You can do this:
private String cellToString(HSSFCell cell) {
CellType type;
Object result;
type = cell.getCellType();
switch (type) {
case NUMERIC : //numeric value in excel
result = cell.getNumericCellValue();
break;
case STRING : //String Value in Excel
result = cell.getStringCellValue();
break;
default :
throw new RuntimeException("There is no support for this type of value in Apche POI");
}
return result.toString();
}