd:布尔值,当前循环是否是偶数/奇数(从0开始计算)
- first:布尔值,当前循环是否是第一个
- last:布尔值,当前循环是否是最后一个
当然,user和userStat可以自己定义名字,如果没定义状态变量,那么thymleaf会自动给一个“变量名+Stat”。
4、内置工具对象的使用
只简单写一个日期转换的
<td th:text="${#dates.format(allDeviceLists.createTime,'yyyy-MM-dd HH:mm:ss')}"></td>
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. 12345678910111212345
#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: _
补充知识点:
lt:less than 小于
le:less than or equal to 小于等于
eq:equal to 等于
ne:not equal to 不等于
ge:greater than or equal to 大于等于
gt:greater than 大于