studentdao.java

来自「Hibernate开发及整合应用大全 蔡雪焘编著 本书用典型的示例剖析Hiber」· Java 代码 · 共 59 行

package dao;

import java.util.ArrayList;
import java.util.List;

import model.Student;
import model.StudentVO;

import org.apache.commons.beanutils.BeanUtils;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import persistence.HibernateUtil;


public class StudentDAO extends BaseDAO {
	public static List getAllStu()
	{
		List list=null;
        List temp=new ArrayList();
		Transaction tx = null;
		try {
			Session session = HibernateUtil.currentSession();
			
			tx = session.beginTransaction();
			Query q = session.createQuery("from Student");
			temp=q.list();
            list=new ArrayList(temp.size());
            for(int i=0;i<temp.size();i++)
            {
                Student stu_po=(Student) temp.get(i);
                StudentVO stu_vo=new StudentVO();
                BeanUtils.copyProperties(stu_vo, stu_po);
                list.add(stu_vo);
            }
			
			tx.commit();
		} catch (Exception e) {
		   
			e.printStackTrace();
			try {
				tx.rollback();
			} catch (HibernateException e1) {
				e1.printStackTrace();
			}
		} finally {
			try {
				HibernateUtil.closeSession();
			} catch (HibernateException e1) {
				e1.printStackTrace();
			}
		}
		return list;
	}

}