Java8 常用时间获取

1、获取当前的时间

LocalDateTime nowDateTime = LocalDateTime.now();

DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

System.out.println(dateTimeFormatter.format(nowDateTime));

// 反着使用也可以

System.out.println(nowDateTime.format(dateTimeFormatter));

2、获取当前时间1小时之前的时间

LocalDateTime nowDateTime= LocalDateTime.now();

LocalDateTime oneHourBeforeTime= nowDateTime.minus(1, ChronoUnit.HOURS);

3、获取当前时间一小时之后的时间

LocalDateTime nowDateTime= LocalDateTime.now();

LocalDateTime oneHourAfterTime= nowDateTime.plusHours(1);

4、获取时间的时分秒和获取时间和获取某一天的开始时间

DateTimeFormatter dateTimeFormatter= DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");

LocalDateTime nowTime= LocalDateTime.now();

LocalDate nowDate= LocalDate.now();

int hour= nowTime.getHour();

int minute= nowTime.getMinute();

int second= nowTime.getSecond();

System.out.println(minute%10);

LocalTime min= LocalTime.MIN;

// 获取今天的开始时间

LocalDateTime localTime= LocalDateTime.of(nowDate,LocalTime.MIN);