mybatis 查询没有返回值，SQL查询却有返回值。

mybatis 查询含Date类型参数的SQL时，没有返回值

在使用mybatis查询数据的时候，当参数类型为JAVA的Date类时，查询始终没有返回值，将SQL放到数据库中直接运行却能获取返回值。

select sif.id as id,sif.file_name as fileName,concat(sic.root_path,sif.path) as path,sif.create_date as createDate
	from sc_image_file as sif
	left join sc_image_config as sic on sic.id = sif.config_id
	where  del_flag = '0'
<if test="scId !=null and scId != ''">
    and sic.sc_id = #{scId}
</if>
<if test="devType">
   and sic.dev_type_id = #{devType}
</if>
<if test="startTime!=null and endTime!=null">
   and sif.create_date &gt;=  #{startTime}
   and sif.create_date &lt;=  #{endTime}
</if>

执行后命令如下：

==>  Preparing: select sif.id as id,sif.file_name as fileName,concat(sic.root_path,sif.path) as path,sif.create_date as createDate from sc_image_file as sif left join sc_image_config as sic on sic.id = sif.config_id where del_flag = '0' and sic.sc_id = ? and sic.dev_type_id = ? and sif.create_date >= ? and sif.create_date <= ? 
==> Parameters: 00000000002(String), 1(Integer), 2020-06-13 16:08:07.0(Timestamp), 2020-06-13 16:10:07.0(Timestamp)
<==      Total: 0

其中startTime跟endTime为JAVA Date类型。mybatis运行查询结果为0。

最后四处百度，最终定位到当mybatis按datetime条件查询，参数为时间戳时，如果时区没设置对，将获取不到正确的数据。

jdbc:mysql://localhost:3306/table_name?useTimezone=true&serverTimezone=GMT%2B8

在jdbc properties的连接地址上，增加时区为东八区。
GMT%2B8表示东八区
修改后重新测试，结果如下：

==>  Preparing: select sif.id as id,sif.file_name as fileName,concat(sic.root_path,sif.path) as path,sif.create_date as createDate from sc_image_file as sif left join sc_image_config as sic on sic.id = sif.config_id where del_flag = '0' and sic.sc_id = ? and sic.dev_type_id = ? and sif.create_date >= ? and sif.create_date <= ? 
==> Parameters: 00000000002(String), 1(Integer), 2020-06-13 16:08:07.0(Timestamp), 2020-06-13 16:10:07.0(Timestamp)
<==    Columns: id, fileName, path, createDate
<==        Row: 1, test.jpg, BJ_1/2020/0620, 2020-06-13 16:09:01
<==      Total: 1

成功获取结果。