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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!-- 指定JSP页面使用Java语言，
<%
// 获取请求的上下文路径，用于构建应用的根路径
String path = request.getContextPath();
// 构建基础路径，包含协议、服务器名称、端口号和上下文路径，用于后续资源的路径构建
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!-- JSP脚本片段，
<!DOCTYPE html>
<!-- 文档类型声明，
<html>
<!-- HTML文档的根元素开始 -->
<head>
<!-- head元素开始，
<meta charset="UTF-8">
<!-- 指定页面的字符编码为UTF-8 -->
<title>WELCOME</title>
<!-- 设置页面标题为"WELCOME" -->
</head>
<!-- head元素结束 -->
<body>
<!-- body元素开始，
<img width="1695px;" height="835px;" alt="" src="<%=basePath%>images/welcome.jpg">
<!-- img元素用于显示图片， ， ，
</body>
<!-- body元素结束 -->
</html>
<!-- HTML文档的根元素结束 -->
