<!doctype html>
<html lang="en">
<head>
<Meta charset="UTF-8">
<Meta name="viewport"
content="width=device-width,user-scalable=no,initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0">
<Meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>ajax Upload demo</title>
</head>
<body>
<form id="uploadForm" enctype="multipart/form-data">
<input id="file" type="file" name="file"/>
<button id="upload" type="button">upload</button>
</form>
<img id="pre" src="#" width="800" height="600"/>
<button id="show" >show</button>
</body>
<script src="http://cdn.bootcss.com/jquery/3.1.0/jquery.js"></script>
<script>
$('#upload').click(upload);
$('#file').change(function(){
var reader = new FileReader();
reader.readAsDataURL($('#file')[0].files[0]);
reader.onload = function (e) {
$('#pre').attr('src',this.result)
}
})
function upload() {
var form = new FormData();
form.append("file",$('#file')[0].files[0]);
form.append("name","jdlsajdlkas");
form.append("order","1");
var settings = {
"async": true,"crossDomain": true,"url": "/attachments/","method": "POST","processData": false,"contentType": false,"mimeType": "multipart/form-data","data": form
}
$.ajax(settings).done(function (response) {
console.log(response);
});
}
</script>
</html>
原文地址：https://www.jb51.cc/ajax/161891.html
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