Create an Excel spreadsheet from Groovy (Java) using Apache POI 3.9

apache-poi.groovy

def export = {
  // create a new file
  FileOutputStream out = new FileOutputStream("workbook.xls");
  // create a new workbook
  Workbook wb = new HSSFWorkbook();
  // create a new sheet
  Sheet s = wb.createSheet();
  
  int rownum = 0
  for (ClaimDocumentReferenceDTO ref : docRefs) {
    // create a row
    Row r = s.createRow(rownum++)
    for (int cellnum=0; cellnum <10; cellnum++) {
      Cell c = r.createCell(cellnum);
      c.setCellValue( "Test" );
    }
  }
  wb.write(out);
  out.close();
}

Here is my own version of Jeff Byrd's code that previously existed on that website:
https://gist.github.com/wytten/32be05889f84673d6187561699eeb253

Thanks for the information