2010-01-12 73 views
0

我有一個針對MySql數據庫運行的Spring應用程序。我有一個銷售表所示:春季queryForLong - 精度損失

+-------------------+------------------------------+------+-----+---------+-------+ 
| Field    | Type       | Null | Key | Default | Extra | 
+-------------------+------------------------------+------+-----+---------+-------+ 
| Price    | decimal(19,4)    | NO |  | NULL |  | 
| ItemId   | int(10) unsigned    | NO |  | NULL |  | 
+-------------------+------------------------------+------+-----+---------+-------+ 

在我的Spring類,我有以下幾點:

long price = getSimpleJdbcTemplate().queryForLong("SELECT price FROM sales WHERE itemID = :itemID", params); 
logger.info("price: " + price + "); 

然而,這回爲1的價格,即使該查詢直接對數據庫返回0.8500。我該如何避免從數據庫中的小數點到精確的丟失精度?

回答

5

long不支持小數位,因爲它是整數類型。你有沒有試過queryForObject(sql, BigDecimal.class, params)