xhr.open("POST", uri, true);
xhr.onreadystatechange = function() {
if (xhr.readyState == 4 && xhr.status == 200) {
// Handle response.
alert(xhr.responseText); // handle response.
}
};
fd.append('myFile', file);
// Initiate a multipart/form-data upload
xhr.send(fd);

var formData = new FormData();
var name = $("input").val();
formData.append("file",$("#upload")[0].files[0]);
formData.append("name",name);
$.ajax({ 
url : Url, 
type : 'POST', 
data : formData, 
// 告诉jQuery不要去处理发送的数据
processData : false, 
// 告诉jQuery不要去设置Content-Type请求头
contentType : false,
beforeSend:function(){
console.log("正在进行，请稍候");
},
success : function(responseStr) { 
if(responseStr.status===0){
console.log("成功"+responseStr);
}else{
console.log("失败");
}
}, 
error : function(responseStr) { 
console.log("error");
} 
});