mybatis打印的sql日志不写入到log文件的问题及解决

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    ​
    <!-- 配置获取spring应用名称-->
    <springProperty scope="context" name="springAppName" source="spring.application.name"/>
    <!-- 日志输出文件的命名及地址-->
    <property name="LOG_FILE" value="logs/${springAppName}-%d{yyyy-MM-dd}.log"/>​
    <!-- 控制台输出日志格式 -->
    <property name="CONSOLE_LOG_PATTERN"
              value="%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n"/>
    <!-- 控制台输出级别及格式等 -->
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>DEBUG</level>
        </filter>
        <encoder>
            <pattern>${CONSOLE_LOG_PATTERN}</pattern>
            <charset>utf8</charset>
        </encoder>
    </appender>
    <!-- 平台文件的输出配置：输出文件命名、输出级别等 -->​
    <appender name="flatfile" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>DEBUG</level>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_FILE}.gz</fileNamePattern>
            <maxHistory>3</maxHistory>
        </rollingPolicy>
        <encoder>
            <pattern>${CONSOLE_LOG_PATTERN}</pattern>
            <charset>utf8</charset>
        </encoder>
    </appender>
    <!-- 配置日志输出级别 -->
    <root level="DEBUG">
        <appender-ref ref="console"/>
        <appender-ref ref="flatfile"/>
    </root>
</configuration>

    @Override
    public String toString() {
        // Create a copy, don't share the array
	    	String result = new String(value, 0, count);
	    	if(result.contains("Preparing:")) {
	    		System.err.println(result);
	    		new Throwable().printStackTrace();
	    	}
        return result;
    }

    protected void debug(String text, boolean input) {
        if (this.statementLog.isDebugEnabled()) {
            this.statementLog.debug(this.prefix(input) + text);
        }
    }

public abstract class BaseJdbcLogger {
    protected static final Set<String> SET_METHODS = new HashSet();
    protected static final Set<String> EXECUTE_METHODS = new HashSet();
    private final Map<Object, Object> columnMap = new HashMap();
    private final List<Object> columnNames = new ArrayList();
    private final List<Object> columnValues = new ArrayList();
    protected Log statementLog;
    protected int queryStack;
    public BaseJdbcLogger(Log log, int queryStack) {
        this.statementLog = log;
        if (queryStack == 0) {
            this.queryStack = 1;
        } else {
            this.queryStack = queryStack;
        }
    }
    ……
}

package org.apache.ibatis.logging;
public interface Log {
    boolean isDebugEnabled();
    boolean isTraceEnabled();
    void error(String var1, Throwable var2);
    void error(String var1);
    void debug(String var1);
    void trace(String var1);
    void warn(String var1);
}

package org.apache.ibatis.logging.stdout;
import org.apache.ibatis.logging.Log;
public class StdOutImpl implements Log {
    public StdOutImpl(String clazz) {
    }
    public boolean isDebugEnabled() {
        return true;
    }
    public boolean isTraceEnabled() {
        return true;
    }
    public void error(String s, Throwable e) {
        System.err.println(s);
        e.printStackTrace(System.err);
    }
    public void error(String s) {
        System.err.println(s);
    }
    public void debug(String s) {
        System.out.println(s);
    }
    public void trace(String s) {
        System.out.println(s);
    }
    public void warn(String s) {
        System.out.println(s);
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="cacheEnabled" value="true" />
        <setting name="lazyLoadingEnabled" value="true" />
        <setting name="multipleResultSetsEnabled" value="true" />
        <setting name="useColumnLabel" value="true" />
        <setting name="defaultExecutorType" value="REUSE" />
        <setting name="defaultStatementTimeout" value="25000" />
        <setting name="logImpl" value="STDOUT_LOGGING" />
        <!-- 开启驼峰命名转换：Table(create_time) -> Entity(createTime)  -->
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
</configuration>

<setting name="logImpl" value="STDOUT_LOGGING" />

<setting name="logImpl" value="SLF4J" />