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;    }    @Override    public 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              sequence              native                          -->                        <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session    public static Session getSession(){        return sf.openSession();    }        //关闭Session        public 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;     @After    public void afterTest(){        tx.commit();        HibernateUtil.CloseSession();    }    @Before    public void initData(){        session=HibernateUtil.getSession();        tx=session.beginTransaction();    }        /*     * get方法查询     */    @Test    public void getData(){        Student stu=(Student)session.get(Student.class, 3);        System.out.println(stu);    }            /*     * 增加     */        @Test    public 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SessionFactory        SessionFactory fa=cfg.buildSessionFactory();    //加工Session    Session 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     */    @Test    public 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     */    @Test    public 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!");    }            }