<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<!-- http://sjy:8008/demo/index.jsp?meg=<script>alert('XSS%20attack')</script> -->
<%String message = request.getParameter("meg"); %>
<%=message %>
<form action="" method="post">
<input type="hidden" value="<%=message%>">
</form>
</body>
</html>
上面代码容易被XSS攻击，做个记录！
在浏览器中输入
http://sjy:8008/demo/index.jsp?meg=<script>alert('XSS%20attack')</script>
即可看到攻击效果