statedaohibernate.java

是一个基于java开发的拍卖系统 非常适合初学者看

package com.wish.jhk.dao.impl;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.wish.jhk.dao.StateDao;
import com.wish.jhk.entity.State;
import com.wish.jhk.util.HibernateSessionFactory;

public class StateDaoHibernate implements StateDao {

	// 删除状态 id 需要删除的状态id

	public void delete(Integer id) {
		Session session = null;
		Transaction trans = null;

		try {
			session = HibernateSessionFactory.getSession();
			trans = session.beginTransaction();
			session.delete(session.get(State.class, id));
			trans.commit();
		} catch (Exception e) {
			e.printStackTrace();
			trans.rollback();
		} finally {
			session.close();
		}

	}

	// 删除状态 state 需要删除的状态

	public void delete(State state) {
		Session session = null;
		Transaction trans = null;

		try {
			session = HibernateSessionFactory.getSession();
			trans = session.beginTransaction();
			session.delete(state);
			trans.commit();
		} catch (Exception e) {
			e.printStackTrace();
			trans.rollback();
		} finally {
			session.close();
		}

	}

	// 查询全部状态 获得全部状态

	@SuppressWarnings("unchecked")
	public List<State> findAll() {
		Session session = null;
		Transaction trans = null;
		List<State> states = null;
		try {
			session = HibernateSessionFactory.getSession();
			trans = session.beginTransaction();
			String hql = "from State";
			Query query = session.createQuery(hql);
			states = query.list();
		} catch (Exception e) {
			e.printStackTrace();
			trans.rollback();
		} finally {
			session.close();
		}
		return states;
	}

	// 根据id查找状态 id 需要查找的状态id

	public State get(Integer id) {
		Session session = null;
		Transaction trans = null;
		State state = null;
		try {
			session = HibernateSessionFactory.getSession();
			trans = session.beginTransaction();
			state = (State) session.get(State.class, id);
			trans.commit();
		} catch (Exception e) {
			e.printStackTrace();
			trans.rollback();
		} finally {
			session.close();
		}
		return state;
	}

	// 增加状态 state 需要增加的状态

	public void save(State state) {
		Session session = null;
		Transaction trans = null;

		try {
			session = HibernateSessionFactory.getSession();
			trans = session.beginTransaction();
			session.save(state);
			trans.commit();
		} catch (Exception e) {
			e.printStackTrace();
			trans.rollback();
		} finally {
			session.close();
		}

	}

	// 修改状态 state 需要修改的状态

	public void update(State state) {
		Session session = null;
		Transaction trans = null;

		try {
			session = HibernateSessionFactory.getSession();
			trans = session.beginTransaction();
			session.update(state);
			trans.commit();
		} catch (Exception e) {
			e.printStackTrace();
			trans.rollback();
		} finally {
			session.close();
		}

	}

}