kinddaohibernate.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.KindDao;
import com.wish.jhk.entity.Kind;
import com.wish.jhk.util.HibernateSessionFactory;

public class KindDaoHibernate implements KindDao {

	// 删除种类 id 需要删除的种类id
	public void delete(Integer id) {
		Session session = null;
		Transaction trans = null;

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

	}

	// 删除种类 kind 需要删除的种类
	public void delete(Kind kind) {
		Session session = null;
		Transaction trans = null;

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

	}

	// 查询全部种类 获得全部种类

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

	// 根据id查找种类 id 需要查找的种类id
	public Kind get(Integer id) {
		Session session = null;
		Transaction trans = null;
		Kind kind = null;
		try {
			session = HibernateSessionFactory.getSession();
			trans = session.beginTransaction();
			kind = (Kind) session.get(Kind.class, id);
		} catch (Exception e) {
			e.printStackTrace();
			trans.rollback();
		} finally {
			session.close();
		}
		return kind;
	}

	// 增加种类 kind 需要增加的种类
	public void save(Kind kind) {
		Session session = null;
		Transaction trans = null;

		try {
			session = HibernateSessionFactory.getSession();
			trans = session.beginTransaction();
			// System.out.println(kind.getKindName());
			// System.out.println(kind.getKindDesc());
			session.save(kind);
			trans.commit();
		} catch (Exception e) {
			e.printStackTrace();
			trans.rollback();
		} finally {
			session.close();
		}

	}

	// 修改种类 kind 需要修改的种类
	public void update(Kind kind) {
		Session session = null;
		Transaction trans = null;

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

	}

}