Utils.java 文件源码

/**
 * Singleton pattern for logger
 * Adds a <code>ConsoleAppender</code> on initialization
 * @return <code>Logger</code>
 */
public static Logger getLogger() {
    if(logger == null) {
        logger = Logger.getRootLogger();
        ConsoleAppender appender = new ConsoleAppender();

        appender.setLayout(new PatternLayout("[%-5p] %d{HH:mm:ss.SSS} [%t] - %m %n"));
        appender.setThreshold(Level.ALL);
        appender.activateOptions();
        logger.addAppender(appender);
    }
    return logger;
}