hibernate学习――Set集合配置(二)
et1.add(new Certificate("MBA"));
set1.add(new Certificate("PMP"));
set1.add(new Certificate("MCA"));
/* Add employee records in the database */
Integer empID1 = ME.addEmployee("Manoj", "Kumar", 4000, set1);
HashSet set2 = new HashSet();
set2.add(new Certificate("BCA"));
set2.add(new Certificate("BA"));
Integer empID2 = ME.addEmployee("Dilip", "Kumar", 3000, set2);
ME.listEmployees();
/* Update employee's salary records */
ME.updateEmployee(empID1, 5000);
/* Delete an employee from the database */
ME.deleteEmployee(empID2); /* List down all the employees */
System.out.println("======================");
ME.listEmployees();
} /* Method to add an employee record in the database */
public Integer addEmployee(String fname, String lname, int salary, Set cert) {
Session session = factory.openSession();
Transaction tx = null;
Integer employeeID = null;
try {
tx = session.beginTransaction();
Employee employee = new Employee(fname, lname, salary);
employee.setCertificates(cert);
employeeID = (Integer) session.save(employee);
tx.commit();
} catch (HibernateException e) {
if (tx != null)
tx.rollback();
e.printStackTrace();
} finally {
session.close();
}
return employeeID;
} /* Method to list all the employees detail */
public void listEmployees() {
Session session = factory.openSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
List employees = session.createQuery("FROM Employee").list();
for (Iterator iterator1 = employees.iterator(); iterator1.hasNext();) {
Employee employee
= (Employee) iterator1.next();
System.out.print("First Name: " + employee.getFirstName());
System.out.print(" Last Name: " + employee.getLastName());
System.out.println(" Salary: " + employee.getSalary());
Set certificates = employee.getCertificates();
for (Iterator iterator2 = certificates.iterator(); iterator2
.hasNext();) {
Certificate certName = (Certificate) iterator2.next();
System.out.println("Certificate: " + certName.getName());
}
}
tx.commit();
} catch (HibernateException e) {
if (tx != null)
tx.rollback();
e.printStackTrace();
} finally {
session.close();
}
} /* Method to update salary for an employee */
public void updateEmployee(Integer EmployeeID, int salary) {
Session session = factory.openSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
Employee employee = (Employee) session.get(Employee.class,
EmployeeID);
employee.setSalary(salary);
session.update(employee);
tx.commit();
} catch (HibernateException e) {
if (tx != null)
tx.rollback();
e.printStackTrace();
} finally {
session.close();
}
} /* Method to delete an employee from the records */
public void deleteEmployee(Integer EmployeeID) {
Session session = factory.openSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
Employee employee = (Employee) session.get(Employee.class,
EmployeeID);
session.delete(employee);
tx.commit();
} catch (HibernateException e) {
if (tx != null)
tx.rollback();
e.printStackTrace();
} finally {
session.clo