poi.openxml4j.exceptions.InvalidFormatException: Package should contain a content type part [M1.13]

FileInputStream file = new FileInputStream(new File("G:\\TestData\\test.xls"));
//Create Workbook instance holding reference to .xlsx file
XSSFWorkbook workbook = new XSSFWorkbook(file);
//Get first/desired sheet from the workbook
XSSFSheet sheet = workbook.getSheetAt(0);
//Iterate through each rows one by one
Iterator<Row> rowIterator = sheet.iterator();
while (rowIterator.hasNext()){
  Row row = rowIterator.next();
  //For each row, iterate through all the columns
  Iterator<Cell> cellIterator = row.cellIterator();
  while (cellIterator.hasNext()){
     Cell cell = cellIterator.next();
     //Check the cell type and format accordingly
     switch (cell.getCellType()){
        case Cell.CELL_TYPE_NUMERIC:
            System.out.print(cell.getNumericCellValue() + "t");
            break;
        case Cell.CELL_TYPE_STRING:
            System.out.print(cell.getStringCellValue() + "t");
            break;
     }
  }
  System.out.println("");
}
file.close();        

org.apache.poi.POIXMLException: org.apache.poi.openxml4j.exceptions.InvalidFormatException: Package should contain a content type part [M1.13]
    at org.apache.poi.util.PackageHelper.open(PackageHelper.java:41)
    at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:218)

//Create Workbook instance holding reference to .xlsx file
XSSFWorkbook workbook = new XSSFWorkbook(file);    

import org.apache.poi.ss.usermodel.Workbook; 
Workbook workbook = WorkbookFactory.create(file);