方法1：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
div.center{
text-align: center;
background: hsl(0,100%,97%);
}
div.center img{
width: 33%;
height: auto;
}
</style>
</head>
<body>
<div class="center">
<img src="img.png">
</div>
</body>
</html>方法2：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
div.center{
background: hsl(60,100%,97%);
}
div.center img{
display: block;
width: 33%;
height: auto;
margin: 0 auto;
}
</style>
</head>
<body>
<div class="center">
<img src="img.png">
</div>
</body>
</html>方法3：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.center-aligned{
display: table;
background: hsl(120,100%,97%);
width: 100%;
}
.center-core{
display: table-cell;
text-align: center;
vertical-align: middle;
}
.center-core img{
width: 33%;
height: auto;
}
</style>
</head>
<body>
<div class="center-aligned">
<div class="center-core">
<img src="img.png">
</div>
</div>
</body>
</html>方法4：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.absolute-aligned{
position: relative;
min-height: 500px;
background: hsl(200,100%,97%);
}
.absolute-aligned img{
width: 50%;
min-width: 200px;
height: auto;
overflow: auto;
margin: auto;
position: absolute;
top:0;
left: 0;
bottom: 0;
right: 0;
}
</style>
</head>
<body>
<!--水平垂直居中-->
<div class="absolute-aligned">
<img src="img.png">
</div>
</body>
</html>方法5：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.center{
background: hsl(180,100%,97%);
position: relative;
min-height: 500px;
}
.center img{
position: absolute;
top:50%;
left: 50%;
transform: translate(-50%,-50%);
width: 30%;
height: auto;
}
</style>
</head>
<body>
<!--水平垂直居中-->
<div class="center">
<img src="img.png">
</div>
</body>
</html>方法6：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.center{
background: hsl(240,100%,97%);
display: flex;
justify-content: center;
align-items: center;
}
.center img{
width: 30%;
height: auto;
}
</style>
</head>
<body>
<!--水平居中-->
<div class="center">
<img src="img.png">
</div>
</body>
</html>方法7:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.center{
background: hsl(300,100%,97%);
min-height: 600px;
position: relative;
}
.center img{
width: 40%;
height: auto;
position: absolute;
top:calc(50% - 20%);
left: calc(50% - 20%);
}
</style>
</head>
<body>
<!--水平居中-->
<div class="center">
<img src="img.png">
</div>
</body>
</html>