div居中

<div style="width:100px;
            height:100px;
            border:1px solid red;
            margin: auto;
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;">好的</div>

<div style="width:100px;
            height:100px;
            border:1px solid red;
            margin: auto;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%,-50%);">好的</div>