Java jdk1.8 LocalDateTime 時間戳轉換

LocalDateTime和時間戳互轉

  /**
     * 獲取到毫秒級時間戳
     * @param localDateTime 具體時間
     * @return long 毫秒級時間戳
     */
    public static long toEpochMilli(LocalDateTime localDateTime){
        return localDateTime.toInstant(ZoneOffset.of("+8")).toEpochMilli();
    }

    /**
     * 毫秒級時間戳轉 LocalDateTime
     * @param epochMilli 毫秒級時間戳
     * @return LocalDateTime
     */
    public static LocalDateTime ofEpochMilli(long epochMilli){
        return LocalDateTime.ofInstant(Instant.ofEpochMilli(epochMilli), ZoneOffset.of("+8"));
    }

    /**
     * 獲取到秒級時間戳
     * @param localDateTime 具體時間
     * @return long 秒級時間戳
     */
    public static long toEpochSecond(LocalDateTime localDateTime){
        return localDateTime.toEpochSecond(ZoneOffset.of("+8"));
    }

    /**
     * 秒級時間戳轉 LocalDateTime
     * @param epochSecond 秒級時間戳
     * @return LocalDateTime
     */
    public static LocalDateTime ofEpochSecond(long epochSecond){
        return LocalDateTime.ofEpochSecond(epochSecond, 0,ZoneOffset.of("+8"));
    }

LocalDateTime和Date互轉

    /**
     * Date時間類轉LocalDateTime
     * @param date Date時間類
     * @return LocalDateTime
     */
    public static LocalDateTime ofDate(Date date){
        return date.toInstant().atOffset(ZoneOffset.of("+8")).toLocalDateTime();
    }

    /**
     * LocalDateTime時間類轉 Date時間類
     * @param localDateTime LocalDateTime時間類
     * @return Date時間類
     */
    public static Date toDate(LocalDateTime localDateTime){
        return Date.from(localDateTime.atZone(ZoneOffset.of("+8")).toInstant());
    }

LocalDateTime和字符串互轉

    /**
     * LocalDateTime轉時間格式字符串
     * @param localDateTime 時間
     * @return string 
     */
    public static String formatToString(LocalDateTime localDateTime){
        String format  = "yyyy:MM:dd HH:mm:ss";
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(format);
        return localDateTime.format(dateTimeFormatter);
    }

    /**
     *  時間字符串 轉LocalDateTime
     * @param localDateTime  時間字符串
     * @return LocalDateTime
     */
    public static LocalDateTime stringToFormat(String localDateTime){
        String format  = "yyyy:MM:dd HH:mm:ss";
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(format);
        return LocalDateTime.parse(localDateTime,dateTimeFormatter);
    }