1, 做个简单的util

public class HibernateUtils {	private static SessionFactory sf;	static {		//加载主要的配置文件		sf = new Configuration().configure().buildSessionFactory();	}		// 打开session	public static Session getSession(){		return sf.openSession();	}}

 

2，做个Accounts的qrud接口

public interface AccountDaoInterface {		//增加	void save(Account emp);	//更新	void update(Account emp);	//查找	Account findById(Serializable id);	List
     
       getAll();	List
      
        getAll(String AccountName);	List
       
         getAll(int index, int count);	//删除	void delete(Serializable id);	}
       
      
     

　　

3，实现接口

public class AccountDao implements AccountDaoInterface {	@Override	public Account findById(Serializable id) {		Session session = null;		Transaction tx = null;		try {			//获取session			session = HibernateUtils.getSession();			//开启			tx = session.beginTransaction();			//进行查询			return (Account) session.get(Account.class, id);		} catch (Exception e) {			throw new RuntimeException(e);		} finally {			tx.commit();			session.close();		}	}	@Override	public List
     
       getAll() {		Session session = null;		Transaction tx = null;		try {			session = HibernateUtils.getSession();			tx = session.beginTransaction();			// HQL查询			Query q = session.createQuery("from Account");			return q.list();		} catch (Exception e) {			throw new RuntimeException(e);		} finally {			tx.commit();			session.close();		}	}	@SuppressWarnings("unchecked")	@Override	public List
      
        getAll(String AccountName) {		Session session = null;		Transaction tx = null;		try {			session = HibernateUtils.getSession();			tx = session.beginTransaction();			Query q =session.createQuery("from Account where empName=?");			// 索引从0开始			q.setParameter(0, AccountName);			// 进行查询			return q.list();		} catch (Exception e) {			throw new RuntimeException(e);		} finally {			tx.commit();			session.close();		}	}	@Override	public List
       
         getAll(int index, int count) {		Session session = null;		Transaction tx = null;		try {			session = HibernateUtils.getSession();			tx = session.beginTransaction();			Query q = session.createQuery("from Account");			// 设置分页参数			q.setFirstResult(index);  // 查询开始行数位置			q.setMaxResults(count);	  // 查询返回的行数						List
        
          list = q.list();			return list;		} catch (Exception e) {			throw new RuntimeException(e);		} finally {			tx.commit();			session.close();		}	}	@Override	public void save(Account emp) {		Session session = null;		Transaction tx = null;		try {			session = HibernateUtils.getSession();			tx = session.beginTransaction();			// 保存			session.save(emp);		} catch (Exception e) {			throw new RuntimeException(e);		} finally {			tx.commit();			session.close();		}			}	@Override	public void update(Account emp) {		Session session = null;		Transaction tx = null;		try {			session = HibernateUtils.getSession();			tx = session.beginTransaction();			//更新			session.update(emp);					} catch (Exception e) {			throw new RuntimeException(e);		} finally {			tx.commit();			session.close();		}			}	@Override	public void delete(Serializable id) {		Session session = null;		Transaction tx = null;		try {			session = HibernateUtils.getSession();			tx = session.beginTransaction();			// 先查询对象，然后判断删除			Object obj = session.get(Account.class, id);			if (obj != null) {				session.delete(obj);			}		} catch (Exception e) {			throw new RuntimeException(e);		} finally {			tx.commit();			session.close();		}	}	}
        
       
      
     

　　

4，简单使用

List
     
       accounts = new AccountDao().getAll();		for (int i = 0; i < accounts.size(); i++) {			Account account = accounts.get(i);			System.out.println(account.getName());		}