Java新特性玩转JDK8之时间⽇期处理类超级大汇总—

JDK8之后：引⼊线程安全的⽇期与时间DateTimeFormatter

LocalDateTime ldt = LocalDateTime.now();
System.out.println(ldt);
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy-MM-dd
HH:mm:ss");
String ldtStr = dtf.format(ldt);
System.out.println(ldtStr);

获取指定的⽇期时间对象

LocalDateTime ldt = LocalDateTime.of(2020, 11, 11, 8, 20, 30);
System.out.println(ldt);

计算⽇期时间差 java.time.Duration

LocalDateTime today = LocalDateTime.now();
 System.out.println(today);
 LocalDateTime changeDate = LocalDateTime.of(2020,10,1,10,40,30);
 System.out.println(changeDate);
 Duration duration = Duration.between( today,changeDate);//第⼆个参数减第⼀
个参数
 System.out.println(duration.toDays());//两个时间差的天数
 System.out.println(duration.toHours());//两个时间差的⼩时数
 System.out.println(duration.toMinutes());//两个时间差的分钟数
 System.out.println(duration.toMillis());//两个时间差的毫秒数
 System.out.println(duration.toNanos());//两个时间差的纳秒数

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