public class Student {private Integer sid;private Integer age;private String name;public Integer getSid() {return sid;}public void setSid(Integer sid) {this.sid = sid;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}@Overridepublic String toString() {return "Student [sid=" + sid + ", age=" + age + ", name=" + name + "]";}}

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC"-//Hibernate/Hibernate Configuration DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration><session-factory><!-- Database connection settings 数据库连接设置--><!-- 驱动类 --><property name="connection.driver_class">oracle.jdbc.OracleDriver</property><!-- url地址 --><property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl3</property><property name="connection.username">wj</property><property name="connection.password">9090</property><!-- SQL dialect  (SQL 方言) --><property name="dialect">org.hibernate.dialect.Oracle10gDialect</property><!--在控制台打印后台的SQL语句 --><property name="show_sql">true</property><!-- 格式化显示SQL --><!-- <property name="format_sql">true</property> --><!-- 自动生成student表 --><property name="hbm2ddl.auto">update</property>  <!-- 关联小配置 --><mapping resource="cn/happy/entity/Student.hbm.xml" /><!-- <mapping class="cn.happy.entity.Grade"/> --></session-factory></hibernate-configuration>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC"-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping package="cn.happy.entity"><class name="Student" table="STUDENT"><id name="sid" column="SID"><!-- 主键生成策略：native:native:如果后台是Oracle  后台是MySQL，自动应用自增assigned:程序员给主键赋值uuid:32位的16进制数sequencenative--><generator class="assigned"><param name="sequence">SEQ_NUM</param></generator></id><!--  <version name="version"></version> --><property name="name" type="string" column="NAME"/><property name="age"/></class>
</hibernate-mapping>

private static Configuration cf=new Configuration().configure();private static SessionFactory sf=cf.buildSessionFactory();//方法返回sessionpublic static Session getSession(){return sf.openSession();}//关闭Sessionpublic static void CloseSession(){getSession().close();}

package cn.happy.test;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;import org.junit.After;
import org.junit.Before;
import org.junit.Test;import cn.happy.entity.Student;
import cn.happy.util.HibernateUtil;public class Test1 {Session session;Transaction tx; @Afterpublic void afterTest(){tx.commit();HibernateUtil.CloseSession();}@Beforepublic void initData(){session=HibernateUtil.getSession();tx=session.beginTransaction();}/** get方法查询*/@Testpublic void getData(){Student stu=(Student)session.get(Student.class, 3);System.out.println(stu);}/** 增加*/@Testpublic void addData(){Student stu=new Student();stu.setSid(12);stu.setAge(11);stu.setName("李小龙1");//读取大配置文件 获取连接信息Configuration cfg=new Configuration().configure();//创建SessionFactorySessionFactory fa=cfg.buildSessionFactory();//加工SessionSession se=fa.openSession();Transaction tx = se.beginTransaction();//保存se.save(stu);//事务提交tx.commit();se.close();System.out.println("Save ok!");}/** 删除*/@Testpublic void delData(){Session session=HibernateUtil.getSession();Student stu=new Student();stu.setSid(2);Transaction tx=session.beginTransaction();session.delete(stu);tx.commit();HibernateUtil.CloseSession();System.out.println("del ok!");}/** 修改*/@Testpublic void updateData(){Session session=HibernateUtil.getSession();        Student stu=(Student)session.load(Student.class,3);stu.setName("呵呵");Transaction tx=session.beginTransaction();session.update(stu);tx.commit();HibernateUtil.CloseSession();System.out.println("update ok!");}}