spring boot 集成Log4j2

1. 引入依赖

 <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
      <exclusions>
        <!--去除spring boot默认使用的logging-->
        <exclusion>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>


  <!--Log4j2依赖包 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-log4j2</artifactId>
    </dependency>

    <!-- Log4j2 异步支持 -->
    <dependency>
      <groupId>com.lmax</groupId>
      <artifactId>disruptor</artifactId>
      <version>3.3.6</version>
    </dependency>

    <!--  lombok 支持log注解 ，简化代码-->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.16.14</version>
    </dependency>

<!-- 使用log4j2.yml格式的配置文件，必须加这个依赖，用于识别.yml -->
    <dependency>  
      <groupId>com.fasterxml.jackson.dataformat</groupId>
      <artifactId>jackson-dataformat-yaml</artifactId>
    </dependency>

2. 在resources目录下创建

Configuration:
#  status，这个用于设置log4j2自身内部的信息输出，可以不设置，当设置# 成trace时 你会看到log4j2内部各种详细输出。可以设置成OFF(关闭) 或 # Error(只输出错误信息)。
  status: warn

  Properties: # 定义全局变量
    Property: # 缺省配置（用于开发环境）。其他环境需要在VM参数中指定，如下：
      #测试：-Dlog.level.console=warn -Dlog.level.xxx=trace
      #生产：-Dlog.level.console=warn -Dlog.level.xxx=info
      - name: log.level.console
        value: error
      - name: log.level.xxx
        value: trace
      - name: log.path
        value: logs
      - name: project.name
        value: log

  Appenders:
    Console:  #输出到控制台
      name: CONSOLE
      target: SYSTEM_OUT
      ThresholdFilter:
        level: ${sys:log.level.console} # “sys:”表示：如果VM参数中没指定这个变量值，则使用本文件中定义的缺省全局变量值
        onMatch: ACCEPT
        onMismatch: DENY
      PatternLayout:
        pattern: "%d{yyyy-MM-dd HH:mm:ss,SSS}:%4p %t (%F:%L) - %m%n"
    RollingFile: # 输出到文件，超过128MB归档
      - name: ROLLING_FILE
        ignoreExceptions: false
        fileName: ${log.path}/${project.name}.log
        filePattern: "${log.path}/$${date:yyyy-MM}/${project.name}-%d{yyyy-MM-dd}-%i.log.gz"
        PatternLayout:
          pattern: "%d{yyyy-MM-dd HH:mm:ss,SSS}:%4p %t (%F:%L) - %m%n"
        Policies:
          SizeBasedTriggeringPolicy:
            size: "128 MB"
        DefaultRolloverStrategy:
          max: 1000

  Loggers:
    Root:
      level: info
      AppenderRef:
        - ref: CONSOLE
        - ref: ROLLING_FILE
#    Logger: # 为com.xxx包配置特殊的Log级别，方便调试
#      - name: com.xxx
#        additivity: false
#        level: ${sys:log.level.xjj}
#        AppenderRef:
#          - ref: CONSOLE
#          - ref: ROLLING_FILE

3. 测试

  public void logging() {
        Date date = new Date();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        log.info(simpleDateFormat.format(date));
        log.debug("this is debug");
        log.error(date.getTime());
    }