Java（九）：LocalDate和LocalDateTime时间处理

清疚 2024-03-30 12:37 68阅读 0赞

#### 介绍 ####

对LocalDate和LocalDateTime时间处理做个总结。

LocalDateTime now = LocalDateTime.now();
    System.out.println("当前时间：" + now);
    System.out.println("格式化：" + now.format(DateTimeFormatter.ofPattern("YYYY-MM-dd hh:mm:ss")));
    LocalDateTime firstDay = now.withDayOfMonth(1);
    System.out.println("本月第一天：" + firstDay);
    LocalDateTime lastSecondOfDay = now.withHour(23).withMinute(59).withSecond(59);
    System.out.println("当天最后一秒：" + lastSecondOfDay);
    LocalDateTime lastDay = now.with(TemporalAdjusters.lastDayOfMonth());
    System.out.println("本月最后一天:" + lastDay);
     
    // 获取秒数时间戳（10位）
    LocalDateTime.now().toInstant(ZoneOffset.of("+8"));
    // 获取毫秒数时间戳（13位）
    LocalDateTime.now().toInstant(ZoneOffset.of("+8")).toEpochMilli();
     
    // 求时间差
    LocalDateTime now = LocalDateTime.now();
    System.out.println("计算两个时间的差：");
    LocalDateTime end = LocalDateTime.now();
    Duration duration = Duration.between(now, end);
    long days = duration.toDays(); //相差的天数
    long hours = duration.toHours();//相差的小时数
    long minutes = duration.toMinutes();//相差的分钟数
    long millis = duration.toMillis();//相差毫秒数
    long nanos = duration.toNanos();//相差的纳秒数
    System.out.println(now);
    System.out.println(end);
    System.out.println("耗时【 " + days + "天：" + hours + " 小时：" + minutes + " 分钟：" + millis + " 毫秒：" + nanos + " 纳秒】");