log4j2优点：http://logging.apache.org/log4j/2.x/
最喜欢的一点：日志不同级别可以用颜色区分，定位问题非常快捷。

pom文件的依赖配置中，去掉spring boot默认的log配置，引入log4j2依赖包：

  <dependency> <!-- exclude掉spring-boot的默认log配置 -->  
        <groupId>org.springframework.boot</groupId>  
        <artifactId>spring-boot-starter</artifactId>  
        <exclusions>  
            <exclusion>  
                <groupId>org.springframework.boot</groupId>  
                <artifactId>spring-boot-starter-logging</artifactId>  
            </exclusion>  
        </exclusions>  
    </dependency>  
    <dependency> <!-- 引入log4j2依赖 -->  
        <groupId>org.springframework.boot</groupId>  
        <artifactId>spring-boot-starter-log4j2</artifactId>  
    </dependency>  
    <dependency>  <!-- 加上这个才能辨认到log4j2.yml文件 -->  
        <groupId>com.fasterxml.jackson.dataformat</groupId>  
        <artifactId>jackson-dataformat-yaml</artifactId>  
    </dependency> 

log4j2.yaml配置

Configuration:
  status: debug
  Appenders:
    Console:#输出到控制台
      name: Console
      PatternLayout:
        Pattern: '%highlight{%d{HH:mm:ss.SSS} [%t] %-5level %logger{1.}:%L - %msg%n}{%throwable{short.fileName}}{FATAL=white,ERROR=red,
          WARN=blue, INFO=black, DEBUG=green, TRACE=blue}'
      target: SYSTEM_OUT
    RollingFile:# 输出到文件，超过2048MB归档 
    - name: RollingFile_Appender
      fileName: /logs/events-csg-adapter/app.log
      filePattern: "/logs/events-csg-adapter/event-csg-adapter-%i.log.%d{yyyy-MM-dd}"
      PatternLayout:#设置日志级别的颜色
        pattern: '%highlight{%d{HH:mm:ss.SSS} [%t] %-5level %logger{1.}:%L - %msg%n}{%throwable{short.fileName}}{FATAL=white,ERROR=red,
                           WARN=blue, INFO=black, DEBUG=green, TRACE=blue}'
      Policies:
        SizeBasedTriggeringPolicy:
          size: 2048 M
        DefaultRollOverStrategy:
          max: 10
  Loggers:
    Root:
      AppenderRef:
      - ref: Console
      - ref: RollingFile_Appender
    logger:
    - name: org.springframework
      level: debug
    - name: com.apricotforest.events
      level: debug

输出日志：

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