3.语法详解-thymeleaf

th:text 输出内容
th:value 输出到value属性，例如input标签

${#strings.isEmpty(str)}
${#strings.contains(str1,str2)}
${#strings.startsWith(str1,str2)}
${#strings.endsWith(str1,str2)}
${#strings.length(str)}
${#strings.indexOf(str1,str2)}
${#strings.substring(str,number)}
${#strings.substring(str,number1,number2)}
${#strings.toUpperCase(str)}
${#strings.toLowerCase(str)}

${#dates.format(key)} 格式化日期，默认的以浏览器默认语言为格式化标准
${#dates.format(key,'y/M/d')} 按照自定义的格式做日期转换
${#dates.year(key)} 取年
${#dates.month(key)} 取月
${#dates.day(key)} 取日

<span th:if="${sex} = '男'">
性别：男
</span>
<span th:if="${sex} = '女'">
性别：女
</span>

gt:     great than（大于）>
ge：    great equal（大于等于）>=
eq：    equal（等于）==
lt：    less than（小于）<
le：    less equal（小于等于）<=
ne：    not equal（不等于）!= 

<div th:switch="${id}">
    <span th:case="1>ID 为 1</span>
    <span th:case="2>ID 为 2</span>
    <span th:case="3>ID 为 3</span>
</div>

<table border="1">
            <tr>
                <th>姓名</th>
                <th>性别</th>
                <th>年龄</th>
            </tr>
            <tr th:each="item:${userList}">
                <td th:text="${item.name}"></td>
                <div th:switch="${item.sex}">
                    <td th:case='1'>男</td>
                    <td th:case='0'>女</td>
                </div>
                <th th:if="${item.age} le 20">青年</th>
                <th th:if="${item.age} gt 20 and ${item.age} le 40">中年</th>
                <th th:if="${item.age} gt 40">老年</th>
            </tr>
        </table>

<th>index <br> 从0开始的下标</th>
<th>count <br>  从1开始的下标</th>
<th>size <br>  集合大小</th>
<th>even <br>  index是否为偶数</th>
<th>odd <br> index是否为奇数</th>
<th>first <br>  是否为第一个元素</th>
<th>last <br>  是否为最后个元素</th>

<th th:text="${i.index}"></th>
<th th:text="${i.count}"></th>
<th th:text="${i.size}"></th>
<th th:text="${i.even}"></th>
<th th:text="${i.odd}"></th>
<th th:text="${i.first}"></th>
<th th:text="${i.last}"></th>

    @RequestMapping("showMap")
    public String showInfoMap(Model model){
        model.addAttribute("msg", "hello thymeleaf");
        Map<String,User> map=new HashMap<>();
        map.put("id1",new User("张三","男",18));
        map.put("id2",new User("李四","女",32));
        map.put("id3",new User("王五","女",58));
        model.addAttribute("userMap", map);
        return "indexMap";
    }

    <table border="1">
        <tr>
            <th>Id</th>
            <th>姓名</th>
            <th>性别</th>
            <th>年龄</th>
        </tr>
        <tr th:each="itemMap:${userMap}">
            <th th:each="temp:${itemMap}" th:text="${temp.key}">
            <th th:each="temp:${itemMap}" th:text="${temp.value.name}">
            <th th:each="temp:${itemMap}" th:text="${temp.value.sex}">
            <th th:each="temp:${itemMap}" th:text="${temp.value.age}">
        </tr>
    </table>