<property name="source.root" value="14.1/src"/><property name="class.root" value="14.1/classes"/><property name="lib.dir" value="lib"/><property name="schema.dir" value="14.1/schema"/>

ant  -file  build1.xml  run

public class BusinessService{public static SessionFactory sessionFactory;static{try{Configuration config = new Configuration();config.addClass(Company.class).addClass(HourlyEmployee.class).addClass(SalariedEmployee.class);sessionFactory = config.buildSessionFactory();}catch(Exception e){e.printStackTrace();}}public void saveEmployee(Employee employee) throws Exception{……}public List findAllEmployees() throws Exception{……}public Company loadCompany(long id) throws Exception{……}public void test() throws Exception{List employees=findAllEmployees();printAllEmployees(employees.iterator());Company company=loadCompany(1);printAllEmployees(company.getEmployees().iterator());Employee employee=new HourlyEmployee("Mary",300,company);saveEmployee(employee);}private void printAllEmployees(Iterator it){while(it.hasNext()){Employee e=(Employee)it.next();if(e instanceof HourlyEmployee){System.out.println(((HourlyEmployee)e).getRate());}elseSystem.out.println(((SalariedEmployee)e).getSalary());}}public static void main(String args[]) throws Exception {new BusinessService().test();sessionFactory.close();}}BusinessService的main()方法調用test()方法，test()方法依次調用以下方法。findAllEmployees()：檢索數據庫中所有的Employee對象。loadCompany()：加載一個Company對象。saveEmployee()：保存一個Employee對象。

List results=new ArrayList();tx = session.beginTransaction();List hourlyEmployees=session.find("from HourlyEmployee");results.addAll(hourlyEmployees);List salariedEmployees=session.find("from SalariedEmployee");results.addAll(salariedEmployees);tx.commit();return results;

select * from HOURLY_EMPLOYEES;select * from COMPANIES where ID=1;

select * from SALARIED_EMPLOYEES;

tx = session.beginTransaction();Company company=(Company)session.load(Company.class,new Long(id));List hourlyEmployees=session.find("from HourlyEmployee h where h.company.id="+id);company.getEmployees().addAll(hourlyEmployees);List salariedEmployees=session.find("from SalariedEmployee s where s.company.id="+id);
            company.getEmployees().addAll(salariedEmployees);tx.commit();return company;

tx = session.beginTransaction();session.save(employee);tx.commit();

Employee employee=new HourlyEmployee("Mary",300,company);saveEmployee(employee);

insert into HOURLY_EMPLOYEES(ID,NAME,RATE,CUSTOMER_ID)values(3, 'Mary',300,1);