input file 类型为excel表格

以下为react写法，可自行改为html的

<div className="flag-tip">

                            请上传excel表格, 后缀名为.csv, .xls, .xlsx的都可以

                        </div>

                        <form action="" method="post" enctype="multipart/form-data"  id="uploadForm">

                            <!--For CSV files (.csv),use: .csv;

                            For Excel Files 2003-2007 (.xls), use: application/vnd.ms-excel;

                            For Excel Files 2010 (.xlsx), use: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

                            -->

                            <input id="fileSelect" className="file" type="file" name="upload" onChange={self.submitFile.bind(self, type)} accept=".csv, application/vnd.ms-excel, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" />

                        </form>