日期:2014-05-16  浏览次数:20446 次

NamedParameterJdbcTemplate与ssh3中的HibernateDao中in语句中涉及到集合元素的区别

1.HibernateDao的用法:

public void betch_update_category(Long[] goodsIds,Long destCategoryId){
	String hql = "update com.prl.entity.Goods set category = :category where goodsId in (:goodsIdStr)";
	
	Category category = categoryManager.get(destCategoryId);
	
	Map param = new HashMap();
	param.put("category", category);
	param.put("goodsIdStr", goodsIds);
	goodsDAO.batchExecute(hql,param);		
}

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2.NamedParameterJdbcTemplate的用法:

NamedParameterJdbcTemplate namedParameterJdbcTemplate = (NamedParameterJdbcTemplate)applicationContext.getBean("namedParameterJdbcTemplate");

List<Long> subtractDb = new ArrayList<Long>();
subtractDb.add(1L);

SqlParameterSource deleteParamSource = new MapSqlParameterSource().addValue("goodsId",goodsId).addValue("giftIdCollecton",subtractDb);

namedParameterJdbcTemplate.update("delete from goods_gift where goods_id = :goodsId and gift_Id in (:giftIdCollecton)", deleteParamSource);
?

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看到区别没?HibernateDao中集合的表示形式须为数组,而NamedParameterJdbcTemplate则为列表,而且必须是这样的,如果HibernateDao中传递的参数为list,而NamedParameterJdbcTemplate传递成array,你得到的结果永远为空,切记,这个问题困扰了我很久,特记于此