log4j2配合ELK第一步，将日志JSON化

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<!-- <Property name="PATTERN">{"logger": "%logger", "level": "%level", "msg": "%message"}%n</Property> -->
    <Properties>
        <Property name="PID">????</Property>
        <Property name="LOG_LEVEL_PATTERN">%-5p</Property>
        <Property name="LOG_DATEFORMAT_PATTERN">yyyy-MM-dd HH:mm:ss.SSS</Property>
        <Property name="CONSOLE_LOG_PATTERN"> <Property name="CONSOLE_LOG_PATTERN">{"className":"%C","method":"%M","line":"%L","gmt_create":"%d{${LOG_DATEFORMAT_PATTERN}}","level": "${LOG_LEVEL_PATTERN}","sleuthMsg":"[%X{X-B3-TraceId},%X{X-B3-SpanId},%X{X-B3-ParentSpanId},%X{X-Span-Export}]","PID":"${sys:PID}","threadName":"%t","threadId":"%tid","logger": "%c","msg": "%message"}%n</Property></Property>
    </Properties>
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT" follow="true">
            <PatternLayout pattern="${sys:CONSOLE_LOG_PATTERN}" />
        </Console>
    </Appenders>
    <Loggers>
        <Root level="INFO">
            <AppenderRef ref="Console" />
        </Root>
    </Loggers>
</Configuration>