package com.esailcar.finance.common.persistence;import java.io.Serializable;import java.lang.reflect.ParameterizedType;import java.lang.reflect.Type;import java.sql.SQLException;import java.util.List;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;import org.springframework.beans.factory.annotation.Autowired;public class MyHibernateDao<T,P extends Serializable> { ???????????private Class<T> entityClass; ???????//可以整合到Spring中,直接用Autowired注解,不需要在构造函数生成 ???private SessionFactory sessionFactory; ???????@SuppressWarnings("deprecation") ???public MyHibernateDao() ???{ ???????this.entityClass=getTClass(); ???????Configuration config=new Configuration().configure("hibernate-cfg.xml"); ???????this.sessionFactory=config.buildSessionFactory(); ???} ???????public void save(final T entity) ???{ ???????getSession().saveOrUpdate(entity); ???} ???????public T getById(final P id) ???{ ???????return (T) getSession().get(entityClass, id); ???} ???????public List<T> getByHql(String queryString)throws SQLException{ ???????????return getSession().createQuery(queryString).list(); ???} ???private ?Session getSession() ???{ ???????return sessionFactory.getCurrentSession(); ???} ???private ?Class<T> getTClass() ???{ ???????//获取直接超类的 Type 实例 ???????Type superClassType=getClass().getGenericSuperclass(); ???????try ???????{ ???????????if(superClassType instanceof ParameterizedType) ???????????{ ???????????????//参数化类型 ???????????????ParameterizedType parameterType=(ParameterizedType) superClassType; ???????????????????????????????//泛型参数的 Type 对象的数组 ???????????????Type[] parameters=parameterType.getActualTypeArguments(); ???????????????//返回实体类参数 ???????????????return (Class<T>)parameters[0]; ???????????????????????} ???????} ???????catch(Exception e) ???????{ ???????????System.out.println(e.getMessage()); ???????} ???????return null; ???}}Hibernate 泛型Dao实现
原文地址：http://www.cnblogs.com/temporary/p/7827408.html