SpringBoot 配置log4j2日志输出

分手后的思念是犯贱 2022-06-12 01:22 299阅读 0赞

可以有两种优雅一点的方式：

<table> 
 <thead> 
  <tr> 
   <th>格式</th> 
   <th>依赖包</th> 
   <th>文件名</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>YAML</td> 
   <td>com.fasterxml.jackson.core:jackson-databind com.fasterxml.jackson.dataformat:jackson-dataformat-yaml</td> 
   <td>log4j2.yaml log4j2.yml</td> 
  </tr> 
  <tr> 
   <td>JSON</td> 
   <td>com.fasterxml.jackson.core:jackson-databind</td> 
   <td>log4j2.json log4j2.jsn</td> 
  </tr> 
 </tbody> 
</table>

# pom.xml #

排除 web 包中的 `logging`,

引入`log4j2`依赖和`yaml` 文件识别。

<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>
    </dependency>
    
    <dependency>
        <groupId>com.fasterxml.jackson.dataformat</groupId>
        <artifactId>jackson-dataformat-yaml</artifactId>
    </dependency>

# log4j2.yaml #

在 `resources` 文件夹下增加 `log4j2.yaml` 文件。

Configuration:
      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.xjj=trace
          # 生产：-Dlog.level.console=warn -Dlog.level.xjj=info
          - name: log.level.console
            value: trace
          - name: log.level.com.jeiker.demo.mapper
            value: trace
          - name: log.path
            value: /opt/logs
          - name: project.name
            value: my-app
    
      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}:%5p %20t [%50F:%3L] - %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}:%5p %20t [%50F:%3L] - %m%n"
            Policies:
              SizeBasedTriggeringPolicy:
                size: "128 MB"
            DefaultRolloverStrategy:
              max: 1000
    
      Loggers:
        Root:
          level: info
          AppenderRef:
            - ref: CONSOLE
            - ref: ROLLING_FILE
        Logger: # 为 com.jeiker.demo.mapper 包配置特殊的Log级别，方便调试 SQL 语句输出
          - name: log.level.com.jeiker.demo.mapper
            additivity: false
            level: ${sys:log.level.com.jeiker.demo.mapper}
            AppenderRef:
              - ref: CONSOLE
              - ref: ROLLING_FILE