com.snail.exam.log4j.Log4jExamApplication? † package com.snail.exam.log4j; import org.apache.log4j.Logger; import com.snail.exam.log4j.app.buggy.BuggyClass; import com.snail.exam.log4j.app.gentle.GentleClass; public class Log4jExamApplication { private static Logger logger = Logger.getLogger(Log4jExamApplication.class); /** * @param args */ public static void main(String[] args) { logger.fatal("本当