类分层结构
- java.lang.Object
- org.springframework.batch.sample.domain.order.Address
- org.springframework.batch.sample.domain.order.BillingInfo
- org.springframework.batch.sample.domain.order.Customer
- org.springframework.batch.sample.domain.order.LineItem
- org.springframework.batch.sample.domain.order.Order
- org.springframework.batch.sample.domain.order.ShippingInfo