Export to CSV from JSP Page

The code snippet helps to export data from a jsp page which has fetched data from SQL Database into CSV format.

private static  void writeCsv(FileWriter writer , String [] array ) throws Exception{
  try{
   int sizeOfArr = array.length;
   int index = 0; 
   while(index < sizeOfArr){
    writer.append(array[index] == null ? "" : array[index]);
    if( index != (sizeOfArr-1)){
     writer.append(",");
    }else{
     writer.append('\n');
    }
    index++;
   }
  }catch(Exception e){
    e.printStackTrace();
    throw e;
  }
 }