~~~~~~~~~~~~~~~~~~~~log4j2.xml文件内容

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="OFF" monitorInterval="30">
<properties>
<!--设置日志在硬盘上输出的目录-->
<property name="logPath">logs</property>
</properties>

<Appenders>
<!--设置在控制台打印日志-->
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="[%-5p]:%d{YYYY-MM-dd HH:mm:ss} [%t] %c{1}:%L - %msg%n" />
</Console>

<!--设置级别为INFO日志输出到info.log中-->
<RollingFile name="INFO" filename="${logPath}/info.log"
filepattern="${logPath}/%d{YYYYMMdd}-%i-info.log.zip">
<Filters>
<!--设置只输出级别为INFO的日志-->
<ThresholdFilter level="INFO"/>
<ThresholdFilter level="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>
</Filters>
<PatternLayout pattern="[ %-5p]:%d{YYYY-MM-dd HH:mm:ss} [%t] %c{1}:%L - %msg%n" />
<Policies>
<!--设置每天打包日志一次-->
<TimeBasedTriggeringPolicy interval="1" modulate="true"/>
<!--设置日志文件满1MB后打包-->
<SizeBasedTriggeringPolicy size="1 MB" />
</Policies>
<DefaultRolloverStrategy max="20" />
</RollingFile>

<!--设置级别为WARN日志输出到warn.log中-->
<RollingFile name="WARN" filename="${logPath}/warn.log"
filepattern="${logPath}/%d{YYYYMMdd}-%i-warn.log.zip">
<Filters>
<!--设置只输出级别为WARN的日志-->
<ThresholdFilter level="WARN"/>
<ThresholdFilter level="ERROR" onMatch="DENY" onMismatch="NEUTRAL"/>
</Filters>
<PatternLayout pattern="[ %-5p]:%d{YYYY-MM-dd HH:mm:ss} [%t] %c{1}:%L - %msg%n" />
<Policies>
<!--设置每天打包日志一次-->
<TimeBasedTriggeringPolicy interval="1" modulate="true"/>
<!--设置日志文件满1MB后打包-->
<SizeBasedTriggeringPolicy size="1 MB" />
</Policies>
<DefaultRolloverStrategy max="20" />
</RollingFile>

<!--设置级别为ERROR日志输出到error.log中-->
<RollingFile name="ERROR" filename="${logPath}/error.log"
filepattern="${logPath}/%d{YYYYMMdd}-%i-error.log.zip">
<!--设置只输出级别为ERROR的日志-->
<ThresholdFilter level="ERROR"/>
<PatternLayout pattern="[ %-5p]:%d{YYYY-MM-dd HH:mm:ss} [%t] %c{1}:%L - %msg%n" />
<Policies>
<!--设置每天打包日志一次-->
<TimeBasedTriggeringPolicy interval="1" modulate="true"/>
<!--设置日志文件满1MB后打包-->
<SizeBasedTriggeringPolicy size="1 MB" />
</Policies>
<DefaultRolloverStrategy max="20" />
</RollingFile>

<!--设置通过邮件发送日志信息-->
<SMTP name="Mail" subject="XXXXSaaS系统正式版异常信息" to="yong.shi@lengjing.info" from="message@lengjing.info"
smtpUsername="message@lengjing.info" smtpPassword="LENG****1234" smtpHost="mail.lengjing.info" smtpDebug="false"
smtpPort="25" bufferSize="10">
<PatternLayout pattern="[%-5p]:%d{YYYY-MM-dd HH:mm:ss} [%t] %c{1}:%L - %msg%n" />
</SMTP>
</Appenders>

<Loggers>
<logger name="com.example.demo" level="INFO" additivity="true">  //Logger节点用来单独指定日志的形式，比如要为指定包下的class指定不同的日志级别等。
<appender-ref ref="INFO" />
<appender-ref ref="WARN" />
<appender-ref ref="ERROR" />
<appender-ref ref="Mail" />
</logger>
<root level="DEBUG">    //Root节点用来指定项目的根日志，如果没有单独指定Logger，那么就会默认使用该Root日志输出
<appender-ref ref="Console"/> 
</root>
</Loggers>
</Configuration>

~~~~~~~~~~~~~~~~~~~~~~POM.xml设置

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
<version>1.3.8.RELEASE</version>
</dependency>

~~~~~~~~~~~~~~~~~~Application.properties

logging.config=classpath:log4j2.xml

~~~~~~~~~~~~~~~~~~~~~~~~

log4j2.xml建在resources目录下