Slf4j 使用教程

1.导入

在类上使用这个注解就可以
@Slf4j

 

2.配置

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

    <!-- 格式化输出：%date表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度 %msg：日志消息，%n是换行符-->
    <property name="LOG_PATTERN" value="%date{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n" />
    <!-- 定义日志存储的路径，不要配置相对路径 -->
    <property name="FILE_INFO_PATH" value="D:/study/java/springboot/sell/tmp/logs/${LOG_NAME}/info/logback.info.%d{yyyy-MM-dd}.%i.log" />
    <property name="FILE_ERROR_PATH" value="D:/study/java/springboot/sell/tmp/logs/${LOG_NAME}/error/logback.info.%d{yyyy-MM-dd}.%i.log" />

    <!-- 控制台输出日志 -->
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <!-- 按照上面配置的LOG_PATTERN来打印日志 -->
            <pattern>${LOG_PATTERN}</pattern>
        </encoder>
    </appender>

    <!--每天生成一个日志文件，保存15天的日志文件。rollingFile是用来切分文件的 -->
    <appender name="fileInfo" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>INFO</level>
        </filter>
        <encoder>
            <pattern>${LOG_PATTERN}</pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${FILE_INFO_PATH}</fileNamePattern>
            <!-- keep 15 days' worth of history -->
            <maxHistory>15</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <!-- 日志文件的最大大小 -->
                <maxFileSize>10MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
    </appender>

    <appender name="fileError" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>error</level>
        </filter>
        <encoder>
            <pattern>${LOG_ERROR_PATTERN}</pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${FILE_ERROR_PATH}</fileNamePattern>
            <!-- keep 15 days' worth of history -->
            <maxHistory>15</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <!-- 日志文件的最大大小 -->
                <maxFileSize>10MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
    </appender>
    <!-- project default level -->
    <logger name="src" level="INFO" />

    <!-- 日志输出级别 常用的日志级别按照从高到低依次为：ERROR、WARN、INFO、DEBUG。 -->
    <root level="INFO">
        <appender-ref ref="CONSOLE" />
        <appender-ref ref="fileInfo" />
        <appender-ref ref="fileError" />
    </root>
</configuration>