log4j2的使用

1. 引入pom文件

<!-- 配置 log4j2 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>
        <!-- 加上这个才能辨认到log4j2.yml文件 -->
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-yaml</artifactId>
        </dependency>

提示：如果用了springboot的web的小伙伴，记得去掉logging，不然会包冲突哦。

方法1:在web的依赖下添加

                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>

方法2:右键pom文件，选Diagrams，然后通过结构图找到logging，然后右键删除就可以了。

2.配置log4j.yml

# 共有8个级别，按照从低到高为：ALL < TRACE < DEBUG < INFO < WARN < ERROR < FATAL < OFF。
Configuration:
  status: debug
  monitorInterval: 30
  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.xjj=trace
      #生产：-Dlog.level.console=warn -Dlog.level.xjj=info
      - name: log.level.console
        value: info
      - name: log.path
        value: log
      - name: project.name
        value: opendoc
      - name: log.pattern
        value: "%d{yyyy-MM-dd HH:mm:ss.SSS} -%5p ${PID:-} [%15.15t] %-30.30C{1.} : %m%n"
  Appenders:
    Console:  #输出到控制台
      name: CONSOLE
      target: SYSTEM_OUT
      PatternLayout:
        pattern: ${log.pattern}
    #   启动日志
    RollingFile:
      - name: ROLLING_FILE
        fileName: ${log.path}/${project.name}.log
        filePattern: "${log.path}/historyRunLog/$${date:yyyy-MM}/${project.name}-%d{yyyy-MM-dd}-%i.log.gz"
        PatternLayout:
          pattern: ${log.pattern}
        Filters:
          #        一定要先去除不接受的日志级别，然后获取需要接受的日志级别
          ThresholdFilter:
            - level: error
              onMatch: DENY
              onMismatch: NEUTRAL
            - level: info
              onMatch: ACCEPT
              onMismatch: DENY
        Policies:
          TimeBasedTriggeringPolicy:  # 按天分类
            modulate: true
            interval: 1
        DefaultRolloverStrategy:     # 文件最多100个
          max: 100
      #   平台日志
      - name: PLATFORM_ROLLING_FILE
        ignoreExceptions: false
        fileName: ${log.path}/platform/${project.name}_platform.log
        filePattern: "${log.path}/platform/$${date:yyyy-MM}/${project.name}-%d{yyyy-MM-dd}-%i.log.gz"
        PatternLayout:
          pattern: ${log.pattern}
        Policies:
          TimeBasedTriggeringPolicy:  # 按天分类
            modulate: true
            interval: 1
        DefaultRolloverStrategy:     # 文件最多100个
          max: 100
      #   业务日志
      - name: BUSSINESS_ROLLING_FILE
        ignoreExceptions: false
        fileName: ${log.path}/bussiness/${project.name}_bussiness.log
        filePattern: "${log.path}/bussiness/$${date:yyyy-MM}/${project.name}-%d{yyyy-MM-dd}-%i.log.gz"
        PatternLayout:
          pattern: ${log.pattern}
        Policies:
          TimeBasedTriggeringPolicy:  # 按天分类
            modulate: true
            interval: 1
        DefaultRolloverStrategy:     # 文件最多100个
          max: 100
      #   错误日志
      - name: EXCEPTION_ROLLING_FILE
        ignoreExceptions: false
        fileName: ${log.path}/exception/${project.name}_exception.log
        filePattern: "${log.path}/exception/$${date:yyyy-MM}/${project.name}-%d{yyyy-MM-dd}-%i.log.gz"
        ThresholdFilter:
          level: error
          onMatch: ACCEPT
          onMismatch: DENY
        PatternLayout:
          pattern: ${log.pattern}
        Policies:
          TimeBasedTriggeringPolicy:  # 按天分类
            modulate: true
            interval: 1
        DefaultRolloverStrategy:     # 文件最多100个
          max: 100
      #   DB 日志
      - name: DB_ROLLING_FILE
        ignoreExceptions: false
        fileName: ${log.path}/db/${project.name}_db.log
        filePattern: "${log.path}/db/$${date:yyyy-MM}/${project.name}-%d{yyyy-MM-dd}-%i.log.gz"
        PatternLayout:
          pattern: ${log.pattern}
        Policies:
          TimeBasedTriggeringPolicy:  # 按天分类
            modulate: true
            interval: 1
        DefaultRolloverStrategy:     # 文件最多100个
          max: 100
  Loggers:
    Root:
      level: info
      AppenderRef:
        - ref: CONSOLE
        - ref: ROLLING_FILE
        - ref: EXCEPTION_ROLLING_FILE
    Logger:
      - name: platform
        level: info
        additivity: false
        AppenderRef:
          - ref: CONSOLE
          - ref: PLATFORM_ROLLING_FILE
      - name: bussiness
        level: info
        additivity: false
        AppenderRef:
          - ref: BUSSINESS_ROLLING_FILE
      - name: exception
        level: debug
        additivity: true
        AppenderRef:
          - ref: EXCEPTION_ROLLING_FILE
      - name: db
        level: info
        additivity: false
        AppenderRef:
          - ref: DB_ROLLING_FILE
#    监听具体包下面的日志
#    Logger: # 为com.xjj包配置特殊的Log级别，方便调试
#      - name: com.xjj
#        additivity: false
#        level: ${sys:log.level.xjj}
#        AppenderRef:
#          - ref: CONSOLE
#          - ref: ROLLING_FILE

3.在application.yml下引入log4j.yml配置

logging:
  config: classpath:log4j.yml

4.大功告成，自己浪吧。