Populate a Data Repository

PopulateRepository.java

@Component
public class PopulateRepository implements CommandLineRunner {
  
  @Value("classpath:path/to/file.csv")
  private Resource csvResource;
  
  private final DataRepository dataRepository;
  
  @Autowired
  public PopulateRepository(DataRepository dataRepository) {
    this.dataRepository = dataRepository;
  }
  
  public void run(String... args) throws Exception {
    BufferedReader reader = new BufferedReader(new InputStreamReader(csvResource.getInputStream()));
    String line = null;
    
    while ((line = reader.readLine()) != null) {
      // ... parse the csv line into an object ...
      Data data = parseCsvLine(line);
      
      dataRepository.save(data);
    }
    
    reader.close();
  }
  
}