<dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.12</version>
</dependency>
<dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>1.7.12</version>
</dependency>
<dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-core</artifactId> <version>1.1.3</version>
</dependency>
<dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>1.1.3</version>
</dependency>

<?xml version="1.0" encoding="UTF-8" ?>
<configuration><jmxConfigurator /><!-- 控制台输出日志 --><appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"><layout class="ch.qos.logback.classic.PatternLayout"><pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} -%msg%n</pattern></layout></appender><!-- 文件输出日志 (文件大小策略进行文件输出，超过指定大小对文件备份) --><appender name="FILE"class="ch.qos.logback.core.rolling.RollingFileAppender"><File>xxxx.log</File><rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy"><FileNamePattern>xxxx.log.%i.bak</FileNamePattern><MinIndex>1</MinIndex><MaxIndex>12</MaxIndex></rollingPolicy><triggeringPolicyclass="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy"><MaxFileSize>100MB</MaxFileSize></triggeringPolicy><layout class="ch.qos.logback.classic.PatternLayout"><Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} -%msg%n</Pattern></layout></appender><!--这里指定logger name 是为jmx设置日志级别做铺垫 --><logger name="com.xxx.xxx"><level value="INFO" /><appender-ref ref="STDOUT" /><appender-ref ref="FILE" /></logger>
</configuration>

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class Bar { Logger logger = LoggerFactory.getLogger(Bar.class); public void doIt() {logger.debug("doing my job");}
}