Log4J配置文件实现了输出到控制台、文件、回滚文件、发送日志邮件、输出到数据库日志表、自定义标签等全套功能。择其一二使用就够用了-Log4J configuration file output to the console, file, rollback file, send log messages output to the database log table, a full set of features such as custom labels. Choosing the twel