HibernateUtils可以这样设计

package org.ks4j.utils;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.CriteriaSpecification;
import org.hibernate.criterion.Criterion;
import org.hibernate.criterion.Disjunction;
import org.hibernate.criterion.MatchMode;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Projection;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;
import org.hibernate.impl.CriteriaImpl;
import org.hibernate.transform.ResultTransformer;
import org.ks4j.orm.Compositor;
import org.ks4j.orm.Filtration;
import org.ks4j.orm.PageData;
import org.ks4j.orm.Filtration.MatchType;
import org.ks4j.orm.Compositor.CompositorType;
import org.ks4j.utils.ReflectionUtils;
import org.springframework.util.Assert;



/**
 * hibernate工具类
 * 
 *
 */
public class HibernateUtils
{
	/**
	 * 根据Criterion条件创建Criteria.
	 */
	public static Criteria createCriteria(Session session, Class entityClass, Criterion... criterions)
	{
		Criteria criteria = session.createCriteria(entityClass);
		for (Criterion criterion : criterions)
		{
			criteria.add(criterion);
		}
		return criteria;
	}

	/**
	 * 根据查询HQL与参数列表创建Query对象.
	 */
	public static Query createQuery(Session session, String hql, Object... values)
	{
		Assert.hasText(hql, "hql不能为空");
		Query query = session.createQuery(hql);

		for (int i = 0; i < values.length; i++)
		{
			query.setParameter(i, values[i]);
		}

		return query;
	}

	/**
	 * 根据查询HQL与参数列表创建Query对象.
	 */
	public static Query createQuery(Session session, String hql, Map<String, ?> values)
	{
		Assert.hasText(hql, "hql不能为空");
		Query query = session.createQuery(hql);
		if (values != null)
		{
			query.setProperties(values);
		}
		return query;
	}

	/**
	 * 创建Criterion
	 */
	private static Criterion createCriterion(String fieldName, Object fieldValue, MatchType matchType)
	{
		Criterion criterion = null;
		Assert.hasText(fieldName, "fieldName不能为空");
		switch (matchType)
		{
		case EQ: // =
			criterion = Restrictions.eq(fieldName, fieldValue);
			break;
		case LIKE: // like
			criterion = Restrictions.like(fieldName, (String) fieldValue, MatchMode.ANYWHERE);
			break;
		case LT: // <
			criterion = Restrictions.lt(fieldName, fieldValue);
			break;
		case LE: // <=
			criterion = Restrictions.le(fieldName, fieldValue);
			break;
		case GT: // >
			criterion = Restrictions.gt(fieldName, fieldValue);
			break;
		case GE: // >=
			criterion = Restrictions.ge(fieldName, fieldValue);
			break;
		}
		return criterion;
	}

	/**
	 * 执行count查询获得本次Criteria查询所能获得的对象总数.
	 */
	@SuppressWarnings("unchecked")
	private static long countCriteriaResult(Criteria criteria)
	{
		CriteriaImpl impl = (CriteriaImpl) criteria;

		// 先把Projection、ResultTransformer、OrderBy取出来,清空三者后再执行Count操作
		Projection projection = impl.getProjection();
		ResultTransformer resultTransformer = impl.getResultTransformer();

		List<CriteriaImpl.OrderEntry> orderEntries = null;
		orderEntries = (List) ReflectionUtils.getFieldValue(impl, "orderEntries");
		ReflectionUtils.setFieldValue(impl, "orderEntries", new ArrayList());

		// 执行Count查询
		long totalCount = (Long) criteria.setProjection(Projections.rowCount()).uniqueResult();

		// 将之前的Projection,ResultTransformer和OrderBy条件重新设回去
		criteria.setProjection(projection);

		if (projection == null)
		{
			criteria.setResultTransformer(CriteriaSpecification.ROOT_ENTITY);
		}
		if (resultTransformer != null)
		{
			criteria.setResultTransformer(resultTransformer);
		}

		ReflectionUtils.setFieldValue(impl, "orderEntries", orderEntries);

		return totalCount;
	}

	/**
	 * 设置排序参数到Criteria对象
	 */
	public static Criteria setCompositorParameter(Criteria criteria, Compositor compositor)
	{
		if (compositor != null)
		{
			String fieldName = compositor.getFieldName();
			CompositorType compositorType = compositor.getCompositorType();
			switch (compositorType)
			{
			case ASC:
				criteria.addOrder(Order.asc(fieldName));
				break;
			case DESC:
				criteria.addOrder(Order.desc(fieldName));
				break;
			}
		}

		return criteria;
	}

	/**
	 * 设置过滤条件到Criteria对象
	 */
	public static Criteria setFiltrationParameter(Criteria criteria, Filtration... filtrations)
	{
		if (filtrations.length > 0)
		{
			List<Criterion> criterions = new ArrayList<Criterion>();
			for (Filtration filtration : filtrations)
			{
				Criterion criterion = null;
				if (!filtration.isMultiFilter())
				{
					criterion = createCriterion(filtration.getFieldName(), filtration.getFieldValue(), filtration.getMatchType());
					criterions.add(criterion);

				} else
				{
					//包含多个属性需要比较的情况,进行or处理.
					Disjunction disjunction = Restrictions.disjunction();
					for (String filedName : filtration.getFieldNames())
					{
						criterion = createCriterion(filedName, filtration.getFieldValue(), filtration.getMatchType());
						disjunction.add(criterion);
					}
					criterions.add(disjunction);
				}
			}
			for (Criterion criterion : criterions)
			{
				criteria.add(criterion);
			}
		}

		return criteria;
	}

	/**
	 * 设置过滤条件到Criteria对象
	 */
	public static Criteria setFiltrationParameter(Criteria criteria, List<Filtration> filtrationList)
	{
		if (filtrationList != null)
		{
			//Filtration[] filtrations = (Filtration[]) filtrationList.toArray();
			Filtration[] filtrations = new Filtration[filtrationList.size()];
			for(int i =0;i<filtrationList.size();i++)
			{
				filtrations[i] = filtrationList.get(i);
			}
			return setFiltrationParameter(criteria, filtrations);
		} else
		{
			return criteria;
		}
	}

	/**
	 * 设置分页参数到Criteria对象
	 */
	public static Criteria setParameter(Criteria criteria, PageData<?> pageData)
	{
		//第一步：设置查询条件
		setFiltrationParameter(criteria, pageData.getFiltrations());
		//第二步：读取记录总数
		if (pageData.getPagination().isReadTotalCount())
		{
			long totalCount = countCriteriaResult(criteria);
			pageData.getPagination().setTotalCount(totalCount);
		}

		//第三步：设置查询范围
		criteria.setFirstResult(pageData.getPagination().getCurrentlyPageFirstResoultIndex());
		criteria.setMaxResults(pageData.getPagination().getPageSize());

		//排序条件
		setCompositorParameter(criteria, pageData.getCompositor());

		return criteria;
	}
}