LocalDate,LocalDateTime,Date及时间戳的转换

1.时间戳转LocalDateTime,时间戳如果是字符串则先转为long LocalDateTime localDateTime = LocalDateTime.ofEpochSecond(System.currentTimeMillis()/1000, 0, ZoneOffset.ofHours(8)); 2.日期字符串转LocalDate LocalDate parse = LocalDate.parse(“2020-05-13”); 3.LocalDateTime转LocalDate LocalDate localDate = LocalDateTime.now().toLocalDate();

4.Date转LocalDate Date date = new Date(); LocalDate localDate = date.toInstant().atZone(ZoneOffset.ofHours(8)).toLocalDate(); 或使用系统默认时区 LocalDate localDate = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate(); 5.时间戳转Date Date date = new Date(System.currentTimeMillis()); 或 date.setTime(System.currentTimeMillis()); 6.Date转LocalDateTime LocalDateTime localDateTime = LocalDateTime.ofInstant(new Date().toInstant(), ZoneId.systemDefault()); 7.LocalDateTime转Date Date date1 = Date.from(LocalDateTime.now().atZone(ZoneId.systemDefault()).toInstant()); 8.LocalDate转Date ZonedDateTime zonedDateTime = LocalDate.now().atStartOfDay(ZoneId.systemDefault()); Date date = Date.from(zonedDateTime.toInstant());

9.获取前一天0和24点时间戳 秒： long startTime = LocalDateTime.of(LocalDate.now().minusDays(1), LocalTime.MIN).toEpochSecond(ZoneOffset.of("+8")); long endTime = LocalDateTime.of(LocalDate.now().minusDays(1), LocalTime.MAX).toEpochSecond(ZoneOffset.of("+8")); 毫秒： long startTimeMill = LocalDateTime.of(LocalDate.now().minusDays(1), LocalTime.MIN).toInstant(ZoneOffset.of("+8")).toEpochMilli(); long endTimeMill = LocalDateTime.of(LocalDate.now().minusDays(1), LocalTime.MAX).toInstant(ZoneOffset.of("+8")).toEpochMilli(); 10.时间格式 //时间格式 DateTimeFormatter formatter = DateTimeFormatter.ofPattern(“yyyy-MM-dd HH:mm:ss”); System.out.println("formate: "+ now.format(formatter)); 11.获取时间差 startTime和endTime为LocalDateTime，获取相差多少天如下： long days = startTime.until(endTime,ChronoUnit.DAYS);

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