Hibernate统计一个字段的多个可能值

问题：针对一张表的一个字段，想要统计其出现的不同值的次数，并封装为对象集合返回。
坑点：
1.hql语句中sum()返回一个long值，所以如果定义的对象实体类字段为int型，则会报错。
2.要想日期直接用<>比较，必须保持日期格式,例如2014/01/01
代码：

		 Query query = this
		 .getSession()
		 .createQuery(
		 "select hzmydCkpjsjJgmc,count(hzmydCkpjsjPjjg) as totalCommentCounts,"
		 +
		 "sum(case when hzmydCkpjsjPjjg='非常满意' then 1 else 0 end) as muchSatiCounts,"
		 +
		 "sum(case when hzmydCkpjsjPjjg='满意' then 1 else 0 end) as manuSatiCounts,"
		 +
		 "sum(case when hzmydCkpjsjPjjg='未评' then 1 else 0 end) as autoSatiCounts,"
		 +
		 "sum(case when hzmydCkpjsjPjjg='基本满意' then 1 else 0 end) as basicSatiCounts,"
		 +
		 "sum(case when hzmydCkpjsjPjjg='不满意' then 1 else 0 end) as notSatiCounts "
		 + " from HzmydCkpjsj "
		 + "where hzmydCkpjsjJlrq>=:startTime and hzmydCkpjsjJlrq<=:endTime "
		 + "group by hzmydCkpjsjJgmc")
		 .setParameter("startTime", startTime)
		 .setParameter("endTime", endTime);
		 List<Object[]> list = query.list();
		 List<GroupHzmydCkpjsjByKs> resultList = new
		 ArrayList<GroupHzmydCkpjsjByKs>();
		 for (Object[] obj : list) {
		 GroupHzmydCkpjsjByKs gByKs = new GroupHzmydCkpjsjByKs();
		 gByKs.setTotalCommentCounts((Long) obj[1]);
		 gByKs.setMuchSatiCounts((Long) obj[2]);
		 gByKs.setManuSatiCounts((Long) obj[3]);
		 gByKs.setAutoSatiCounts((Long) obj[4]);
		 gByKs.setBasicSatiCounts((Long) obj[5]);
		 gByKs.setNotSatiCounts((Long) obj[6]);
		 gByKs.setHzmydCkpjsjJgmc(obj[0].toString());
		 resultList.add(gByKs);
		 }
return resultList;

当然，还有个简单的：

	Query query = this
				.getSession()
				.createQuery(
						"select new com.fxfk.entity.GroupHzmydCkpjsjByKs(hzmydCkpjsjJgmc,count(hzmydCkpjsjPjjg) as totalCommentCounts,"
								+ "sum(case when hzmydCkpjsjPjjg='非常满意' then 1 else 0 end) as muchSatiCounts,"
								+ "sum(case when hzmydCkpjsjPjjg='满意' then 1 else 0 end) as manuSatiCounts,"
								+ "sum(case when hzmydCkpjsjPjjg='未评' then 1 else 0 end) as autoSatiCounts,"
								+ "sum(case when hzmydCkpjsjPjjg='基本满意' then 1 else 0 end) as basicSatiCounts,"
								+ "sum(case when hzmydCkpjsjPjjg='不满意' then 1 else 0 end) as notSatiCounts) "
								+ " from HzmydCkpjsj "
								+ "where hzmydCkpjsjJlrq>=:startTime and hzmydCkpjsjJlrq<=:endTime "
								+ "group by hzmydCkpjsjJgmc")
				.setParameter("startTime", startTime)
				.setParameter("endTime", endTime);
		List<GroupHzmydCkpjsjByKs> resultList = query.list();
		return resultList;