Apache POI creating corrupt XLSX files

I'm trying to create a simple Excel file in XLSX format.
I can create the old XLS files but when I try to create the other format, the file is always corrupt.

I'm using Apache POI 4.1.1.

This is my simple code:

Workbook wb = new XSSFWorkbook();
	
Sheet sheet = wb.createSheet("new sheet");
        
Row row = sheet.createRow(0);
Cell cell = row.createCell(0);
cell.setCellValue("Hellooooo");
        
FileOutputStream fo = new FileOutputStream("C:/Users/Public/invoice_file/Test.xlsx");
		
try {
			
	wb.write(fo);
	fo.flush();
	fo.close();	
	wb.close();
			
}catch (Exception e) {
	e.printStackTrace();
}

And this is the error message: Error

Use

org.apache.poi.ss.usermodel.WorkbookFactory

//Parameter indicates whether you want to create an XSSF formatted file or not
WorkbookFactory.create(true);  //true creates XSSF formatted file

will return you an instance of

org.apache.poi.ss.usermodel.Workbook

Then you can write to the file using

Workbook.write(OutputStream)

Solution:

try (Workbook wb = WorkbookFactory.create(true)) {
    Sheet sheet = wb.createSheet("new sheet");
    Row row = sheet.createRow(0);
    Cell cell = row.createCell(0);
    cell.setCellValue("Hellooooo");
    try (FileOutputStream fos = new FileOutputStream("D:/Test.xlsx")) {
        wb.write(fos);
    }
}