问如何在没有xml的情况下使用具有不同数据、具有两个JdbcBatchItemWritter和JdbcBatchItemWritter配置的Spring批处理

EN

@Bean
public Step stepOne() {
    return stepBuilderFactory.get("stepOne")
            .<EmployeeDTO, EmployeeDTO> chunk(1)
            .reader(readerOne())
            .processor(processorOne())
            .writer(compositeWriter())
            .build();
}

@Bean
public CompositeItemWriter<EmployeeDTO> compositeWriter(){

    return new CompositeWriter();
}

public class CompositeWriter extends CompositeItemWriter<EmployeeDTO> {

   @Autowired
   private DataSource dataSource;

   List<EmployeeDTO> insert;
   List<EmployeeDTO> update;

   @Override
   public void write(List<? extends EmployeeDTO> arg0) throws Exception {
       CompositeItemWriter<EmployeeDTO> compositeItemWriter = new CompositeItemWriter<>();
       compositeItemWriter.setDelegates(Arrays.asList(insertW(),updateW()));
   }

   private JdbcBatchItemWriter<EmployeeDTO> insertW() throws Exception{
       JdbcBatchItemWriter<EmployeeDTO> batchItemWriter = new JdbcBatchItemWriter<>();
       batchItemWriter.setDataSource(dataSource);
       batchItemWriter.setSql("");
       batchItemWriter.write(insert);
       return batchItemWriter;
   }

   private JdbcBatchItemWriter<EmployeeDTO> updateW() throws Exception{
       JdbcBatchItemWriter<EmployeeDTO> batchItemWriter = new JdbcBatchItemWriter<>();
       batchItemWriter.setDataSource(dataSource);
       batchItemWriter.setSql("");
       batchItemWriter.write(update);
       return batchItemWriter;
   }
}