Java之LocalDateTime解析及格式化

   /**
     * 日期格式
     */
    public interface Pattern {
        String HHMMSS = "HHmmss";
        String HH_MM_SS = "HH:mm:ss";
        String HH_MM = "HH:mm";
        String YYYY = "yyyy";
        String YYYYMMDD = "yyyyMMdd";
        String YYYYMM = "yyyyMM";
        String YYYY_MM_DD = "yyyy-MM-dd";
        String YYYY_DOT_MM_DOT_DD = "yyyy.MM.dd";
        String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";
        String YYYYMMDDHHMMSSSSS = "yyyyMMddHHmmssSSS";
        String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
    }

    public static LocalDate parseLocalDateFromString(String value, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return LocalDate.parse(value, formatter);
    }

    public static LocalTime parseLocalTimeFromString(String value, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return LocalTime.parse(value, formatter);
    }

    public static LocalDateTime parseLocalDateTimeFromString(String value, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return LocalDateTime.parse(value, formatter);
    }

    public static String localDateToString(LocalDate date, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return formatter.format(date);
    }

    public static String localTimeToString(LocalTime time, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return formatter.format(time);
    }

    public static String localDateTimeToString(LocalDateTime dateTime, String pattern) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return formatter.format(dateTime);
    }