<form id="uploadForm" class='display_inline' enctype="multipart/form-data">
<input id="orderFile" type="file" class="clip_0" name="file" accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"/>
</form>
var formData = new FormData($('#uploadForm')[0]);
formData.append("mapType", "baidu");
$.ajax({
url: '/upload/order',
type: 'POST',
data: formData,
processData: false, // 告诉jquery不要处理发送的数据
contentType: false // 告诉jquery不要设置content-Type请求头
}).done(function (res) {
}).fail(function (res) {
console.log("失败");
});