我第一次在我的应用程序中使用spring batch和spring data jpa。Spring batch读取一个文本文件说aCode，aName，sCode。我有一个POJO，它Map这些键，如下所示，其中一个键是另一种类型的对象

public class Pojo{
  private AnotherObject sCode;  
  private String aName;
  private String aCode;
 }

下面是我在BatchConfiguration类中的读取器。我如何处理这个AnotherObject。我得到一个错误说：
由于：org.springframework.beans.NotWritablePropertyException：Bean类[Pojo]的属性“sCode”无效：在输入键中找到此属性的距离〈= 5的重复匹配：[“sCode”，“aCode”，“aName”]。（考虑减小距离限制或更改输入键名称以获得更接近的匹配。）

@Bean
  @StepScope
  public FlatFileItemReader<Area> reader(
      @Value("#{stepExecutionContext[fromId]}") final String fromId,
      @Value("#{stepExecutionContext[toId]}") final String toId,
      @Value("#{stepExecutionContext[name]}") final String name) {
    FlatFileItemReader<Area> reader = new FlatFileItemReader<>();
    try{

      reader.setResource(new ClassPathResource("area_temp.txt"));   
      LineMapper<Area> areaMapper = createAreaLineMapper();
      reader.setLineMapper(areaMapper);
    }
    catch(Exception e){
      e.printStackTrace();
    }
    return reader;
  }

  private LineMapper<Area> createAreaLineMapper() {
    DefaultLineMapper<Area> areaLineMapper = new DefaultLineMapper<>();

    LineTokenizer areaTokenizer = createAreaTokenizer();
    areaLineMapper.setLineTokenizer(areaTokenizer);

    FieldSetMapper<Area> areaInformationMapper = createAreaInformationMapper();
    areaLineMapper.setFieldSetMapper(areaInformationMapper);

    return areaLineMapper;
}

 private LineTokenizer createAreaTokenizer() {
    DelimitedLineTokenizer areaLineTokenizer = new DelimitedLineTokenizer();
    areaLineTokenizer.setDelimiter("|");
    areaLineTokenizer.setNames(new String[]{"sCode","aCode","aName"});
    return areaLineTokenizer;
}
 private FieldSetMapper<Area> createAreaInformationMapper() {
    BeanWrapperFieldSetMapper<Area> areaMapper = new BeanWrapperFieldSetMapper<>();
    areaMapper.setTargetType(Area.class);
    return areaMapper;
}