经典泛型dao层代码，非常好用简易

package com.hps.dao;

import java.io.Serializable;
import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Restrictions;

/**
 * 
 * 通用DAO
 * 
 * @author User
 * 
 * @param <T>
 *            类型
 * @param <PK>
 *            主键
 */

@SuppressWarnings("unchecked")
public class DaoSupport<T, PK extends Serializable> {
private Class<T> entityClass;
private SessionFactory sessionFactory;

public DaoSupport(SessionFactory sessionFactory, Class entityClass) {
this.sessionFactory = sessionFactory;

this.entityClass = entityClass;
}

/**
 * ???sessionFactory???????session???? getCurrentSession??????????????????????????????????
 * 
 * @return Session
 */
public Session getSession() {
return this.sessionFactory.getCurrentSession();
}

/**
 * 通过对象更新
 * 
 * @param entity
 */
public void saveOrUpdate(T entity) {
getSession().saveOrUpdate(entity);
}

/**
 * 保存对象
 * 
 * @param entity
 */
public void save(T entity) {
getSession().save(entity);
}