The values set by MDC self4j log4j and mdc cannot be printed. Why?

question:
the printed result of my log is as follows:
[main] INFO Test-API input parameter =

I want to get a log like this: f9e287fad9e84cff8b2c2f2ed92adbe6 [main] INFO Test-API input parameter

1. My test class
import org.apache.log4j.MDC;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Test {

static Logger logger = LoggerFactory.getLogger(Test.class);

public static void main(String[] args) {
    MDC.clear();
    MDC.put("logid", "f9e287fad9e84cff8b2c2f2ed92adbe6");
    MDC.put("merchant_id", 1);
    MDC.put("siteName", "");
    MDC.put("userName", "userwyh");

    MDC.put("mobile", "110");

    MDC.put("mchId", 12);
    MDC.put("mchName", "");

    logger.info("===");

}

2. My log4j profile:

log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d {yy/MM/dd HH:mm:ss}% p% c {2}:% m% n

log4j.logger.com.rong360.crawler=info,console,info,warn,error,fatal
logging.path=e:/logs/crawler-meituan/logs

log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%-d {yyyy-MM-dd HH:mm:ss,SSS} [% p] [% l] [% tblog% r] [% X {logid}] [% X {ip}] [% X {uri}] [% X {merchant_id}] [% X {user_id}]% m% n
log4j.appender.console.Threshold=INFO

log4j.appender.debug=com.rong360.crawler.log4j.Rong360DailyRollingFileAppender
log4j.appender.debug.layout=org.apache.log4j.PatternLayout
log4j.appender.debug.layout.ConversionPattern=%-d {yyyy-MM-dd HH:mm:ss, SSS} [% p] [% l] [% turi% r] [% X {logid}] [% X {ip}] [% X {uri}] [% X {merchant_id}] [% X {user_id}]% m% n
log4j.appender.debug.Threshold = DEBUG
log4j.appender.debug.append=true
log4j.appender.debug.File=debug.log

log4j.appender.info=com.rong360.crawler.log4j.Rong360DailyRollingFileAppender
log4j.appender.info.layout=org.apache.log4j.PatternLayout
log4j.appender.info.append=true
log4j.appender.info.layout.ConversionPattern=%-d {yyyy-MM-dd HH:mm:ss, SSS} [% p] [% l] [% logid% r] [% X {logid}] [% X {ip}] [% X {uri}] [% X {merchant_id}] [% X {user_id}]% m% n
log4j.appender.info.Threshold = INFO
log4j.appender.info.File=info.log

log4j.appender.warn=com.rong360.crawler.log4j.Rong360DailyRollingFileAppender
log4j.appender.warn.layout=org.apache.log4j.PatternLayout
log4j.appender.warn.layout.ConversionPattern=%-d {yyyy-MM-dd HH:mm:ss, SSS} [% p] [% l] [% turi% r] [% X {logid}] [% X {ip}] [% X {uri}] [% X {merchant_id}] [% X {user_id}]% m% n
log4j.appender.warn.Threshold = WARN
log4j.appender.warn.append=true
log4j.appender.warn.File=warn.log

log4j.appender.error=com.rong360.crawler.log4j.Rong360DailyRollingFileAppender
log4j.appender.error.layout=org.apache.log4j.PatternLayout
log4j.appender.error.layout.ConversionPattern=%-d {yyyy-MM-dd HH:mm:ss, SSS} [% p] [% l] [% turi% r] [% X {logid}] [% X {ip}] [% X {uri}] [% X {merchant_id}] [% X {user_id}]% m% n
log4j.appender.error.Threshold = ERROR
log4j.appender.error.append=true
log4j.appender.error.File=error.log

log4j.appender.fatal=com.rong360.crawler.log4j.Rong360DailyRollingFileAppender
log4j.appender.fatal.layout=org.apache.log4j.PatternLayout
log4j.appender.fatal.layout.ConversionPattern=%-d {yyyy-MM-dd HH:mm:ss, SSS} [% p] [% l] [% turi% r] [% X {logid}] [% X {ip}] [% X {uri}] [% X {merchant_id}] [% X {user_id}]% m% n
log4j.appender.fatal.Threshold = FATAL
log4j.appender.fatal.append=true
log4j.appender.fatal.File=fatal.log

Log4j java

Mar.25,2021