（个人笔记） java.util.logging.Logger 写日志

向日志写入文件

    public static Logger getLogger(String className){        Logger logger = Logger.getLogger(className);        String logPath = "log/log.log";   //要写相对路径        try {            FileHandler fh = new FileHandler(logPath);            logger.addHandler(fh);        } catch (IOException ex) {            Logger.getLogger(Util.class.getName()).log(Level.SEVERE, null, ex);        } catch (SecurityException ex) {            Logger.getLogger(Util.class.getName()).log(Level.SEVERE, null, ex);        }        return logger;    }