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

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wytten commented Jun 28, 2013

I also found a good article titled "Turn your JAVA Beans into a POI Excel Spreadsheet" at

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