参考博客地址:https://developer.mozilla.org/zh-CN/docs/Web/API/FormData/Using_FormData_Objects
参考博客地址:http://blog.csdn.net/ling_du/article/details/52192322
核心代码
var formElement = document.querySelector('input[type=file]').files[0]'); var formData = new FormData(formElement); var request = new XMLHttpRequest(); request.open("POST", "submitform.php"); formData.append("serialnumber", serialNumber++); request.send(formData);