spring boot 和mybatis整合打印sql语句

spring boot默认的日志是logback.

logback.xml如下：

<?xml version="1.0" encoding="UTF-8"?>

<configuration scan="true" scanPeriod="30 seconds">

	<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
		<encoder>
			<pattern>%-4relative [%thread] %-5level %logger{35} - %msg %n</pattern>
		</encoder>
	</appender>
	
	<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
		<!-- encoder 默认配置为PatternLayoutEncoder -->
		<encoder>
			<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
			</pattern>
		</encoder>
	</appender>

	<appender name="logFile"
		class="ch.qos.logback.core.rolling.RollingFileAppender">
		<file>