Using aggregation with Spring JDBC

By your design, you should be able just to add appropriate columns to the insert query, and update parameters:

// EmployeeDAOImpl

private final static String INSERT_EMPLOYEE = "insert into employee (id, name, surname, age, gender, contact, address, city, country) values (?,?,?,?,?,?,?,?,?)";

// ...
@Override
    public void saveEmployee(Employee employee) throws SQLException {
        try {
            Connection connection = dataSource.getConnection();
            PreparedStatement preparedStatement = connection.prepareStatement(INSERT_EMPLOYEE);
            preparedStatement.setInt(1, employee.getId());
            preparedStatement.setString(2, employee.getName());
            preparedStatement.setString(3, employee.getSurname());
            preparedStatement.setInt(4, employee.getAge());
            preparedStatement.setString(5, employee.getGender());
            preparedStatement.setString(6, employee.getContact());
            //index 7,8 and 9 are address, city and country...
            preparedStatement.setString(7, employee.getAddress().getAddress());
            preparedStatement.setString(8, employee.getAddress().getCity());
            preparedStatement.setString(9, employee.getAddress().getCountry());

            preparedStatement.executeUpdate();
            preparedStatement.close();
            System.out.println("Employee is inserted..." + employee);

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

And set the fields in MainTest:

public class MainTest {

    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("EmployeeJDBC.xml");

        EmployeeDAO dao = context.getBean(EmployeeDAO.class);

        Address address = new Address("RandAddress", "RandCity", "RandCountry");
        Employee employee = new Employee(1, "John", "Doe", 24, "M", "+15555555555", address); 

        dao.saveEmployee(employee);

    }
}