Hibernate 系列教程14-继承-PerTable策略

Employee

public class Employee {
private Long id;
private String name;

HourlyEmployee

public class HourlyEmployee extends Employee {
private Double rate;

SalariedEmployee

public class SalariedEmployee extends Employee {
private Double salary;

Employee.hbm.xml

<class name="Employee" table="t_employee">
<id name="id">
<!-- 不能使用native的主键生成方式 -->
<generator class="org.hibernate.id.enhanced.TableGenerator" />
</id>
<property name="name" />
<!-- 在配置子类 -->
<union-subclass name="HourlyEmployee" table="t_HourlyEmployee">
<property name="rate" />
</union-subclass>
<union-subclass name="SalariedEmployee" table="t_SalariedEmployee">
<property name="salary" />
</union-subclass>
</class>

MainTest

public class MainTest {
Session session = null;
@Before
public void save() {
session = HibernateUtils.INSTANCE.getSession();
session.beginTransaction(); Employee employee = new Employee("jege"); HourlyEmployee hourlyEmployee = new HourlyEmployee();
hourlyEmployee.setName("hourly");
hourlyEmployee.setRate(200D); SalariedEmployee salariedEmployee = new SalariedEmployee();
salariedEmployee.setName("salaried");
salariedEmployee.setSalary(300D); session.save(employee);
session.save(hourlyEmployee);
session.save(salariedEmployee);
} @Test
public void get() {
Employee employee = (Employee) session.get(Employee.class, 1L);
System.out.println(employee.getName()); HourlyEmployee hourlyEmployee = (HourlyEmployee) session.get(HourlyEmployee.class, 2L);
System.out.println(hourlyEmployee.getName());
System.out.println(hourlyEmployee.getRate()); SalariedEmployee salariedEmployee = (SalariedEmployee) session.get(SalariedEmployee.class, 3L);
System.out.println(salariedEmployee.getName());
System.out.println(salariedEmployee.getSalary());
} @After
public void colse() {
session.getTransaction().commit();
session.close();
}
}

源码地址

https://github.com/je-ge/hibernate

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Hibernate 系列教程14-继承-PerTable策略

Hibernate 系列教程14-继承-PerTable策略

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