import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
private static final ThreadLocal<Session> threadLocal=new ThreadLocal<Session>();
//为保证线程安全,将Seeeion放到ThreadLocal中管理。这样就避免了Session的多线程共享数据的问题
private static final ThreadLocal<Session> threadLocal=new ThreadLocal<Session>();
//为保证线程安全,将Seeeion放到ThreadLocal中管理。这样就避免了Session的多线程共享数据的问题
private static SessionFactory sessionFactory=null;
static {
try {
Configuration cfg=new Configuration().configure();
sessionFactory =cfg.buildSessionFactory();
} catch (HibernateException e) {
// TODO Auto-generated catch block
System.out.println("创建会话工厂失败");
e.printStackTrace();
}
}
public static Session getSession() throws HibernateException{
Session session=(Session)threadLocal.get();
if (session==null||!session.isOpen()) {
if (sessionFactory==null) {
rebuildSessionFactory();
}
session=(sessionFactory!=null)?sessionFactory.openSession():null;
threadLocal.set(session);//并且为了线程安全,将它放进线程锁中
}
return session;
}
public static void rebuildSessionFactory() {
// TODO Auto-generated method stub
try {
Configuration cfg=new Configuration().configure();
sessionFactory=cfg.buildSessionFactory();
} catch (HibernateException e) {
// TODO Auto-generated catch block
System.out.println("创建会话工厂失败");
e.printStackTrace();
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
public static void closeSession() throws HibernateException{
Session session=(Session)threadLocal.get();
threadLocal.set(null);
if (session!=null) {
session.close();
}
}
}
static {
try {
Configuration cfg=new Configuration().configure();
sessionFactory =cfg.buildSessionFactory();
} catch (HibernateException e) {
// TODO Auto-generated catch block
System.out.println("创建会话工厂失败");
e.printStackTrace();
}
}
public static Session getSession() throws HibernateException{
Session session=(Session)threadLocal.get();
if (session==null||!session.isOpen()) {
if (sessionFactory==null) {
rebuildSessionFactory();
}
session=(sessionFactory!=null)?sessionFactory.openSession():null;
threadLocal.set(session);//并且为了线程安全,将它放进线程锁中
}
return session;
}
public static void rebuildSessionFactory() {
// TODO Auto-generated method stub
try {
Configuration cfg=new Configuration().configure();
sessionFactory=cfg.buildSessionFactory();
} catch (HibernateException e) {
// TODO Auto-generated catch block
System.out.println("创建会话工厂失败");
e.printStackTrace();
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
public static void closeSession() throws HibernateException{
Session session=(Session)threadLocal.get();
threadLocal.set(null);
if (session!=null) {
session.close();
}
}
}
纯粹是因为懒
