在resource文件夹下建logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <!--1，定义日志保存的路径-->
    <property name="LOG_HOME" value="E:\\xxx\\xxx_log\\xxx_log" />

    <!--2，定义一个控制台输出器，名为console-->
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <!--按pattern指定的格式输出日志，编码为UTF-8-->
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss} %-5level [%thread]  %logger{30} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>

    <!--3，定义一个日滚动的日志文件-->
    <appender name="info" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <!--按pattern指定的格式输出日志，编码为UTF-8-->
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss} %-5level [%thread]  %logger{30} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
        <!-- 定义保存的文件名 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME}/info_%d{yyyy-MM-dd}.log</fileNamePattern>
            <!--日志最多保存30天-->
            <maxHistory>30</maxHistory>
        </rollingPolicy>
    </appender>

    <appender name="warn" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>WARN</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <!--按pattern指定的格式输出日志，编码为UTF-8-->
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss} %-5level [%thread]  %logger{30} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
        <!-- 定义保存的文件名 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME}/warn_%d{yyyy-MM-dd}.log</fileNamePattern>
            <!--日志最多保存30天-->
            <maxHistory>30</maxHistory>
        </rollingPolicy>
    </appender>

    <appender name="error" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <!--按pattern指定的格式输出日志，编码为UTF-8-->
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss} %-5level [%thread]  %logger{30} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
        <!-- 定义保存的文件名 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME}/error_%d{yyyy-MM-dd}.log</fileNamePattern>
            <!--日志最多保存30天-->
            <maxHistory>30</maxHistory>
        </rollingPolicy>
    </appender>

    <!-- 定义日志全局最低输出级别是INFO，同时向控制台和日滚动文件输出 -->
    <root level="INFO">
        <appender-ref ref="console" />
        <appender-ref ref="info" />
        <appender-ref ref="error" />
        <appender-ref ref="warn" />
    </root>
</configuration>