上传文件js端处理

var formData = new FormData();
for (var i = 0; i < $("#files")[0].files.length; i++) {
    formData.append("file", $("#files")[0].files[i]);
 }

$.ajax({
  type: "post",
  url: '',
  data: formData,
  cache: false,
  processData: false,
  contentType: false,
  success: function (res) {
  }
})