Java logback 日志文件

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">

    <property name="log" value="/log"></property>

    <!--控制台-->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class= "ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>[%thread] %-5level %logger{50} - %msg%n</pattern>
        </encoder>
    </appender>
    
    <!--文件输出设置-->
    <appender name="file" class="ch.qos.logback.core.FileAppender">

        <!--日志文件保存路径-->
        <file>${log}/logback.log</file>
        <!--日志信息格式配置-->
        <encoder class= "ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>[%thread] %-5level %logger{50} - %msg%n</pattern>
        </encoder>
    </appender>

    <logger name="com.apache.ibatis" level="DEBUG"/>
    <logger name="java.sql.Connerction" level="DEBUG"/>
    <logger name="java.sql.Statement" level="DEBUG"/>
    <logger name="java.sql.PreparedStatement" level="DEBUG"/>

    <root level="DUBUG">
        <appender-ref ref="STDOUT"/>
        <appender-ref ref="file"/>
    </root>
</configuration>

img

为啥日志文件没有生成啊