struts2+hibernate 鞋店网站绝对经典

package com.HML.dao; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import java.util.List; import com.sun.org.apache.regexp.internal.recompile; public class ObjectDao<T> { // 创建session工厂 private static SessionFactory sessionFactory = null; // 创建session对像 private Session session = null; // 创建事物对象 Transaction tx = null; // 静态初始化hibernate配置文件 static { try { Configuration config=new Configuration().configure(); sessionFactory=config.buildSessionFactory(); } catch (Exception e) { System.out.print(e.getMessage()); } } //删除方法 public boolean deleteT(T deleT){ //实例一个session对象 Session session=sessionFactory.openSession(); try { //session与事物关联(开始事物) tx=session.beginTransaction(); //调用对象的删除方法 session.delete(deleT); //提交事物 tx.commit(); } catch (Exception e) { System.out.print(e); return false; } finally{ session.close(); } return true; } //保存方法 public boolean saveT(T saveT) { Session session=sessionFactory.openSession(); try { tx=session.beginTransaction(); session.save(saveT); tx.commit(); } catch (Exception e) { System.out.println(e); return false; }finally{ session.close(); } return true; } //更新方法 public boolean updateT(T updateT) { Session session=sessionFactory.openSession(); try { tx=session.beginTransaction(); session.update(updateT); session.close(); } catch (Exception e) { // TODO: handle exception System.out.println(e); return false; }finally{ session.close(); } return true; } //查询方法 返回一个list public java.util.List<T> queryListT(String hql){ session=sessionFactory.openSession(); //声明一个list对象 java.util.List<T> Mylist=null; try { Query MyQuery=session.createQuery(hql); Mylist=MyQuery.list(); } catch (Exception e) { System.out.println(e); }finally{ tx.commit(); session.close(); } return Mylist; } //查询方法返回一个对象 public T QueryFromT(String hql){ //声明一个T对象 T t=null; //实例sesssion对象 session=sessionFactory.openSession(); tx=session.beginTransaction(); try { Query Myquery=session.createQuery(hql); t=(T)Myquery.uniqueResult(); } catch (Exception e) { session.close(); }finally{ tx.commit(); session.close(); } return t; } //返回一个List public List queryListObiect(String hql) { //手动创建session session=sessionFactory.openSession(); tx=session.beginTransaction(); List mylist=null; try{ mylist=session.createQuery(hql).list(); }catch (Exception e) { System.out.println("调用返回一个list："+e); session.close(); } tx.commit(); session.close(); return mylist; } }