jquery版
效果
HTML
1 <button type="button" datatype="add">选择文件</button> 2 <p> 3 <span></span> 4 <i></i> 5 </p> 6 <input type="file" value="" multiple="multiple" accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel"/>