使用 thymeleaf 模板
我们可以使用 thymeleaf 的模板功能将顶部 CSS 与底部 JS 封装起来，方便重用
定义模板
在 templates 目录下新建 includes 目录，并创建需要的模板文件
定义模板：<th:block th:fragment="header"></th:block>
引用模板：<th:block th:include="includes/header :: header"></th:block>
顶部模板 header.html
语法：<th:block th:fragment="header"></th:block>
<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-spring4-4.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<th:block th:fragment="header">
<meta charset="utf-8" />
<meta name="description" content="Latest updates and statistic charts">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link href="/assets/vendors/base/vendors.bundle.css" rel="stylesheet" type="text/css" />
<link href="/assets/demo/default/base/style.bundle.css" rel="stylesheet" type="text/css" />
<link href="/assets/custom/style.css" rel="stylesheet" type="text/css" />
<link rel="shortcut icon" href="/assets/demo/default/media/img/logo/favicon.ico" />
</th:block>
底部模板 footer.html
<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-spring4-4.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<th:block th:fragment="footer">
<script src="/assets/vendors/base/vendors.bundle.js" type="text/javascript"></script>
<script src="/assets/demo/default/base/scripts.bundle.js" type="text/javascript"></script>
</th:block>