j2ee之页面无刷新上传附件

//上传附件var uploadAnnex = function(){ ???//alert("??"); ???//document.getElementById(‘submitFile‘).onclick = function(event){ ???????var applicationId = $("#applicationId").val(); ???????if(event.preventDefault){//取消按钮默认提交行为 ???????????event.preventDefault(); ???????} else { ???????????event.returnValue = false; ???????} ???????var formDOM = document.getElementById(‘fileForm‘); ???????var formData = new FormData(formDOM);//创建formData对象 ???????var req = new XMLHttpRequest(); ???????req.open("POST", ?baseUrl +"/suspicious/upLoadFile?applicationId="+applicationId);//使用POST发送请求 ???????req.onload = function(event){ ???????????if(this.status === 200){ ???????????????console.log(this.response);//请求成功后打印返回的结果 ???????????} ???????} ???????req.send(formData); ???????req = null; ???//}}