static void Main(string[] args)
{
String xlsFile = @"D:\资料备份\资料\工作\测试\anythingToImage\from\test.xls";
String xlsxFile = @"D:\资料备份\资料\工作\测试\anythingToImage\from\test.xlsx";
String outputFile = @"D:\资料备份\资料\工作\测试\anythingToImage\to\";
ExcelUtils.ConvertToPDF(xlsFile, outputFile + xlsFile.Substring(xlsFile.LastIndexOf("\\")) + ".pdf");
ExcelUtils.ConvertToPDF(xlsxFile, outputFile + xlsxFile.Substring(xlsxFile.LastIndexOf("\\")) + ".pdf");
}