OpenCSV: How to create CSV file from POJO with custom column headers and custom column positions?

Question

I have created a MappingsBean class where all the columns of the CSV file are specified. Next I parse XML files and create a list of mappingbeans. Then I write that data int

Answer 1

This can be done using a HeaderColumnNameMappingStrategy along with a custom Comparator as well. Which is recommended by the official doc http://opencsv.sourceforge.net/#mapping_strategies

    File reportFile = new File(reportOutputDir + "/" + REPORT_FILENAME);
    Writer writer = new PrintWriter(reportFile);
    
final List order = List.of("TradeID", "GWML GUID", "MXML GUID", "GWML File", "MxML File", "MxML Counterparty", "GWML Counterparty");
    final FixedOrderComparator comparator = new FixedOrderComparator(order);
    HeaderColumnNameMappingStrategy strategy = new HeaderColumnNameMappingStrategy<>();
    strategy.setType(MappingsBean.class);
    strategy.setColumnOrderOnWrite(comparator);

    StatefulBeanToCsv beanToCsv = new
      StatefulBeanToCsvBuilder(writer)
      .withMappingStrategy(strategy)
      .build();
    beanToCsv.write(makeFinalMappingBeanList());
    writer.close();