SpringBoot系列教材（三十三）- Thymeleaf - thymeleaf 内置工具用法示例和手册

SpringBoot系列教材（三十二）- Thymeleaf - thymeleaf 如何用th:each 做条件遍历

SpringBoot系列教材（三十四）- Thymeleaf - springboot 整合 thymeleaf 做增删改查 CRUD和分页

下载区
文件名	文件大小
thymeleaf.rar	5k

工具版本兼容问题

步骤 1 : 基于前面的知识点
步骤 2 : 先运行，看到效果，再学习
步骤 3 : 模仿和排错
步骤 4 : TestController
步骤 5 : test.html
步骤 6 : thymeleaf 内置工具
步骤 7 : Execution Info
步骤 8 : Messages
步骤 9 : URIs/URLs
步骤 10 : Conversions
步骤 11 : Dates
步骤 12 : Calendars
步骤 13 : Numbers
步骤 14 : Strings
步骤 15 : Objects
步骤 16 : Booleans
步骤 17 : Arrays
步骤 18 : Lists
步骤 19 : Sets
步骤 20 : Maps
步骤 21 : Aggregates
步骤 22 : IDs

步骤 1 :

基于前面的知识点

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本知识点是建立在上一个知识点可运行项目的基础上进行的改进,所以最好把上个知识点理解和消化了.

步骤 2 :

先运行，看到效果，再学习

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老规矩，先下载右上角的可运行项目，配置运行起来，确认可用之后，再学习做了哪些步骤以达到这样的效果。
运行 Application.java 然后访问测试地址:

http://127.0.0.1:8080/thymeleaf/test

可以看到如图所示的日期信息被格式化后的结果。
日期格式化的方式，就是借助了 thymeleaf 内置工具实现的。

步骤 3 :

模仿和排错

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在确保可运行项目能够正确无误地运行之后，再严格照着教程的步骤，对代码模仿一遍。
模仿过程难免代码有出入，导致无法得到期望的运行结果，此时此刻通过比较正确答案 ( 可运行项目 ) 和自己的代码，来定位问题所在。
采用这种方式，学习有效果，排错有效率，可以较为明显地提升学习速度，跨过学习路上的各个槛。

推荐使用diffmerge软件，进行文件夹比较。把你自己做的项目文件夹，和我的可运行项目文件夹进行比较。
这个软件很牛逼的，可以知道文件夹里哪两个文件不对，并且很明显地标记出来
这里提供了绿色安装和使用教程：diffmerge 下载和使用教程

步骤 4 :

TestController

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增加了日期对象，并且放在 "now" 这个变量上扔给视图

代码行数较多，请点击查看

package com.how2java.springboot.web;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.how2java.springboot.pojo.Product;
 
@Controller
public class TestController {
 
    @RequestMapping("/test")
    public String test(Model m) {
    	String htmlContent = "<p style='color:red'> 红色文字</p>";
    	Product currentProduct =new Product(5,"product e", 200);
    	boolean testBoolean = true;
    	
    	Date now = new Date();
    	
    	List<Product> ps = new ArrayList<>();
    	ps.add(new Product(1,"product a", 50));
    	ps.add(new Product(2,"product b", 100));
    	ps.add(new Product(3,"product c", 150));
    	ps.add(new Product(4,"product d", 200));
    	ps.add(currentProduct);
    	ps.add(new Product(6,"product f", 200));
    	ps.add(new Product(7,"product g", 200));    	
    	
    	m.addAttribute("now", now);
    	m.addAttribute("ps", ps);
    	m.addAttribute("htmlContent", htmlContent);
    	m.addAttribute("currentProduct", currentProduct);
    	m.addAttribute("testBoolean", testBoolean);
    	
        return "test";
    }
}

步骤 5 :

test.html

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使用#dates这个内置工具进行格式化日期

<div class="showing date">
<h2>格式化日期</h2>
直接输出日期 ${now}:
<p th:text="${now}"></p>
默认格式化 ${#dates.format(now)}:
<p th:text="${#dates.format(now)}"></p>
自定义格式化 ${#dates.format(now,'yyyy-MM-dd HH:mm:ss')}:
<p th:text="${#dates.format(now,'yyyy-MM-dd HH:mm:ss')}"></p>
</div>

<!DOCTYPE HTML> <html xmlns:th="http://www.thymeleaf.org"> <head> <title>hello</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <link rel="stylesheet" type="text/css" media="all" href="../../webapp/static/css/style.css" th:href="@{/static/css/style.css}"/> <script type="text/javascript" src="../../webapp/static/js/thymeleaf.js" th:src="@{/static/js/thymeleaf.js}"></script> <style> h2{ text-decoration: underline; font-size:0.9em; color:gray; } div.date p{ padding-left:20px; color:gray; } </style> </head> <body> <div class="showing date"> <h2>格式化日期</h2> 直接输出日期 ${now}: <p th:text="${now}"></p> 默认格式化 ${#dates.format(now)}: <p th:text="${#dates.format(now)}"></p> 自定义格式化 ${#dates.format(now,'yyyy-MM-dd HH:mm:ss')}: <p th:text="${#dates.format(now,'yyyy-MM-dd HH:mm:ss')}"></p> </div> <div class="showing"> <h2>遍历</h2> <table> <thead> <tr> <th>id</th> <th>产品名称</th> <th>价格</th> </tr> </thead> <tbody> <tr th:each="p: ${ps}"> <td th:text="${p.id}"></td> <td th:text="${p.name}"></td> <td th:text="${p.price}"></td> </tr> </tbody> </table> </div> <div class="showing"> <h2>带状态遍历</h2> <table> <thead> <tr> <th>index</th> <th>id</th> <th>产品名称</th> <th>价格</th> </tr> </thead> <tbody> <tr th:class="${status.even}?'even':'odd'" th:each="p,status: ${ps}"> <td th:text="${status.index}"></td> <td th:text="${p.id}"></td> <td th:text="${p.name}"></td> <td th:text="${p.price}"></td> </tr> </tbody> </table> </div> <div class="showing"> <h2>遍历 select </h2> <select size="3"> <option th:each="p:${ps}" th:value="${p.id}" th:selected="${p.id==currentProduct.id}" th:text="${p.name}" ></option> </select> </div> <div class="showing"> <h2>遍历 radio </h2> <input name="product" type="radio" th:each="p:${ps}" th:value="${p.id}" th:checked="${p.id==currentProduct.id}" th:text="${p.name}" /> </div> <div class="showing"> <h2>条件判断</h2> <p th:if="${testBoolean}" >如果testBoolean 是 true ，本句话就会显示</p> <p th:if="${not testBoolean}" >取反，所以如果testBoolean 是 true ，本句话就不会显示</p> <p th:unless="${testBoolean}" >unless 等同于上一句，所以如果testBoolean 是 true ，本句话就不会显示</p> <p th:text="${testBoolean}?'当testBoolean为真的时候，显示本句话，这是用三相表达式做的':''" ></p> </div> <div class="showing"> <h2>显示转义和非转义的 html 文本</h2> <p th:text="${htmlContent}" ></p> <p th:utext="${htmlContent}" ></p> </div> <div class="showing"> <h2>显示对象以及对象属性</h2> <p th:text="${currentProduct}" ></p> <p th:text="${currentProduct.name}" ></p> <p th:text="${currentProduct.getName()}" ></p> </div> <div class="showing" th:object="${currentProduct}"> <h2>*{}方式显示属性</h2> <p th:text="*{name}" ></p> </div> <div class="showing"> <h2>算数运算</h2> <p th:text="${currentProduct.price+999}" ></p> </div> <div class="showing"> <div th:replace="include::footer1" ></div> <div th:replace="include::footer2(2015,2018)" ></div> </div> </body> </html>

代码行数较多，请点击查看

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title>hello</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
	<link rel="stylesheet" type="text/css" media="all" href="../../webapp/static/css/style.css" th:href="@{/static/css/style.css}"/>
	<script type="text/javascript" src="../../webapp/static/js/thymeleaf.js" th:src="@{/static/js/thymeleaf.js}"></script>
    
	<style>
		h2{
			text-decoration: underline;
			font-size:0.9em;
			color:gray;
		}
		div.date p{
			padding-left:20px;
			color:gray;
		}
	</style>        
</head>
<body>

<div class="showing date">
	<h2>格式化日期</h2>
	直接输出日期 ${now}:
	<p th:text="${now}"></p>
	默认格式化 ${#dates.format(now)}:
	<p th:text="${#dates.format(now)}"></p>
	自定义格式化 ${#dates.format(now,'yyyy-MM-dd HH:mm:ss')}:
	<p th:text="${#dates.format(now,'yyyy-MM-dd HH:mm:ss')}"></p>
</div>

<div class="showing">
	<h2>遍历</h2>

	<table>
		<thead>
			<tr>
				<th>id</th>
				<th>产品名称</th>
				<th>价格</th>
			</tr>
		</thead>
		<tbody>
			<tr th:each="p: ${ps}">
				<td th:text="${p.id}"></td>
				<td th:text="${p.name}"></td>
				<td th:text="${p.price}"></td>
			</tr>
		</tbody>
	</table>
</div>

<div class="showing">
	<h2>带状态遍历</h2>
	<table>
		<thead>
			<tr>
				<th>index</th>
				<th>id</th>
				<th>产品名称</th>
				<th>价格</th>
			</tr>
		</thead>
		<tbody>
			<tr th:class="${status.even}?'even':'odd'" th:each="p,status: ${ps}">
				<td  th:text="${status.index}"></td>
				<td th:text="${p.id}"></td>
				<td th:text="${p.name}"></td>
				<td th:text="${p.price}"></td>
			</tr>
		</tbody>
	</table>
</div>

<div class="showing">
	<h2>遍历 select </h2>

	<select size="3">
		<option th:each="p:${ps}" th:value="${p.id}" 	th:selected="${p.id==currentProduct.id}" 	th:text="${p.name}" ></option>
	</select>

</div>

<div class="showing">
	<h2>遍历 radio </h2>

	<input name="product" type="radio" th:each="p:${ps}" th:value="${p.id}" 	th:checked="${p.id==currentProduct.id}" 	th:text="${p.name}"  />

</div>

<div class="showing">
	<h2>条件判断</h2>
	<p th:if="${testBoolean}" >如果testBoolean 是 true ，本句话就会显示</p>
	<p th:if="${not testBoolean}" >取反 ，所以如果testBoolean 是 true ，本句话就不会显示</p>
	<p th:unless="${testBoolean}" >unless 等同于上一句，所以如果testBoolean 是 true ，本句话就不会显示</p>
	<p th:text="${testBoolean}?'当testBoolean为真的时候，显示本句话，这是用三相表达式做的':''" ></p>
</div>

<div class="showing">
	<h2>显示 转义和非转义的 html 文本</h2>
	<p th:text="${htmlContent}" ></p>
	<p th:utext="${htmlContent}" ></p>
</div>

<div class="showing">
	<h2>显示对象以及对象属性</h2>
	<p th:text="${currentProduct}" ></p>
	<p th:text="${currentProduct.name}" ></p>
	<p th:text="${currentProduct.getName()}" ></p>
</div>

<div class="showing" th:object="${currentProduct}">
	<h2>*{}方式显示属性</h2>
	<p th:text="*{name}" ></p>
</div>

<div class="showing">
	<h2>算数运算</h2>
	<p th:text="${currentProduct.price+999}" ></p>
</div>

<div class="showing">
	<div th:replace="include::footer1" ></div>
	<div th:replace="include::footer2(2015,2018)" ></div>
</div>

</body>

</html>

步骤 6 :

thymeleaf 内置工具

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像 #date 这样的 thymeleaf内置工具有很多种，一共有如下16种。

Execution Info
Messages
URIs/URLs
Conversions
Dates
Calendars
Numbers
Strings
Objects
Booleans
Arrays
Lists
Sets
Maps
Aggregates
IDs

并不是每一种都用得到，所以这里把他们的用法手册列出来了，将来用到的时候再来查看就行了。

步骤 7 :

Execution Info

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${#execInfo.templateName}
${#execInfo.templateMode}
${#execInfo.processedTemplateName}
${#execInfo.processedTemplateMode}
${#execInfo.templateNames}
${#execInfo.templateModes}
${#execInfo.templateStack}

步骤 8 :

Messages

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${#messages.msg('msgKey')}
${#messages.msg('msgKey', param1)}
${#messages.msg('msgKey', param1, param2)}
${#messages.msg('msgKey', param1, param2, param3)}
${#messages.msgWithParams('msgKey', new Object[] {param1, param2, param3, param4})}
${#messages.arrayMsg(messageKeyArray)}
${#messages.listMsg(messageKeyList)}
${#messages.setMsg(messageKeySet)}
${#messages.msgOrNull('msgKey')}
${#messages.msgOrNull('msgKey', param1)}
${#messages.msgOrNull('msgKey', param1, param2)}
${#messages.msgOrNull('msgKey', param1, param2, param3)}
${#messages.msgOrNullWithParams('msgKey', new Object[] {param1, param2, param3, param4})}
${#messages.arrayMsgOrNull(messageKeyArray)}
${#messages.listMsgOrNull(messageKeyList)}
${#messages.setMsgOrNull(messageKeySet)}

步骤 9 :

URIs/URLs

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${#uris.escapePath(uri)}
${#uris.escapePath(uri, encoding)}
${#uris.unescapePath(uri)}
${#uris.unescapePath(uri, encoding)}
${#uris.escapePathSegment(uri)}
${#uris.escapePathSegment(uri, encoding)}
${#uris.unescapePathSegment(uri)}
${#uris.unescapePathSegment(uri, encoding)}
${#uris.escapeFragmentId(uri)}
${#uris.escapeFragmentId(uri, encoding)}
${#uris.unescapeFragmentId(uri)}
${#uris.unescapeFragmentId(uri, encoding)}
${#uris.escapeQueryParam(uri)}
${#uris.escapeQueryParam(uri, encoding)}
${#uris.unescapeQueryParam(uri)}
${#uris.unescapeQueryParam(uri, encoding)}

步骤 10 :

Conversions

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${#conversions.convert(object, 'java.util.TimeZone')}
${#conversions.convert(object, targetClass)}

步骤 11 :

Dates

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代码行数较多，请点击查看

${#dates.format(date)}
${#dates.arrayFormat(datesArray)}
${#dates.listFormat(datesList)}
${#dates.setFormat(datesSet)}
${#dates.formatISO(date)}
${#dates.arrayFormatISO(datesArray)}
${#dates.listFormatISO(datesList)}
${#dates.setFormatISO(datesSet)}
${#dates.format(date, 'dd/MMM/yyyy HH:mm')}
${#dates.arrayFormat(datesArray, 'dd/MMM/yyyy HH:mm')}
${#dates.listFormat(datesList, 'dd/MMM/yyyy HH:mm')}
${#dates.setFormat(datesSet, 'dd/MMM/yyyy HH:mm')}
${#dates.day(date)}                    
${#dates.month(date)}                  
${#dates.monthName(date)}              
${#dates.monthNameShort(date)}         
${#dates.year(date)}                   
${#dates.dayOfWeek(date)}              
${#dates.dayOfWeekName(date)}          
${#dates.dayOfWeekNameShort(date)}     
${#dates.hour(date)}                   
${#dates.minute(date)}                 
${#dates.second(date)}                 
${#dates.millisecond(date)}            
${#dates.create(year,month,day)}
${#dates.create(year,month,day,hour,minute)}
${#dates.create(year,month,day,hour,minute,second)}
${#dates.create(year,month,day,hour,minute,second,millisecond)}
${#dates.createNow()}
${#dates.createNowForTimeZone()}
${#dates.createToday()}
${#dates.createTodayForTimeZone()}

步骤 12 :

Calendars

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代码行数较多，请点击查看

${#calendars.format(cal)}
${#calendars.arrayFormat(calArray)}
${#calendars.listFormat(calList)}
${#calendars.setFormat(calSet)}
${#calendars.formatISO(cal)}
${#calendars.arrayFormatISO(calArray)}
${#calendars.listFormatISO(calList)}
${#calendars.setFormatISO(calSet)}
${#calendars.format(cal, 'dd/MMM/yyyy HH:mm')}
${#calendars.arrayFormat(calArray, 'dd/MMM/yyyy HH:mm')}
${#calendars.listFormat(calList, 'dd/MMM/yyyy HH:mm')}
${#calendars.setFormat(calSet, 'dd/MMM/yyyy HH:mm')}
${#calendars.day(date)}                
${#calendars.month(date)}              
${#calendars.monthName(date)}          
${#calendars.monthNameShort(date)}     
${#calendars.year(date)}               
${#calendars.dayOfWeek(date)}          
${#calendars.dayOfWeekName(date)}      
${#calendars.dayOfWeekNameShort(date)} 
${#calendars.hour(date)}               
${#calendars.minute(date)}             
${#calendars.second(date)}             
${#calendars.millisecond(date)}        
${#calendars.create(year,month,day)}
${#calendars.create(year,month,day,hour,minute)}
${#calendars.create(year,month,day,hour,minute,second)}
${#calendars.create(year,month,day,hour,minute,second,millisecond)}
${#calendars.createForTimeZone(year,month,day,timeZone)}
${#calendars.createForTimeZone(year,month,day,hour,minute,timeZone)}
${#calendars.createForTimeZone(year,month,day,hour,minute,second,timeZone)}
${#calendars.createForTimeZone(year,month,day,hour,minute,second,millisecond,timeZone)}
${#calendars.createNow()}
${#calendars.createNowForTimeZone()}
${#calendars.createToday()}
${#calendars.createTodayForTimeZone()}

步骤 13 :

Numbers

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代码行数较多，请点击查看

${#numbers.formatInteger(num,3)}
${#numbers.arrayFormatInteger(numArray,3)}
${#numbers.listFormatInteger(numList,3)}
${#numbers.setFormatInteger(numSet,3)}
${#numbers.formatInteger(num,3,'POINT')}
${#numbers.arrayFormatInteger(numArray,3,'POINT')}
${#numbers.listFormatInteger(numList,3,'POINT')}
${#numbers.setFormatInteger(numSet,3,'POINT')}
${#numbers.formatDecimal(num,3,2)}
${#numbers.arrayFormatDecimal(numArray,3,2)}
${#numbers.listFormatDecimal(numList,3,2)}
${#numbers.setFormatDecimal(numSet,3,2)}
${#numbers.formatDecimal(num,3,2,'COMMA')}
${#numbers.arrayFormatDecimal(numArray,3,2,'COMMA')}
${#numbers.listFormatDecimal(numList,3,2,'COMMA')}
${#numbers.setFormatDecimal(numSet,3,2,'COMMA')}
${#numbers.formatDecimal(num,3,'POINT',2,'COMMA')}
${#numbers.arrayFormatDecimal(numArray,3,'POINT',2,'COMMA')}
${#numbers.listFormatDecimal(numList,3,'POINT',2,'COMMA')}
${#numbers.setFormatDecimal(numSet,3,'POINT',2,'COMMA')}
${#numbers.formatCurrency(num)}
${#numbers.arrayFormatCurrency(numArray)}
${#numbers.listFormatCurrency(numList)}
${#numbers.setFormatCurrency(numSet)}
${#numbers.formatPercent(num)}
${#numbers.arrayFormatPercent(numArray)}
${#numbers.listFormatPercent(numList)}
${#numbers.setFormatPercent(numSet)}
${#numbers.formatPercent(num, 3, 2)}
${#numbers.arrayFormatPercent(numArray, 3, 2)}
${#numbers.listFormatPercent(numList, 3, 2)}
${#numbers.setFormatPercent(numSet, 3, 2)}
${#numbers.sequence(from,to)}
${#numbers.sequence(from,to,step)}

步骤 14 :

Strings

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${#strings.toString(obj)} ${#strings.isEmpty(name)} ${#strings.arrayIsEmpty(nameArr)} ${#strings.listIsEmpty(nameList)} ${#strings.setIsEmpty(nameSet)} ${#strings.defaultString(text,default)} ${#strings.arrayDefaultString(textArr,default)} ${#strings.listDefaultString(textList,default)} ${#strings.setDefaultString(textSet,default)} ${#strings.contains(name,'ez')} ${#strings.containsIgnoreCase(name,'ez')} ${#strings.startsWith(name,'Don')} ${#strings.endsWith(name,endingFragment)} ${#strings.indexOf(name,frag)} ${#strings.substring(name,3,5)} ${#strings.substringAfter(name,prefix)} ${#strings.substringBefore(name,suffix)} ${#strings.replace(name,'las','ler')} ${#strings.prepend(str,prefix)} ${#strings.append(str,suffix)} ${#strings.toUpperCase(name)} ${#strings.toLowerCase(name)} ${#strings.arrayJoin(namesArray,',')} ${#strings.listJoin(namesList,',')} ${#strings.setJoin(namesSet,',')} ${#strings.arraySplit(namesStr,',')} ${#strings.listSplit(namesStr,',')} ${#strings.setSplit(namesStr,',')} ${#strings.trim(str)} ${#strings.length(str)} ${#strings.abbreviate(str,10)} ${#strings.capitalize(str)} ${#strings.unCapitalize(str)} ${#strings.capitalizeWords(str)} ${#strings.capitalizeWords(str,delimiters)} ${#strings.escapeXml(str)} ${#strings.escapeJava(str)} ${#strings.escapeJavaScript(str)} ${#strings.unescapeJava(str)} ${#strings.unescapeJavaScript(str)} ${#strings.equals(first, second)} ${#strings.equalsIgnoreCase(first, second)} ${#strings.concat(values...)} ${#strings.concatReplaceNulls(nullValue, values...)} ${#strings.randomAlphanumeric(count)}

代码行数较多，请点击查看

${#strings.toString(obj)}                           
${#strings.isEmpty(name)}
${#strings.arrayIsEmpty(nameArr)}
${#strings.listIsEmpty(nameList)}
${#strings.setIsEmpty(nameSet)}
${#strings.defaultString(text,default)}
${#strings.arrayDefaultString(textArr,default)}
${#strings.listDefaultString(textList,default)}
${#strings.setDefaultString(textSet,default)}
${#strings.contains(name,'ez')}                     
${#strings.containsIgnoreCase(name,'ez')}           
${#strings.startsWith(name,'Don')}                  
${#strings.endsWith(name,endingFragment)}           
${#strings.indexOf(name,frag)}                      
${#strings.substring(name,3,5)}                     
${#strings.substringAfter(name,prefix)}             
${#strings.substringBefore(name,suffix)}            
${#strings.replace(name,'las','ler')}               
${#strings.prepend(str,prefix)}                     
${#strings.append(str,suffix)}                      
${#strings.toUpperCase(name)}                       
${#strings.toLowerCase(name)}                       
${#strings.arrayJoin(namesArray,',')}
${#strings.listJoin(namesList,',')}
${#strings.setJoin(namesSet,',')}
${#strings.arraySplit(namesStr,',')}                
${#strings.listSplit(namesStr,',')}                 
${#strings.setSplit(namesStr,',')}                  
${#strings.trim(str)}                               
${#strings.length(str)}                             
${#strings.abbreviate(str,10)}                      
${#strings.capitalize(str)}                         
${#strings.unCapitalize(str)}                       
${#strings.capitalizeWords(str)}                    
${#strings.capitalizeWords(str,delimiters)}         
${#strings.escapeXml(str)}                          
${#strings.escapeJava(str)}                         
${#strings.escapeJavaScript(str)}                   
${#strings.unescapeJava(str)}                       
${#strings.unescapeJavaScript(str)}                 
${#strings.equals(first, second)}
${#strings.equalsIgnoreCase(first, second)}
${#strings.concat(values...)}
${#strings.concatReplaceNulls(nullValue, values...)}
${#strings.randomAlphanumeric(count)}

步骤 15 :

Objects

edit 顶折

纠问

${#objects.nullSafe(obj,default)}
${#objects.arrayNullSafe(objArray,default)}
${#objects.listNullSafe(objList,default)}
${#objects.setNullSafe(objSet,default)}

步骤 16 :

Booleans

edit 顶折

纠问

${#bools.isTrue(obj)}
${#bools.arrayIsTrue(objArray)}
${#bools.listIsTrue(objList)}
${#bools.setIsTrue(objSet)}
${#bools.isFalse(cond)}
${#bools.arrayIsFalse(condArray)}
${#bools.listIsFalse(condList)}
${#bools.setIsFalse(condSet)}
${#bools.arrayAnd(condArray)}
${#bools.listAnd(condList)}
${#bools.setAnd(condSet)}
${#bools.arrayOr(condArray)}
${#bools.listOr(condList)}
${#bools.setOr(condSet)}

步骤 17 :

Arrays

edit 顶折

纠问

${#arrays.toArray(object)}
${#arrays.toStringArray(object)}
${#arrays.toIntegerArray(object)}
${#arrays.toLongArray(object)}
${#arrays.toDoubleArray(object)}
${#arrays.toFloatArray(object)}
${#arrays.toBooleanArray(object)}
${#arrays.length(array)}
${#arrays.isEmpty(array)}
${#arrays.contains(array, element)}
${#arrays.containsAll(array, elements)}

步骤 18 :

Lists

edit 顶折

纠问

${#lists.toList(object)}
${#lists.size(list)}
${#lists.isEmpty(list)}
${#lists.contains(list, element)}
${#lists.containsAll(list, elements)}
${#lists.sort(list)}
${#lists.sort(list, comparator)}
${#sets.toSet(object)}

步骤 19 :

Sets

edit 顶折

纠问

${#sets.size(set)}
${#sets.isEmpty(set)}
${#sets.contains(set, element)}
${#sets.containsAll(set, elements)}

步骤 20 :

Maps

edit 顶折

纠问

${#maps.size(map)}
${#maps.isEmpty(map)}
${#maps.containsKey(map, key)}
${#maps.containsAllKeys(map, keys)}
${#maps.containsValue(map, value)}
${#maps.containsAllValues(map, value)}

步骤 21 :

Aggregates

edit 顶折

纠问

${#aggregates.sum(array)}
${#aggregates.sum(collection)}
${#aggregates.avg(array)}
${#aggregates.avg(collection)}

步骤 22 :

IDs

edit 顶折

纠问

${#ids.seq('someId')}
${#ids.next('someId')}
${#ids.prev('someId')}

SpringBoot系列教材（三十二）- Thymeleaf - thymeleaf 如何用th:each 做条件遍历

SpringBoot系列教材（三十四）- Thymeleaf - springboot 整合 thymeleaf 做增删改查 CRUD和分页

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问答区域

2019-06-13 内置工具类说明

Tan_sir93

关于 JAVA 框架-SpringBoot-内置工具的提问

内置工具 Execution Info 获取页面模板的处理信息 Messages 在变量表达式中获取外部消息的方法，与使用＃{...}语法获取的方法相同 URIs/URLs 转义部分URL / URI的方法 Conversions 用于执行已配置的转换服务的方法 Dates 时间操作和时间格式化等 Calendars 用于更复杂时间的格式化 Numbers 格式化数字对象的方法 Strings 字符串工具类 Objects 一般对象类，通常用来判断非空 Booleans 常用的布尔方法 Arrays 数组工具类 Lists List 工具类 Sets Set 工具类 Maps 常用Map方法 Aggregates 在数组或集合上创建聚合的方法 IDs 处理可能重复的id属性的方法

8 个答案

松松仔
答案时间：2021-06-29

感谢大佬！

很倒霉的死小孩
答案时间：2021-02-02

好人一生平安

15779872975gy
答案时间：2020-10-09

从上面浏览下来，就一直在想“要是有解释注释就太棒了”，真棒吖

jasonhww
答案时间：2020-05-20

感谢

sparksun007
答案时间：2019-12-10

已保留，感谢分享~

Heron
答案时间：2019-11-19

感谢

bindi
答案时间：2019-08-16

谢谢大佬

李敏
答案时间：2019-07-18

感谢

回答已经提交成功，正在审核。请于我的回答处查看回答记录，谢谢

2019-02-09 站长，我怎样知道每一种的意思？

尚未佩妥剑

关于 JAVA 框架-SpringBoot-内置工具的提问

求解答

1 个答案

凡凡
答案时间：2019-02-19

每个自己用一下就知道了

回答已经提交成功，正在审核。请于我的回答处查看回答记录，谢谢

提问之前请登陆

提问已经提交成功，正在审核。请于我的提问处查看提问记录，谢谢

关于 JAVA 框架-SpringBoot-内置工具的提问

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