本文着重为大家仔细讲解了jquery实现上传图片功能，文中代码实例讲解的非常细致，希望能够帮助到您，欢迎大家阅读和收藏
代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>点击头像上传图片</title>
<style>
*{
margin:0;
padding: 0;
}
div,#avarimgs,#xdaTanFileImg{
width: 100px;
height: 100px;
}
div{
margin:50px auto;
position: relative;
}
#xdaTanFileImg{
position: absolute;
top: 0;
left: 0;
opacity: 0;
}
</style>
</head>
<body>
<div>
<input type="file" name="pclogo" id="xdaTanFileImg" onchange="xmTanUploadImg(this)" accept="image/*">
<img src="/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=3787285033,4172246344&fm=26&gp=0.jpg" class="img-circle img-thumbnail img-responsive" id="avarimgs">
</div>
</body>
<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
<script type="text/javascript">
if (typeof FileReader == 'undefined') {
document.getElementById("xmTanDiv").InnerHTML = "<h1>当前浏览器不支持FileReader接口</h1>";
document.getElementById("xdaTanFileImg").setAttribute("disabled", "disabled");
}
//选择图片，马上预览
function xmTanUploadImg(obj) {
console.log(obj)
var file = obj.files[0];
console.log(obj);console.log(file);
console.log("file.size = " + file.size);
var reader = new FileReader();
reader.onloadstart = function (e) {
console.log("开始读取....");
}
reader.onprogress = function (e) {
console.log("正在读取中....");
}
reader.onabort = function (e) {
console.log("中断读取....");
}
reader.onerror = function (e) {
console.log("读取异常....");
}
reader.onload = function (e) {
console.log("成功读取....");
var img = document.getElementById("avarimgs");
img.src = e.target.result;
//或者 img.src = this.result; //e.target == this
}
reader.readAsDataURL(file)
}
</script>
</html>
