本文共 3246 字，大约阅读时间需要 10 分钟。

Emp.java

public class Emp {    private Integer empId;    private String empname;    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????

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

Emp?????

HibernateUtil.java

public class HibernateUtil {    private static final ThreadLocal sessionTL = new ThreadLocal();    private static Configuration configuration;    private static 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();    }}

MyDao.java

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;    }}

HibernateBiz.java

public class HibernateBiz {    MyDao dao = new MyDao();    public Object get(Class clazz, Serializable id) {        Object obj = dao.get(clazz, id);        System.out.println("==============================================");        return obj;    }}

MyFilter.java

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());    }}