现象
springboot+logback本地调试有sql日志，但是生产环境日志文件中没有sql日志
解决
①注释掉#mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
注释掉就可以在生产打印sql日志，如果不注释，只能在控制台打印sql
②主要是logback配置文件中
<logger name="com.keji.xiangmu" level="DEBUG"/>
name原来是带*号的，但是发现识别不了，打印不了日志，所以就具体到每一个dao的路径，或者写一个总路径，
完整的logback-spring.xml日志文件如下：
```
<configuration>
<property name="LOG_HOME" value="logs" />
<appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
<layout class="ch.qos.logback.classic.PatternLayout">
<pattern>
%d - %msg%n
</pattern>
</layout>
</appender>
<appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>ERROR</level>
<onMatch>DENY</onMatch>
<onMismatch>ACCEPT</onMismatch>
</filter>
<encoder>
<pattern>
%d - %msg%n
</pattern>
</encoder>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_HOME}/info.%d{yyyy-MM-dd}.log</fileNamePattern>
<maxHistory>30</maxHistory>
<totalSizeCap>1GB</totalSizeCap>
</rollingPolicy>
</appender>
<appender name="fileErrorLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>ERROR</level>
</filter>
<encoder>
<pattern>
%d - %msg%n
</pattern>
</encoder>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_HOME}/error.%d{yyyy-MM-dd}.log</fileNamePattern>
<maxHistory>30</maxHistory>
<totalSizeCap>1GB</totalSizeCap>
</rollingPolicy>
</appender>
<logger name="com.keji.xiangmu" level="DEBUG"/>
<root level="info">
<appender-ref ref="consoleLog"/>
<appender-ref ref="fileInfoLog"/>
<appender-ref ref="fileErrorLog"/>
</root>
</configuration>
```
