先看看效果图：
1.sql
①t_orderitem一个外键
bname:方便后期book删除
CREATE TABLE `t_orderitem` (
`orderItemId` char(32) NOT NULL,
`quantity` int(11) DEFAULT NULL,
`subtotal` decimal(8,2) DEFAULT NULL,
`bid` char(32) DEFAULT NULL,
`bname` varchar(200) DEFAULT NULL,
`currPrice` decimal(8,2) DEFAULT NULL,
`image_b` varchar(100) DEFAULT NULL,
`oid` char(32) DEFAULT NULL,
PRIMARY KEY (`orderItemId`),
KEY `FK_t_orderitem_t_order` (`oid`),
CONSTRAINT `FK_t_orderitem_t_order` FOREIGN KEY (`oid`) REFERENCES `t_order` (`oid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
insert into `t_orderitem`(`orderItemId`,`quantity`,`subtotal`,`bid`,`bname`,`currPrice`,`image_b`,`oid`) values ('01D2DF3E5BB34E9F9D2477180C8D94D3',1,'74.50','CE01F15D435A4C51B0AD8202A318DCA7','Java编程思想（第4版）','74.50','book_img/9317290-1_b.jpg','C0841F4DFE7A43BFB183E4E82AE7914C');
②t_order一个外键
CREATE TABLE `t_order` (
`oid` char(32) NOT NULL,
`ordertime` char(19) DEFAULT NULL,
`total` decimal(10,2) DEFAULT NULL,
`status` int(11) DEFAULT NULL,
`address` varchar(1000) DEFAULT NULL,
`uid` char(32) DEFAULT NULL,
PRIMARY KEY (`oid`),
KEY `FK_t_order_t_user` (`uid`),
CONSTRAINT `FK_t_order_t_user` FOREIGN KEY (`uid`) REFERENCES `t_user` (`uid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
insert into `t_order`(`oid`,`ordertime`,`total`,`status`,`address`,`uid`) values ('058F48DA33694C6D8F5C2C13F3D26CEA','2013-12-26 21:47:04','95.30',1,'李女士 广东省 揭阳市 揭东县 xxx xxx xxx','32DB3700D2564254982BC58B0E4D95BC');
2.bean
①OrderItem
public class OrderItem {
private String orderItemId;//主键
private int quantity;//数量
private double subtotal;//小计
private Book book;//所关联的Book
private Order order;//所属的订单
②Order
public class Order {
private String oid;//主键
private String ordertime;//下单时间
private double total;//总计
private int status;
//订单状态：1未付款, 2已付款但未发货, 3已发货未确认收货, 4确认收货了交易成功, 5已取消(只有未付款才能取消)
private String address;//收货地址
private User owner;//订单的所有者
private List<OrderItem> orderItemList;
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
