1. model传值
后端通过Model传值到前端，页面通过Model取值显示，js通过Model取值作为变量使用
- 后台Controller
model.addAttribute("message", "This is your message");
2)页面取值
<p th:text="#{message}>default message</p>
- js取值
<script th:inline="javascript">
var message = [[${message}]];
console.log(message);
</script>
2. session传值
- 后台Controller
session.setAttribute("sessionValue", "someValue");
- 页面取值
<div th:text="${session.sessionValue}">default value</div>
3. request传值
1）后台Controller
request.setAttribute("requestValue", "someValue");
2）页面取值
<input th:value=${requestValue}/>
