我正在使用 Hibernate 4，我想快速测试@OrderColumn注释，但尝试这样做时出现以下错误：
INFO [main] (SchemaExport.java:343) - HHH000227: Running hbm2ddl schema export
DEBUG [main] (SchemaExport.java:353) - Import file not found: /import.sql
DEBUG [main] (SqlStatementLogger.java:104) -
alter table Order
drop
foreign key FK48E972E19D16493
Hibernate:
alter table Order
drop
foreign key FK48E972E19D16493
ERROR [main] (SchemaExport.java:425) - HHH000389: Unsuccessful: alter table Order drop foreign key FK48E972E19D16493
ERROR [main] (SchemaExport.java:426) - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Order
drop
foreign key FK48E972E19D16493' at line 1
DEBUG [main] (SqlStatementLogger.java:104) -
drop table if exists Customer
Hibernate:
drop table if exists Customer
DEBUG [main] (SqlStatementLogger.java:104) -
drop table if exists Order
Hibernate:
drop table if exists Order
ERROR [main] (SchemaExport.java:425) - HHH000389: Unsuccessful: drop table if exists Order
ERROR [main] (SchemaExport.java:426) - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Order' at line 1
DEBUG [main] (SqlStatementLogger.java:104) -
create table Customer (
id integer not null auto_increment,
primary key (id)
)
Hibernate:
create table Customer (
id integer not null auto_increment,
primary key (id)
)
DEBUG [main] (SqlStatementLogger.java:104) -
create table Order (
id integer not null auto_increment,
number varchar(255),
customer_id integer,
orders_index integer,
primary key (id)
)
Hibernate:
create table Order (
id integer not null auto_increment,
number varchar(255),
customer_id integer,
orders_index integer,
primary key (id)
)
ERROR [main] (SchemaExport.java:425) - HHH000389: Unsuccessful: create table Order (id integer not null auto_increment, number varchar(255), customer_id integer, orders_index integer, primary key (id))
ERROR [main] (SchemaExport.java:426) - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Order (
id integer not null auto_increment,
number varchar(255),' at line 1
DEBUG [main] (SqlStatementLogger.java:104) -
alter table Order
add index FK48E972E19D16493 (customer_id),
add constraint FK48E972E19D16493
foreign key (customer_id)
references Customer (id)
Hibernate:
alter table Order
add index FK48E972E19D16493 (customer_id),
add constraint FK48E972E19D16493
foreign key (customer_id)
references Customer (id)
ERROR [main] (SchemaExport.java:425) - HHH000389: Unsuccessful: alter table Order add index FK48E972E19D16493 (customer_id), add constraint FK48E972E19D16493 foreign key (customer_id) references Customer (id)
ERROR [main] (SchemaExport.java:426) - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Order
add index FK48E972E19D16493 (customer_id),
add constrain' at line 1
INFO [main] (SchemaExport.java:405) - HHH000230: Schema export complete
以下是正在使用的代码：
客户.java
@Entity
public class Customer {
private Integer id;
private List<Order> orders;
@Id @GeneratedValue
public Integer getId() { return id; }
public void setId(Integer id) { this.id = id; }
@OneToMany(mappedBy="customer")
@OrderColumn(name="orders_index")
public List<Order> getOrders() { return orders; }
public void setOrders(List<Order> orders) { this.orders = orders; }
public void addOrder(Order order) {
this.orders.add(order);
order.setCustomer(this);
}
}
订单.java
@Entity
public class Order {
private Integer id;
private String number;
private Customer customer;
public Order() {}
public Order(String number) { this.number = number; }
@Id @GeneratedValue
public Integer getId() { return id; }
public void setId(Integer id) { this.id = id; }
public String getNumber() { return number; }
public void setNumber(String number) { this.number = number; }
@ManyToOne
@JoinColumn(name="customer_id")
public Customer getCustomer() { return customer; }
public void setCustomer(Customer customer) { this.customer = customer; }
}
测试客户端.java
public class Client {
public static void main(String[] args) {
SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
Session session = sessionFactory.openSession();
Transaction txn = session.beginTransaction();
//inserting data into tables
Customer leo = new Customer();
List<Order> orders = new ArrayList<Order>();
Order book = new Order("1-sia-2nd-edi");
Order mobile = new Order("2-son-wal");
Order ipod = new Order("3-ipo-app");
orders.add(book);orders.add(mobile);orders.add(ipod);
leo.setOrders(orders);
session.save(leo);
//retrieving data from tables
txn.commit();
session.close();
}
}
休眠.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password">pass</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/testdb</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto">create</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.format_sql">true</property>
<property name="hibernate.use_sql_comments">true</property>
<mapping class="com.transbinary.entity.Customer"/>
<mapping class="com.transbinary.entity.Order"/>
</session-factory>
</hibernate-configuration>
有人可以帮我理解为什么会出现这个错误吗？