注意：这里区分了是同步还是异步
同步的回调走 filebatchuploadsuccess（我把所有的都试了，才发现同步时会走这个方法）
异步的回调走 fileuploaded
配置项
uploadAsync: false,//同步上传
官方文档
http://bootstrap-fileinput.com/events.html
//初始化头像上传插件
$("#portrait").fileinput({
language: 'zh', //设置语言
showUpload: false,
elErrorContainer: '#kartik-file-errors',
allowedFileExtensions: ["jpg", "JPG", "jpeg", "JPEG", "png", "gif"],
dropZoneEnabled: false,
maxFileCount: 1,
uploadAsync: false,//异步上传
uploadUrl: "../upload/file/1",//图片上传的url
enctype:'multipart/form-data',
previewFileIcon: "",
maxImageWidth: 200,
resizeImage: false,
showPreview: false
}).on("filebatchselected", function (event, data) {//选择即上传
if (data.length == 0) {
return;
}
}).on('fileuploaded', function (event, data) {//异步上传成功结果处理
}).on('fileerror', function (event, data, msg) {//异步上传失败结果处理
console.log(event, data, msg);
}).on('fileuploaderror', function (event, data, msg) {//异步上传失败结果处理
console.log(event, data, msg);
}).on('filebatchuploadsuccess', function(event,data,previewId,index) {//同步上传回调
});;
原文链接：https://blog.csdn.net/zhaohan___/article/details/94434399