@Entity
@Table(name = "cz_user")
public class Users {
@Column(name = "user_id")
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer userId;
@Column(name = "user_name")
private String username;
@Column(name = "email")
private String email;
@Column(name = "password")
private String password;
@Column(name = "reg_time")
private Date regTime;
@OneToMany(cascade = CascadeType.ALL,orphanRemoval = true)
@JoinColumn(name = "user_id")//外键维护
private List addressList = new ArrayList();
public Users() {
}
//这里属性的get方法需要有,set方法不需要，当然你可以加上
@Entity
@Table(name = "cz_address")
public class Address {
@Column(name = "address_id")
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer addressId;
@Column(name = "consignee")
private String consignee;
@Column(name = "province")
private Integer province;
@Column(name = "city")
private Integer city;
@Column(name = "district")
private Integer district;
@Column(name = "street")
private String street;
@Column(name = "zipcode")
private String zipcode;
@Column(name = "telphone")
private String telphone;
@Column(name = "mobile")
private String mobile;
public Address() {
}
//这里属性的get方法需要有,set方法不需要，当然你可以加上
@Transactional
@Override
public void test() {
List addresses = new ArrayList();
Address consignee1 = new Address("consignee12", 12, 12, 12);
Address consignee2 = new Address("consignee22", 22, 22, 22);
Address consignee3 = new Address("consignee32", 32, 32, 32);
Address consignee4 = new Address("consignee42", 42, 42, 42);
addresses.add(consignee1);
addresses.add(consignee2);
addresses.add(consignee3);
addresses.add(consignee4);
Users users1 = new Users(null, "username2", "email2", "password2", new Date(), addresses);
userAddressDao.saveUser(users1);
if (addresses != null && addresses.size() > 0){
for (Address address : addresses) {
userAddressDao.updateAddress(address,users1.getUserId());
}
}
}
public void saveUser(Users users) {
getCurrentSession().save(users);
}
@Override
public void updateAddress(Address address,int user_id) {
int o = getCurrentSession().createQuery("update "+Address.class.getName()+" set user_id = :user_id where addressId = :addressId")
.setParameter("user_id",user_id)
.setParameter("addressId",address.getAddressId())
.executeUpdate();
logger.warn("外键成功:" + o);
}
这种单向一对多的级联保存，只需要保存"一方"，保存成功之后，“一方”，"多方"的主键会自动回填，然后再去更新外键。这种单向的一对多情况下，"多方"基本上我们是使用不到的。
一对多 双向@Entity
@Table(name = "cz_user")
public class Users {
@Column(name = "user_id")
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer userId;
@Column(name = "user_name")
private String username;
@Column(name = "email")
private String email;
@Column(name = "password")
private String password;
@Column(name = "reg_time")
private Date regTime;
@OneToMany(cascade = CascadeType.ALL,orphanRemoval = true,mappedBy = "users")
private List addressList = new ArrayList();
public Users() {
}
//这里属性的get方法需要有,set方法不需要，当然你可以加上
@Entity
@Table(name = "cz_address")
public class Address {
@Column(name = "address_id")
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer addressId;
@Column(name = "consignee")
private String consignee;
@Column(name = "province")
private Integer province;
@Column(name = "city")
private Integer city;
@Column(name = "district")
private Integer district;
@Column(name = "street")
private String street;
@Column(name = "zipcode")
private String zipcode;
@Column(name = "telphone")
private String telphone;
@Column(name = "mobile")
private String mobile;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "user_id")//外键
private Users users;
//这里属性的get方法需要有,set方法不需要，当然你可以加上
@Transactional
@Override
public void test() {
List addresses = new ArrayList();
Address consignee1 = new Address("consignee12", 12, 12, 12);
Address consignee2 = new Address("consignee22", 22, 22, 22);
Address consignee3 = new Address("consignee32", 32, 32, 32);
Address consignee4 = new Address("consignee42", 42, 42, 42);
addresses.add(consignee1);
addresses.add(consignee2);
addresses.add(consignee3);
addresses.add(consignee4);
Users users1 = new Users(null, "username2", "email2", "password2", new Date(), addresses);
userAddressDao.saveUser(users1);
if (addresses != null && addresses.size() > 0){
for (Address address : addresses) {
userAddressDao.updateAddress(address,users1.getUserId());
}
}
}
@Override
public void saveUser(Users users) {
getCurrentSession().save(users);
}
@Override
public void updateAddress(Address address,int user_id) {
int o = getCurrentSession().createQuery("update "+Address.class.getName()+" set user_id = :user_id where addressId = :addressId")
.setParameter("user_id",user_id)
.setParameter("addressId",address.getAddressId())
.executeUpdate();
logger.warn("外键成功:" + o);
}
这种单向一对多的级联保存，只需要保存"一方"，保存成功之后，“一方”，"多方"的主键会自动回填，然后再去更新外键。这种双向的一对多情况下，是使用最多的
上面两种情况的执行结果
Hibernate:
insert
into
cz_user
(email, password, reg_time, user_name)
values
(?, ?, ?, ?)
Hibernate:
insert
into
cz_address
(city, consignee, district, mobile, province, street, telphone, user_id, zipcode)
values
(?, ?, ?, ?, ?, ?, ?, ?, ?)
Hibernate:
insert
into
cz_address
(city, consignee, district, mobile, province, street, telphone, user_id, zipcode)
values
(?, ?, ?, ?, ?, ?, ?, ?, ?)
Hibernate:
insert
into
cz_address
(city, consignee, district, mobile, province, street, telphone, user_id, zipcode)
values
(?, ?, ?, ?, ?, ?, ?, ?, ?)
Hibernate:
insert
into
cz_address
(city, consignee, district, mobile, province, street, telphone, user_id, zipcode)
values
(?, ?, ?, ?, ?, ?, ?, ?, ?)
Hibernate:
update
cz_address
set
user_id=?
where
address_id=?
2021-11-16 15:07:33,193 WARN [com.xysd.ssh.repository.UserAddressDaoImpl] - 外键成功:1
Hibernate:
update
cz_address
set
user_id=?
where
address_id=?
2021-11-16 15:07:33,221 WARN [com.xysd.ssh.repository.UserAddressDaoImpl] - 外键成功:1
Hibernate:
update
cz_address
set
user_id=?
where
address_id=?
2021-11-16 15:07:33,251 WARN [com.xysd.ssh.repository.UserAddressDaoImpl] - 外键成功:1
Hibernate:
update
cz_address
set
user_id=?
where
address_id=?
2021-11-16 15:07:33,309 WARN [com.xysd.ssh.repository.UserAddressDaoImpl] - 外键成功:1
