Convert Excel file to XLS, XLSX, ODS, CSV and HTML in Java

import com.gembox.spreadsheet.*;

class Program {

    public static void main(String[] args) throws java.io.IOException {
        // If using the Professional version, put your serial key below.
        SpreadsheetInfo.setLicense("FREE-LIMITED-KEY");

        ExcelFile workbook = ExcelFile.load("%InputFileName%");

        // In order to achieve the conversion of a loaded Excel file to ODS,
        // or to some other Excel format,
        // we just need to save an ExcelFile object to desired output file format.
        workbook.save("Convert.%OutputFileType%");
    }
}