OpenCSV - How to map selected columns to Java Bean regardless of order?

Question

I have a CSV file with the following columns: id, fname, telephone, lname, address.

I have a P

Answer 1

With opencsv, you can create a generic function like :

public static  void csvWriterUtil(Class beanClass, List data, String outputFile, String[] columMapping){
    try{
        Writer writer = new BufferedWriter(new FileWriter(outputFile));
        ColumnPositionMappingStrategy strategy = new ColumnPositionMappingStrategy<>();
        strategy.setType(beanClass);
        strategy.setColumnMapping(columMapping);
        StatefulBeanToCsv statefulBeanToCsv =new StatefulBeanToCsvBuilder(writer)
                .withMappingStrategy(strategy)
                .build();
        writer.write(String.join(",",columMapping)+"\n");
        statefulBeanToCsv.write(data);
        writer.close();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (CsvRequiredFieldEmptyException e) {
        e.printStackTrace();
    } catch (CsvDataTypeMismatchException e) {
        e.printStackTrace();
    }
}

Here you can pass only required columns through columMapping parameter. Code example is available in https://github.com/soumya-kole/JavaUtils/tree/master/CsvUtil