动态修改日志级别

import org.apache.log4j.Level;
import org.apache.log4j.LogManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

  private void updateLogLevel(String levelString) {
        if (StringUtils.isNotBlank(levelString) && !"null".equalsIgnoreCase(levelString)) {
            Enumeration logs = LogManager.getCurrentLoggers();
            logger.error("begain updateLogLevel,level:{}", levelString);
            while (logs.hasMoreElements()) {
                org.apache.log4j.Logger logger = (org.apache.log4j.Logger) logs.nextElement();
                //zookeeper中的不管，有些类的debug日志太恐怖
                if(logger.getName().indexOf("org.apache.zookeeper")>=0){
                    continue;
                }
                logger.error("before package name "+logger.getName()+",and level:"+logger.getEffectiveLevel());

                Level level = Level.toLevel(levelString);
                logger.setLevel(level);
                logger.error("after package name "+logger.getName()+",and level:"+logger.getEffectiveLevel());
            }
            logger.error("after updateLogLevel,level:{}", levelString);
        }
    }