本文共 3329 字，大约阅读时间需要 11 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());
    }
}

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