SpringMVC中的java自定义验证

Question

我想为我的实体实现自定义验证。这是我的实体。事实上，我想验证一个对象，并在它为null时从列表中删除它。 当我运行代码时，会发生此错误。 Bean属性“comment”不可读或具有无效的getter方法：getter的返回类型是否与setter的参数类型匹配

public class TypistData {
  private List<BasketData> baskets;
  private DateData orderDate;

  //getter and setter
}

public class BasketData {
 private HashedLong id;
 private CustomerData customer;
 private Long discount;
 private String comment;
 private HashedLong region;
 private List<OrderData> orders;

 //getter and setter
}

我的自定义验证是

  public class TypistDataValidation implements Validator {
@Override
public boolean supports(Class<?> aClass) {
    return aClass.isAssignableFrom(TypistData.class);
}

@Override
public void validate(Object o, Errors errors) {
    TypistData typistData = (TypistData)o;
    List<BasketData> basketDatas = typistData.getBaskets();

    if(typistData.getOrderDate()== null
        errors.rejectValue("orderDate","orderDate","can not be null");
    for(BasketData data:basketDatas){
        if(!isEmpty(data)){
            validateBasket(data,errors);
        } else basketDatas.remove(data);
    }
}

private boolean isEmpty(BasketData basketData){
    if(basketData.getCustomer()== null && basketData.getOrders().size()==0
                                       && basketData.getComment()== null
                                       && basketData.getDiscount()==null
                                       && basketData.getRegion()==null)
        return true;
    return false;

}
private void validateBasket(BasketData basketData,Errors errors){
    if(basketData.getRegion() == null)
        errors.rejectValue("region","can not be null");
     if(basketData.getDiscount()== null)
        errors.rejectValue("discount","can not be null");
    if(basketData.getComment() == null)
        errors.rejectValue("comment","can not be null");
    if(basketData.getOrders().size() == 0)
        errors.rejectValue("orders","can not be null");
    if(basketData.getCustomer() == null)
        errors.rejectValue("customer","can not be null"); 
}

}

Answer 1

在BasketData类中，应该有一个用于字段注释的getter方法

public String getComment() {
      return this.comment;
}