LocalDateTime、LocalDate、LocalTime相关使用记录（未完）

1.当前时间

LocalDateTime now = LocalDateTime.now();
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2.datetime字符串转localDateTime

LocalDateTime dateTime =LocalDateTime.parse("2022-06-30 10:00:00", DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
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3.date字符串转localDate

LocalDate localDate1=LocalDate.parse("2022-06-30", DateTimeFormatter.ofPattern("yyyy-MM-dd"));
LocalDate localDate2=LocalDate.parse("2022-06-18", DateTimeFormatter.ofPattern("yyyy-MM-dd"));
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4.time字符串转localTime

LocalTime Time=LocalTime.parse("18:00", DateTimeFormatter.ofPattern("HH:mm"));
LocalTime Time2=LocalTime.parse("18:00:30", DateTimeFormatter.ofPattern("HH:mm:ss"));
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5.localDate 拼 localTime 变成localDateTime

LocalDateTime localDateTime = localDate2.atTime(Time2);
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6.获取星期 THURSDAY

DayOfWeek dayOfWeek = localDateTime.getDayOfWeek();
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7.dayOfWeek.getValue() 获取数字 1234567

int value = dayOfWeek.getValue();
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8.两个localDate之间相差多少 正、负、0

Period period = Period.between(localDate2, localDate1);
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9.两个日期之间相差多少天， DAYS可换

long between = ChronoUnit.DAYS.between(localDate2, localDate1);
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10.两个localDateTime之前相差多少 正、负、0

Duration duration = Duration.between(localDateTime, dateTime);
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11.两个时间比较，2022-06-30.isAfter 2022-07-01 false 反之 true

boolean after = localDateTime.isAfter(dateTime);
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12.两个时间比较，2022-06-30.isBefore 2022-07-01 true 反之 false

boolean before = localDateTime.isBefore(dateTime);
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13.两个时间比较，2022-06-30.isEqual 2022-07-01 false 相等 true

boolean equal = localDateTime.isEqual(dateTime);
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