mybatis logback打印sql

<?xml version="1.0" encoding="UTF-8" ?>
<configuration>
  <contextName>acfun-service.spread-provider</contextName>
  <!-- 声明变量 -->
 <substitutionProperty name="log.base" value="./logs/acfun-service.vote-provider"/>

  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <layout class="ch.qos.logback.classic.PatternLayout">
      <pattern>%d{yy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%n</pattern>
    </layout>
  </appender>

  <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <fileNamePattern>${log.base}.%d{yyyy-MM-dd}.log</fileNamePattern>
      <maxHistory>30</maxHistory>
    </rollingPolicy>
    <encoder>
      <pattern>%d{yy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%n</pattern>
      <charset>utf-8</charset>
    </encoder>
  </appender>
  <!--打印sql开启-->
 <logger name="com.xxx.service.vote.dao" level="debug" additivity="true">
    <appender-ref ref="console" />
  </logger>
  <!--打印sql结束-->

 <root level="DEBUG">
    <appender-ref ref="STDOUT"/>
    <appender-ref ref="FILE"/>
  </root>

</configuration>