public class Emp {    private Integer empId;//员工ID    private String empname; //员工姓名    public Integer getEmpId() {        return empId;    }    public void setEmpId(Integer empId) {        this.empId = empId;    }    public String getEmpname() {        return empname;    }    public void setEmpname(String empname) {        this.empname = empname;    }    }

<hibernate-configuration>   <session-factory>       <!-- 1.连接数据库的语句 -->        <property name="connection.driver_class">oracle.jdbc.OracleDriver</property>        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>        <property name="connection.username">scott</property>        <property name="connection.password">0123</property>                        <!-- 输出所有 SQL 语句到控制台。 -->        <property name="hibernate.show_sql">true</property>                 <!-- 在 log 和 console 中打印出更漂亮的 SQL。 -->        <property name="hibernate.format_sql">true</property>        <!-- 方言 -->        <property name="hibernate.dialect">    org.hibernate.dialect.Oracle10gDialect</property>             <!-- hbm2ddl -->          <property name="hibernate.hbm2ddl.auto">update</property>         <!-- 支持getCurrentSession的 属性配置 -->         <property name="hibernate.current_session_context_class">thread</property>       <!-- 关联小配置 -->             <!-- <mapping resource="cn/happy/entity/Project.hbm.xml"/> -->        <mapping resource="entity/Emp.hbm.xml"/>          </session-factory></hibernate-configuration>    

<?xml version="1.0" encoding="utf-8"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping package="entity">    <class name="Emp" table="Emp2">        <id name="empId" column="EMPID">            <generator class="native"></generator>        </id>        <property name="empname" type="string" column="empname"></property>                <!-- 多对多 -->        <!-- <set name="pros" table="ProEmp">            <key column="nid"></key>            <many-to-many class="Project" column="pid"></many-to-many>         </set>-->    </class></hibernate-mapping>

public class HibernateUtil {        private static final ThreadLocal sessionTL = new ThreadLocal();     private static Configuration configuration;    //    private  static final SessionFactory sessionFactory;    static{        try {            configuration=new Configuration().configure();            sessionFactory=configuration.buildSessionFactory();                                } catch (Exception e) {            throw new ExceptionInInitializerError(e);        }            }    public static Session getSession() {                Session session = (Session)sessionTL.get();        if(session==null)        {            session = sessionFactory.openSession();            sessionTL.set(session);        }        return session;    }    public static void closeSession()    {        Session session = (Session)sessionTL.get();        sessionTL.set(null);        session.close();            }}

package dao;import java.io.Serializable;import util.HibernateUtil;public class Mydao {    public Object  get(Class clazz,Serializable id){           System.out.println("dao\t"+HibernateUtil.getSession());           Object result= HibernateUtil.getSession().load(clazz, id);           return result;    }}

public class Hibernatebiz {    Mydao dao=new Mydao();    public Object get(Class clazz,Serializable id){          // Transaction tx = HibernateUtil.getSession().beginTransaction();           Object obj= dao.get(clazz, id);           System.out.println("==============================================");         //  tx.commit();          // HibernateUtil.closeSession();           return obj;    }}

public class MyFilter implements Filter{    public void destroy() {        // TODO Auto-generated method stub            }    public void doFilter(ServletRequest request, ServletResponse response,            FilterChain chain) throws IOException, ServletException {        Session session;        Transaction tx=null;        try {            session=HibernateUtil.getSession();            tx=session.beginTransaction();            chain.doFilter(request, response);            tx.commit();                    } catch (Exception e) {            e.printStackTrace();            tx.rollback();        }        finally{            HibernateUtil.closeSession();        }            }

public class H_01Test {    @Test    public void addTest(){        Hibernatebiz biz=new Hibernatebiz();        Object object = biz.get(Emp.class,1);        Emp emp=(Emp)object;        System.out.println(emp.getEmpname());            }}