JDBC Template 查询SQL中包含sum(), count()等函数时结果集的接收

最近在做的项目使用了JDBC Template来操作数据库，自定义了很多DTO类来接受query的结果。突然项目需求多了一个需要求和的结果：

@Override
<span>	</span>public List<VipAwardDTO> getAward(int vipLv) {
<span>		</span>String sql = "SELECT " + Vips.COLUMN_GIFT_TYPE + ", SUM("
<span>				</span>+ Vips.COLUMN_GIFT_CNT + ") FROM " + Vips.TABLE_NAME
<span>				</span>+ " WHERE " + Vips.COLUMN_VIP_LV + " <=?" + " GROUP BY "
<span>				</span>+ Vips.COLUMN_GIFT_TYPE;

<span>		</span>return this.globalMasterJdbcTemplate.query(sql,
<span>				</span>new BeanPropertyRowMapper<VipAwardDTO>(VipAwardDTO.class),
<span>				</span>vipLv);
<span>	</span>}

结果集中怎么都没有sum()的结果。后来查了一下技术文章恍然大悟：

@Override
public List<VipAwardDTO> getAward(int vipLv) {
String sql = "SELECT " + Vips.COLUMN_GIFT_TYPE + ", SUM("
+ Vips.COLUMN_GIFT_CNT + ") <span style="color: rgb(255, 0, 0);">AS " + Vips.COLUMN_GIFT_CNT</span>
+ " FROM " + Vips.TABLE_NAME + " WHERE " + Vips.COLUMN_VIP_LV
+ " <=?" + " GROUP BY " + Vips.COLUMN_GIFT_TYPE;

return this.globalMasterJdbcTemplate.query(sql,
new BeanPropertyRowMapper<VipAwardDTO>(VipAwardDTO.class),
vipLv);
}

给sum()的结果加个别名就OK了，但是一定要和你的DTO类中定义的field名字一致才可以正确的接受到query的结果！