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  • java8中的常用日期操作

    java8有很多时间上的新api,在操作时间的时候很好用,这儿算是个备忘录吧,(补充中。。。)

    定位某个时间:of方法

    LocalDateTime dateTime = LocalDateTime.of(2020, 2, 11, 13, 15, 12);
    LocalDate date = LocalDate.of(2020, 2, 11);

    计算两个时间的差值(day,hour,minute等)

    LocalDateTime dateTime1 = LocalDateTime.of(2020, 2, 11, 13, 15, 12);
    LocalDateTime dateTime2 = LocalDateTime.of(2020, 3, 11, 13, 15, 12);
    Duration between = Duration.between(dateTime1, dateTime2);
    System.out.println(between.toDays());
    System.out.println(between.toHours());
    System.out.println(between.toMinutes());

    对某个时间进行增加或者减少

    LocalDateTime dateTime = LocalDateTime.of(2020, 2, 11, 13, 15, 12);
    LocalDateTime t1 = dateTime.plusDays(1);
    System.out.println(t1);
    LocalDateTime t2 = dateTime.plusMonths(1);
    System.out.println(t2);

    获取某个时间是否为闰年

      

    LocalDateTime dateTime = LocalDateTime.of(2020, 2, 11, 13, 15, 12);
    boolean leapYear = dateTime.toLocalDate().isLeapYear();
    System.out.println(leapYear);
    boolean leap = Year.of(2016).isLeap();

    获取某月第一天,最后一天以及一共有多少天,以及当前月是第几月

    LocalDateTime dateTime = LocalDateTime.of(2020, 2, 11, 13, 15, 12);
    YearMonth month = YearMonth.from(dateTime);
    LocalDate begin = month.atDay(1);
    int length = month.lengthOfMonth();
    LocalDate end = month.atEndOfMonth(); 
    int monthValue = month.getMonthValue();

    格式化日期

    LocalDateTime dateTime = LocalDateTime.of(2020, 2, 11, 13, 15, 12);
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy年MM月dd日");
    String r = dateTime.format(formatter);
    TemporalAccessor parse = formatter.parse(r);
    LocalDate from = LocalDate.from(parse);
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  • 原文地址:https://www.cnblogs.com/hetutu-5238/p/12296094.html
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