Question

我的sql版本是5.6.16.5和我的java代码是：

Calendar theCa = Calendar.getInstance();
theCa.setTime(new Date());
theCa.set(Calendar.HOUR_OF_DAY, 0);
theCa.set(Calendar.MINUTE, 0);
theCa.set(Calendar.SECOND, 0);
Date date = theCa.getTime();
StationActivityQuery query = new StationActivityQuery();
query.setRegisterStart(date);
List<StationActivityDO> activities = stationActivityDAO.queryActivityList(query);

我查询一些Activity对象使用条件RegisterStartDate，RegisterStartDate的类型是java.util.Date.Andadbase类型的RegisterStartDate是date而不是datetime.I发现我找不到任何结果使用这段代码：

<select id="StationActivityDAOImpl.select" parameterClass="StationActivityQuery" resultMap="StationActivityDO_ResultMap">
    select * from sta_activity where is_deleted = 0
    <dynamic prepend="and">
        <isNotNull property="registerStart" prepend="and">
            register_start=#registerStart#
        </isNotNull>
</select>

但我可以找到结果使用代码：

<select id="StationActivityDAOImpl.select" parameterClass="StationActivityQuery" resultMap="StationActivityDO_ResultMap">
    select * from sta_activity where is_deleted = 0
    <dynamic prepend="and">
        <isNotNull property="registerStart" prepend="and">
            register_start=date(#registerStart#)
        </isNotNull>
</select>

然后我用sql来查询：

SELECT * from sta_activity where register_start='2015-09-24 00:00:00'

我可以查询一些结果。然后我用sql来查询：

SELECT * from sta_activity where register_start='2015-09-24'

我也可以获得与使用register_start='2015-09-24 00:00:00'时相同的结果，所以当我没有将date()功能添加到

时，为什么我找不到任何结果

<isNotNull property="registerStart" prepend="and">register_start=date(#registerStart#)</isNotNull>

java.util.Date和mysql日期类型

0 个答案: