摘要： 1.实体:Java代码publicclassOrder{privateintid;privateDateorderDate;publicintgetId(){returnid;}publicvoidsetId(intid){this.id=id;}publicDategetOrderDate(){returnorderDate;}publicvoidsetOrderDate(DateorderDate){this.orderDate=orderDate;}@OverridepublicStringtoString(){return"Order[id="+id+"] 阅读全文