th:action
th:action="@{/text-templates/form}" #重新定义action的提交URL
th:method
th:method="post" #用于定义提交的方法
th:object
<form id="login-form" th:action="@{/login}" th:object="${loginBean}">...</form>
即form里的表单项的name="xxx" 与loginBean里的属性字段能够对应上
th:value
<input th:value = "${user.name}" />
th:value="*{name}" 给属性赋值
th:test
文本替换<p th:text="${collect.description}">description</p>