thymeleaf教程

本教程涵盖了常见的前端操做,好比,判断,循环,引入模板,经常使用函数(日期格式化,字符串操做)下拉,js和css中使用,基本能够应对通常场景。javascript

怎么使用?

前端html页面标签中引入以下:css

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

 

表达式

  • 简单表达式 html

    • 可用值表达式(后台设置): ${…}
    • 全部可用值表达式: *{…}前端

     

    好比*{name} 从可用值中查找name,若是有上下文,好比上层是object,则查object中的name属性。html5

  • 消息表达式: #{…} 

    国际化时使用,也可使用内置的对象,好比date格式化数据java

  • 连接表达式: @{…} 
    用来配合link src href使用的语法
  • 片断表达式: ~{…} 
    用来引入公共部分代码片断,并进行传值操做使用的语法。
  • 文字app

    • 文本: ‘one text’,’another text’,…
    • 数字: 1,2,1.2,…
    • 布尔: true,false
    • 空值:null
    • 单词: something,main,name,…
  • 文本操做less

    • 连接:+
    • 替换:|The name is ${name}| 
      html 
      <a href="" th:href="@{|/name/${test.size()}|}">连接地址:</a> 
      //渲染后的结果 
      <a href="/name/3">连接地址:</a> 
  • 数学操做async

    • 二元操做:+, - , * , / , %
    • 一元操做: - (负)
  • 布尔操做函数

    • 一元 : and or
    • 二元 : !,not
  • 比较

    • 比较:> , < , >= , <= ( gt , lt , ge , le )
    • 等于:== , != ( eq , ne )
  • 条件

    • If-then: (if) ? (then)
    • If-then-else: (if) ? (then) : (else)
    • Default: (value) ?: (defaultvalue)
  • 无操做 
    使用_ 来禁止转义。

支持的操做

html5的操做支持:

th:abbr          th:accept             th:accept-charset
th:accesskey             th:action             th:align
th:alt             th:archive             th:audio
th:autocomplete             th:axis             th:background
th:bgcolor             th:border             th:cellpadding
th:cellspacing             th:challenge             th:charset
th:cite             th:class             th:classid
th:codebase             th:codetype             th:cols
th:colspan             th:compact             th:content
th:contenteditable             th:contextmenu             th:data
th:datetime             th:dir             th:draggable
th:dropzone             th:enctype             th:for
th:form             th:formaction             th:formenctype
th:formmethod             th:formtarget             th:fragment
th:frame             th:frameborder             th:headers
th:height             th:high             th:href
th:hreflang             th:hspace             th:http-equiv

th:icon             th:id             th:inline
th:keytype             th:kind             th:label
th:lang             th:list             th:longdesc
th:low             th:manifest             th:marginheight
th:marginwidth             th:max             th:maxlength
th:media             th:method             th:min
th:name            th:onabort            th:onafterprint
th:onbeforeprint            th:onbeforeunload            th:onblur
th:oncanplay            th:oncanplaythrough            th:onchange
th:onclick            th:oncontextmenu            th:ondblclick
th:ondrag            th:ondragend            th:ondragenter
th:ondragleave            th:ondragover            th:ondragstart
th:ondrop            th:ondurationchange            th:onemptied
th:onended            th:onerror            th:onfocus
th:onformchange            th:onforminput            th:onhashchange
th:oninput            th:oninvalid            th:onkeydown
th:onkeypress            th:onkeyup            th:onload
th:onloadeddata            th:onloadedmetadata            th:onloadstart
th:onmessage            th:onmousedown            th:onmousemove
th:onmouseout            th:onmouseover            th:onmouseup
th:onmousewheel            th:onoffline            th:ononline
th:onpause            th:onplay            th:onplaying
th:onpopstate            th:onprogress            th:onratechange
th:onreadystatechange            th:onredo            th:onreset
th:onresize            th:onscroll            th:onseeked
th:onseeking            th:onselect            th:onshow
th:onstalled            th:onstorage            th:onsubmit
th:onsuspend            th:ontimeupdate            th:onundo
th:onunload            th:onvolumechange            th:onwaiting
th:optimum            th:pattern            th:placeholder
th:poster            th:preload            th:radiogroup
th:rel            th:rev            th:rows
th:rowspan            th:rules            th:sandbox
th:scheme            th:scope            th:scrolling
th:size            th:sizes            th:span
th:spellcheck            th:src            th:srclang
th:standby            th:start            th:step
th:style            th:summary            th:tabindex
th:target            th:title            th:type
th:usemap            th:value            th:valuetype
th:vspace            th:width            th:wrap

th:vspace            th:width            th:wrap
th:xmlbase            th:xmllang            th:xmlspace

布尔类型

th:async th:autofocus th:autoplay
th:checked th:controls th:declare
th:default th:defer th:disabled
th:formnovalidate th:hidden th:ismap
th:loop th:multiple th:novalidate
th:nowrap th:open th:pubdate
th:readonly th:required th:reversed
th:scoped th:seamless th:selected

判断操做

thymeleaf提供了几种判断,if、switch

  • 后台数据
public class TestVo { private String name; private Integer Score; private Integer male; private Date birthday; public TestVo(String name, Integer score, Date birthday, Integer male) { this.name = name; Score = score; this.male = male; this.birthday = birthday; }
@RequestMapping("/test01") public String thymeleaf(ModelMap map){ List<TestVo> testVos=new ArrayList<>(); testVos.add(new TestVo("数学",10,new Date(),1)); testVos.add(new TestVo("数学0001",70,new Date(),2)); testVos.add(new TestVo("数学01",100,new Date(),3)); map.put("test",testVos); return "/back/import/test"; }
  • 前端语法
<table> <thead> <th></th> </thead> <tbody> <tr th:each="test:${test}"> <!--判断成绩--> <td th:if="${test.Score} gt 0 and ${test.Score} lt 60">差</td> <td th:if="${test.Score} ge 60 and ${test.Score} le 70">中</td> <td th:if="${test.Score} gt 70 and ${test.Score} le 80">良</td> <td th:if="${test.Score} gt 80 and ${test.Score} le 90">优</td> <td th:if="${test.Score} gt 90 and ${test.Score} le 100">超级优秀</td> </tr> <br> <tr th:each="test:${test}"> <!--判断成绩 通常只有两种状况的时候可使用这种方式--> <td th:if="${test.Score} gt 0 and ${test.Score} lt 60">差</td> <!--除了这些条件以外的--> <td th:unless="${test.Score} gt 0 and ${test.Score} lt 60">及格</td> </tr> <tr th:each="test:${test}"> <td th:switch="${test.male}"> <span th:case="1">男</span> <span th:case="2">女</span> <!--其余状况--> <span th:case="*">未知</span> </td> </tr> </tbody> </table>

 

  • 结果

差 
中 
超级优秀

差 
及格 
及格

男 

模板操做

主要引入公共头部和底部相关代码使用 ,固然也能够其余地方使用 
- 示例

底部模板代码

<!DOCTYPE html> <html lang="en" xmlns:th="http://www.w3.org/1999/xhtml"> <body> <div th:fragment="footer"> © 2016 xxx </div> </body> </html>

 

Springboot整合引入模块

<!--写入绝对路径便可引入 --> <div th:include="/back/import/footer :: footer"></div>

文本和带格式文本

用来输入内容到标签内部,而不是attr中。分为th:text和th:utext两种,后者能够渲染文本中的标签。 
- th:utext

map.put("msgutext","<b>1111</b>");
<div th:utext="${msgutext}"></div>

结果:被渲染了

  • th:text
<div th:text="${msgutext}"></div>

结果:原样输出到页面。

外围包裹–block

有时候须要在代码外部加层条件,但写div之类的又影响样式,此状况下你能够用下面这种方式:

<th:block th:with="score=${test.Score}"> <td th:if="${score} ge 60">及格啦</td> </th:block>

 

循环

遍历元素

  • 示例:
<tr th:each="test:${test}"> <td th:text="${test.Score}"></td> </tr>

循环下标判断

List<String> list=new ArrayList<String>(); list.add("1s"); list.add("2s"); list.add("3s"); map.put("list",list);
<th:block th:each="mylist,iterStat:${list}"> 111 <span th:text="${mylist}"></span> <th:block th:if="${iterStat.index le 1}"> <span th:text="${mylist}"></span> </th:block> </th:block>

 

经常使用操做

  • 日期格式化
<td th:text="${#dates.format(content.createDate,'yyyy-MM-dd HH:mm:ss')}" ></td>

 

  • 字符截取长度
<td th:if="${#strings.length(content.title) gt 5 } " th:text="${#strings.substring(content.title,0,5) + '…'}"></td>

 

  • 下拉选择
<select name="subId" id="subId" lay-verify="" > <option value="">请选择</option> <option th:each="channelsub:${subchannels}" th:selected="${channelsub.id == subId}" th:value="${channelsub.id}" th:text="${channelsub.name}"></option> </select>

js取值

有时候须要传递参数到js中,按以下方式:

<script th:inline="javascript" > var size= [[${test.size()}]]; console.info(size) </script>
  • 进阶 
    ps: 下面涉及到thymeleaf的语法出,能够替换成其余thymeleaf的语法来用
<script th:inline="javascript" > //尺寸等于3时打印日志.. /*[# th:if="${test.size() eq 3}"]*/ console.info('Welcome admin'); /*[/]*/ </script>

 

css取值

首先须要后台设置classname、align的值,以后按以下方式:

<style th:inline="css"> .[[${classname}]] { text-align: [[${align}]]; } </style>

 

结语

thymeleaf还有不少其余的语法,这里只是作个入门,方便上手,详细教程请参阅 官方教程。固然也能够加群交流。

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