hibernate实现员工增删改查

public class Department implements java.io.Serializable {
	private Integer deptno;//部门号
	private String dname;//部门名字
	private Set employees = new HashSet(0);
         //省略get,set方法
}

public class Employee implements java.io.Serializable {
	private Integer empno;//雇员ID
	private Department department;//部门
	private String ename;//名字
	private String job;//职位
	private Date hiredate;//职日期
	private Double sal;//薪水
	private String pictureuri;//照片
}

//查询所有员工
Session se=HibernateSessionFactory.getSession();
		String sql="from Employee";
		List<Employee> empList=se.createQuery(sql).list();
		for (Employee emp : empList) {
			System.out.print(emp.getEname());
			System.out.println(emp.getDepartment().getDname());
		}
//或者以下
		List<Employee> empList= se.createCriteria(Employee.class).createCriteria("department").list();
		for (Employee emp : empList) {
			System.out.print(emp.getEname());
			System.out.println(emp.getDepartment().getDname());
		}

//根据一个ID删除一名员工
		Employee emp=(Employee) se.get(Employee.class, 202);
		se.delete(emp);
		se.beginTransaction().commit();

//新增一名员工 
//要记得在映射文件里写上自己建数据库时的自增序列（ORACLE数据库）
<id name="empno" type="java.lang.Integer">
       <column name="EMPNO" precision="8" scale="0" />
       <generator class="sequence">
            <param name="sequence">seq_emp</param>
       </generator>
</id>
Employee emp=new Employee();
		emp.setEname("abcde");
		se.save(emp);
		se.beginTransaction().commit();

//根据用户所选条件动态组合查询
	public List<Employee> findEmployee(Employee emp){
		List<Employee> empList =null;
		Criteria criteria=getSession().createCriteria(Employee.class);
		if(emp!=null){
			if(!emp.getEname().trim().equals("")){
				criteria.add(Restrictions.like("ename", "%"+emp.getEname().trim()+"%"));
			}
			if(emp.getDepartment().getDeptno()>0){
				criteria.add(Restrictions.eq("department.deptno", emp.getDepartment().getDeptno()));
			}
			if(emp.getHiredate()!=null){
				criteria.add(Restrictions.like("hiredate", emp.getHiredate()));
			}
			if(emp.getMaxsal()>0&&emp.getMinsal()>0){
				criteria.add(Restrictions.between("sal", emp.getMinsal(), emp.getMaxsal()));
			}
			criteria=criteria.createCriteria("department");
			empList=criteria.list();
		}
		return empList;
	}