java8 获取当天的开始时间和结束时间

// 获取当天的零点
LocalDateTime startToday = LocalDateTime.of(LocalDate.now(), LocalTime.MIN);
System.out.println(startToday);
// 获取当天结束时间
LocalDateTime endToday = LocalDateTime.of(LocalDate.now(), LocalTime.MAX);
System.out.println(endToday);

String yyyyMMddHHmmss = startToday.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
System.out.println(yyyyMMddHHmmss);

## 输出
2020-04-26T00:00
2020-04-26T23:59:59.999999999
2020-04-26 00:00:00