1.在SpringBoot中打印mybatis中执行的sql
其实在application.properties 文件下，添加一下配置即可：
logging.level.org.springframework=WARN logging.level.org.spring.springboot.dao=DEBUG logging.file=logs/spring-boot-logging.log
注意：其中logging.level.com.你的Mapper包=日志等级
logging.level.com.shitou.huishi.domain.dataaccess=debug
2.在mybatis中返回count这个方法的结果
<select id="selectListByType" parameterType="com.shitou.huishi.domain.entity.BusinessMarketAffiliate" resultType="java.lang.Integer"> select count(1) as num from tb_business_market_affiliate where busi_id=#{busiId,jdbcType=INTEGER} and data_key=#{dataKey,jdbcType=INTEGER} and data_type=#{dataType,jdbcType=VARCHAR} </select>
将resultMap="java.lang.Integer" 改成 resultType="java.lang.Integer"