首先搭建建构

引入jar包

 

创建实体类  Emp.java

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;    }    }

配置大配置

        
             
               
       
        oracle.jdbc.OracleDriver
               
       
        jdbc:oracle:thin:@localhost:1521:orcl
               
       
        scott
               
       
        0123
                               
               
       
        true
                        
               
       
        true
               
               
       
            org.hibernate.dialect.Oracle10gDialect
                    
                 
       
        update
                
                
       
        thread
              
                    
               
                 
      
     

配置  小配置

创建HibernateUtil工具类

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();            }}

搭建Dao

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;    }}

biz层

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;    }}

filter类

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();        }            }

最后编写测试类

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());            }}

结果：