Installation

<dependencies>

  <dependency>
    <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>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j2</artifactId>
    <scope>runtime</scope>
  </dependency>

</dependencies>

configurations {
  all.exclude group: 'org.springframework.boot', module: 'spring-boot-starter-logging'
}

dependencies {
  runtimeOnly group: 'org.springframework.boot', module: 'spring-boot-starter-log4j2'
}

<?xml version="1.0" encoding="UTF-8"?>
<Configuration xmlns="https://logging.apache.org/xml/ns"
               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xsi:schemaLocation="https://logging.apache.org/xml/ns
                                   https://logging.apache.org/xml/ns/log4j-config-2.xsd">
  <Appenders>
    <Console name="CONSOLE">
      <PatternLayout pattern="%d [%t] %5p %c{1.} - %m%n"/>(1)
    </Console>
  </Appenders>
  <Loggers>
    <Root level="INFO">
      <AppenderRef ref="CONSOLE"/>
    </Root>
  </Loggers>
</Configuration>

{
  "Configuration": {
    "Appenders": {
      "Console": {
        "name": "CONSOLE",
        "PatternLayout": {
          "pattern": "%d [%t] %5p %c{1.} - %m%n" (1)
        }
      }
    },
    "Loggers": {
      "Root": {
        "level": "INFO",
        "AppenderRef": {
          "ref": "CONSOLE"
        }
      }
    }
  }
}

Configuration:
  Appenders:
    Console:
      name: CONSOLE
      PatternLayout:
        pattern: "%d [%t] %5p %c{1.} - %m%n" (1)
  Loggers:
    Root:
      level: INFO
      AppenderRef:
        ref: CONSOLE

appender.0.type = Console
appender.0.name = CONSOLE
appender.0.layout = PatternLayout (1)
appender.0.layout.pattern = %d [%t] %5p %c{1.} - %m%n
rootLogger.level = INFO
rootLogger.appenderRef.0.ref = CONSOLE

module foo.bar {
    requires java.xml;
}