1 　　　　//java8 时间API的更新
 2         Clock clock=Clock.systemUTC();
 3         System.out.println(clock.millis());
 4         //时间线 Instant
 5         Instant instant =Instant.now();
 6         Thread.sleep(1000);
 7         Instant end = Instant.now();
 8         //时间间隔 duration
 9         Duration duration=Duration.between(instant, end);
10         System.out.println("this time :"+duration.toMillis());
11         //本地日期 没有时分秒的
12         LocalDate localDate= LocalDate.now();　　　　　　//TemporalAjusters 时间运算
13         LocalDate localDate1=    localDate.with(TemporalAdjusters.dayOfWeekInMonth(2, DayOfWeek.FRIDAY));
14         System.out.println(localDate1);
15         //自定义日期矫正器 利用plus*方法可以很方便对时间进行运行
16
17         TemporalAdjuster Next_WorkDay = w -> {//自定义校正器
18             LocalDate resultDate = (LocalDate) w;
19             do {
20                 resultDate = resultDate.plusMonths(1).plusDays(-1);
21             } while (resultDate.getDayOfWeek().getValue() >= 6);
22             return resultDate;
23         };
24
25         LocalDate localDate2 =localDate1.with(Next_WorkDay);
26         System.out.println("下个月的时间"+localDate2);
27         //时间格式,关键是本地时间!!用有时分秒的
28         LocalDateTime localDateTime = LocalDateTime.now();
29          System.out.println("time type:"+DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM).format(
30                     localDateTime));// 语言相关格式 时间格式转换也封装比较好了
31
32          System.out.println("time type:"+DateTimeFormatter.ofPattern("yyyy/mm/dd hh").format(
33                     localDateTime));