<!DOCTYPE html>
<html lang="en">
<head>
??? <meta charset="UTF-8">
??? <title>Title</title>
??? <style type="text/css" rel="stylesheet">
??????? *{margin: 0;padding: 0;}
??????? html{
??????????? height: 100%
??????? }
??????? body{
??????????? height: 100%;
??????????? background: url(wallpaper.jpg) no-repeat;
??????????? background-size: 100% 100%;
??????? }
???</style>
</head>
<body>
</body>
</html>
图片全屏显示代码-css3
原文地址：https://www.cnblogs.com/qikeyishu/p/9099617.html