<html>
<head>
<style>
#div1 {
width:100px;
height:100px;
border:1px black solid;
text-align: center;
}
#div2 {
width:100px;
height:100px;
border:1px black solid;
display:flex;
align-items:center;
/* 水平居中把这个打开 */
/* justify-content:center; */
}
</style>
</head>
<body>
<div id="div1">
<button>水平居中</button>
</div>
<div id="div2">
<button>垂直居中</button>
</div>
</body>
</html>【Java面试题与答案】整理推荐
