java8中时间的互相转换(LocalDateTime) 野性酷女 2024-04-07 14:17 22阅读 0赞 ## 1.将LocalDateTime转为自定义的时间格式的字符串 ## //localDateTime 代表需要转换的时间;format代表自己定义的时间样式 public static String getDateTimeAsString(LocalDateTime localDateTime, String format) { DateTimeFormatter formatter = DateTimeFormatter.ofPattern(format); return localDateTime.format(formatter); } ## 2.将long类型的timestamp转为LocalDateTime ## // timestamp可以通过long l = System.currentTimeMillis();这种方式去获取到,当然也可以通过其他的方式获取 public static LocalDateTime getDateTimeOfTimestamp(long timestamp) { Instant instant = Instant.ofEpochMilli(timestamp); ZoneId zone = ZoneId.systemDefault(); return LocalDateTime.ofInstant(instant, zone); } ## 3.将LocalDateTime转为long类型的timestamp ## public static long getTimestampOfDateTime(LocalDateTime localDateTime) { ZoneId zone = ZoneId.systemDefault(); Instant instant = localDateTime.atZone(zone).toInstant(); return instant.toEpochMilli(); } ## 4.将某时间字符串转为自定义时间格式的LocalDateTime ## // time 是需要被格式化的时间字符串 // format 是自己定义的时间格式 public static LocalDateTime parseStringToDateTime(String time, String format) { DateTimeFormatter df = DateTimeFormatter.ofPattern(format); return LocalDateTime.parse(time, df); } ## 5.时间戳转特定的时间格式 ## // timestamp是时间戳,注意:所有的时间戳均为long类型 // format是自己定义的时间格式 public static String getDateTimeOfTimestamp(long timestamp, String format) { Instant instant = Instant.ofEpochMilli(timestamp); ZoneId zone = ZoneId.systemDefault(); LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone); DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(format); return dateTimeFormatter.format(localDateTime); } 获取时间戳的方式:[https://blog.csdn.net/qq\_41774102/article/details/126759334csdn\_share\_tail=%7B%22type%22%3A%22blog%22%2C%22rType%22%3A%22article%22%2C%22rId%22%3A%22126759334%22%2C%22source%22%3A%22qq\_41774102%22%7D][https_blog.csdn.net_qq_41774102_article_details_126759334csdn_share_tail_7B_22type_22_3A_22blog_22_2C_22rType_22_3A_22article_22_2C_22rId_22_3A_22126759334_22_2C_22source_22_3A_22qq_41774102_22_7D] [https_blog.csdn.net_qq_41774102_article_details_126759334csdn_share_tail_7B_22type_22_3A_22blog_22_2C_22rType_22_3A_22article_22_2C_22rId_22_3A_22126759334_22_2C_22source_22_3A_22qq_41774102_22_7D]: https://blog.csdn.net/qq_41774102/article/details/126759334?csdn_share_tail=%7B%22type%22%3A%22blog%22%2C%22rType%22%3A%22article%22%2C%22rId%22%3A%22126759334%22%2C%22source%22%3A%22qq_41774102%22%7D
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