Drafting log4j2

log4j2####

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration>
<Configuration status="off">
  <!--Appender settings used for logging-->
  <Appenders>
    <Console name="STDOUT" target="SYSTEM_OUT">
      <PatternLayout>
        <pattern>[%d{yyyy-MM-dd HH:mm:ss.SSS}], %-5p, %t, %c, %m%n</pattern>
      </PatternLayout>
    </Console>
    <RollingFile name="FILE" fileName="./log/appLog.log" filePattern="appLog-%d{yyyy-MM-dd}-%i.log">
      <TimeBasedTriggeringPolicy />
<!--      <SizeBasedTriggeringPolicy size="100MB" /> -->
      <DefaultRolloverStrategy max="3"/>
    </RollingFile>
  </Appenders>

  <!--Setting the logger to use for output-->
  <Loggers>
    <Root level="DEBUG">
      <AppenderRef ref="STDOUT" level="INFO"/>
<!--      <AppenderRef ref="FILE" /> -->
    </Root>
  </Loggers>
</Configuration>

Log level

DEBUG　＜　INFO　＜　WARN　＜　ERROR　＜　FATAL

Any JAVA.java

logger.info("The entered parameter is "{}"is.", name);
//Below logger test
logger.debug("logger.debug");
logger.info("logger.info");
logger.warn("logger.warn");
logger.error("logger.error");
logger.fatal("logger.fatal");

result

For INFO
[2018-11-10 13:16:40.479], INFO , http-nio-8080-exec-2, sample.HelloWorldAction,The parameter entered is "test".
[2018-11-10 13:16:40.481], INFO , http-nio-8080-exec-2, sample.HelloWorldAction, logger.info
[2018-11-10 13:16:40.481], WARN , http-nio-8080-exec-2, sample.HelloWorldAction, logger.warn
[2018-11-10 13:16:40.481], ERROR, http-nio-8080-exec-2, sample.HelloWorldAction, logger.error
[2018-11-10 13:16:40.481], FATAL, http-nio-8080-exec-2, sample.HelloWorldAction, logger.fatal
In case of ERROR
[2018-11-10 13:19:16.131], ERROR, http-nio-8080-exec-9, sample.HelloWorldAction, logger.error
[2018-11-10 13:19:16.147], FATAL, http-nio-8080-exec-9, sample.HelloWorldAction, logger.fatal