import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
publicclassDemo {privatestaticfinal Logger logger = LoggerFactory.getLogger(Demo.class);
publicstaticvoidmain(String[] args) {
//日志级别 TRACE < DEBUG < INFO < WARN < ERROR
logger.trace("this is a trace");
logger.debug("this is a debug");
logger.info("this is an info");
logger.warn("this is a warn");
logger.error("this is an error");
}
}