Hibernate_增删改

package com.etc.test;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import com.etc.dao.HibernateSessionFactory;
import com.etc.entity.Book;
public class Test1
{
static void update()//修改
{
//从工具类获取1条记录
Session s = HibernateSessionFactory.getSession();
//开启事务
s.beginTransaction();
try
{
//执行修改
Book book=new Book("老黑传",100f,"老白",100f);
book.setBid(12);
s.update(book);//修改
}
catch (Exception e)
{
e.printStackTrace();
s.getTransaction().rollback();//回滚事务
}
//提交事务
s.getTransaction().commit();
System.out.println("修改成功！");
//关闭连接
HibernateSessionFactory.closeSession();
}
static void delete()//删除
{
//从工具类获取1条记录
Session s = HibernateSessionFactory.getSession();
//开启事务
s.beginTransaction();
try
{
//执行删除
//删除必须先精确查出来
Book book=(Book) s.get(Book.class, 11);
s.delete(book);//删除
}
catch (Exception e)
{
e.printStackTrace();
s.getTransaction().rollback();//回滚事务
}
//提交事务
s.getTransaction().commit();
System.out.println("删除成功！");
//关闭连接
HibernateSessionFactory.closeSession();
}
static void add()//添加
{
Book book = new Book("老黑传",100f,"老黑",100f);
//从工具类获取1条记录
Session s = HibernateSessionFactory.getSession();
//开启事务
s.beginTransaction();
try
{
//执行插入
s.save(book);
}
catch (Exception e)
{
e.printStackTrace();
s.getTransaction().rollback();//回滚事务
}
//提交事务
s.getTransaction().commit();
System.out.println("插入成功！");
//关闭连接
HibernateSessionFactory.closeSession();
}
static void tudo()//不使用工具类的查询
{
//加载配置文件
Configuration config=new Configuration().configure();
//获取Hibernate的连接工厂
SessionFactory fac=config.buildSessionFactory();
//从工厂获取1条连接
Session s=fac.openSession();
//执行查询
String hql="from Book";
List<Book> list=s.createQuery(hql).list();
//遍历结果
for(Book b:list)
{
System.out.println(b);
}
//关闭连接
s.close();
}
@SuppressWarnings("unchecked")
static void tudo2()//使用工具类的查询(推荐)
{
// 从工具类获取1条连接
Session s=HibernateSessionFactory.getSession();
//执行查询
String hql ="from Book.bname";
List<Book> list = s.createQuery(hql).list();
// 遍历结果
for(Book b:list)
{
System.out.println(b);
}
//关闭连接
HibernateSessionFactory.closeSession();
}
public static void main(String[] args)
{
//tudo();
tudo2();
//add();
//delete();
//update();
}

}