<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<AAA>
<div id = "b1"></div>
<div id = "b2"></div>
<div name ="t1"></div>
<div></div>
</AAA>
</body>
</html>
结果：定位到<div></div>这个元素即可
附录：xpath 学习地址：https://www.w3school.com.cn/xpath/index.asp