Java 8 LocalDateTime
2019-11-06 本文已影响0人
xuanjiuye
| 操作符 | 功能 |
|---|---|
| now | 获取当前时间 |
| of | 获取指定时间 |
| plus | 加上指定数量的时间 |
| with | 调整时间返回新的副本 |
| adjustInto | 调整时间返回新的副本 |
| from | 转换TemporalAccessor为LocalDateTime |
| get | 得到LocalDateTime的指定字段的值 |
| range | 得到指定时间字段的范围 |
| until | 得到相差的时间 |
- now
//获取当前时间
LocalDateTime now = LocalDateTime.now();
System.out.println(now);
- of
//获取指定时间
LocalDateTime of = LocalDateTime.of(2019, Month.NOVEMBER, 06, 14, 30,01);
LocalDateTime of2 = LocalDateTime.of(2019, 11, 06, 14, 30,01);
System.out.println(of);
System.out.println(of2);
// 2019-11-06T14:30:01
// 2019-11-06T14:30:01
- plus
//时间加上半天
LocalDateTime of = LocalDateTime.of(2019, Month.NOVEMBER, 06, 14, 30,01);
LocalDateTime plus = of.plus(1, ChronoUnit.HALF_DAYS);
System.out.println(of);
System.out.println(plus);
// 2019-11-06T14:30:01
// 2019-11-07T02:30:01
- with
//设置分钟数
LocalDateTime of = LocalDateTime.of(2019, Month.NOVEMBER, 06, 14, 30,01);
LocalDateTime withMinute = of.withMinute(2);
System.out.println(of);
System.out.println(withMinute);
// 2019-11-06T14:30:01
// 2019-11-06T14:02:01
- adjustInto
//adjustInto与with 等价写法，调整时间
LocalDateTime of = LocalDateTime.of(2019, Month.NOVEMBER, 06, 14, 30,01);
LocalDateTime now = LocalDateTime.now();
Temporal temporal = now.adjustInto(of);
LocalDateTime with = of.with(now);
System.out.println(of);
System.out.println(temporal);
System.out.println(with);
// 2019-11-06T14:30:01
// 2019-11-06T16:11:49.547
// 2019-11-06T16:11:49.547
- from
//转换TemporalAccessor为LocalDateTime
LocalDateTime of = LocalDateTime.of(2019, Month.NOVEMBER, 06, 14, 30,01);
LocalDateTime from = of.from(LocalDateTime.now());
System.out.println(of);
System.out.println(from);
// 2019-11-06T14:30:01
// 2019-11-06T16:12:32.591
- get
//得到LocalDateTime的指定字段的值,这里获取天数
LocalDateTime of = LocalDateTime.of(2019, Month.NOVEMBER, 06, 14, 30,01);
int day = of.get(ChronoField.DAY_OF_MONTH);
System.out.println(of);
System.out.println(day);
// 2019-11-06T14:30:01
// 6
- range
//得返回指定时间字段的范围,这里获取一天的时间范围
LocalDateTime of = LocalDateTime.of(2019, Month.NOVEMBER, 06, 14, 30,01);
ValueRange range = of.range(ChronoField.HOUR_OF_DAY);
System.out.println(of);
System.out.println(range);
// 2019-11-06T14:30:01
// 0 - 23
- until
//返回相差的时间，这里是两个时间相差的分钟数
LocalDateTime of = LocalDateTime.of(2019, Month.NOVEMBER, 06, 14, 30,01);
long until = of.until(LocalDateTime.now(), ChronoUnit.MINUTES);
System.out.println(of);
System.out.println(until);
// 2019-11-06T14:30:01
// 104
