ajax提交文件

form表单

<form method="post" enctype="multipart/form-data" action="">    <input name="file" type="file" accept=".txt,.html" multiple="multiple"/></form>

js

//获取文件表单数据var formData = new FormData($("#fileUploadForm")[0]);  $.ajax({     url: url,     type: 'POST',     data: formData,     dataType:"json",     async: false,     cache: false,     contentType: false,     processData: false,     success: function (data) {           alert(data.message);     },     error: function (data) {        alert("保存失败");     }});