Java - Write hashmap to a csv file

Question

I have a hashmap with a String key and String value. It contains a large number of keys and their respective values.

For example:

key | value
abc | a         


        

Answer 1

 Map csvMap = new TreeMap<>();
        csvMap.put("Hotel Name", hotelDetails.getHotelName());
        csvMap.put("Hotel Classification", hotelDetails.getClassOfHotel());
        csvMap.put("Number of Rooms", hotelDetails.getNumberOfRooms());
        csvMap.put("Hotel Address", hotelDetails.getAddress());


        // specified by filepath
        File file = new File(fileLocation + hotelDetails.getHotelName() + ".csv");

        // create FileWriter object with file as parameter
        FileWriter outputfile = new FileWriter(file);

        String[] header = csvMap.keySet().toArray(new String[csvMap.size()]);
        String[] dataSet = csvMap.values().toArray(new String[csvMap.size()]);

        // create CSVWriter object filewriter object as parameter
        CSVWriter writer = new CSVWriter(outputfile);


        // adding data to csv
        writer.writeNext(header);
        writer.writeNext(dataSet);


        // closing writer connection
        writer.close();
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }