1. Convert LocalDateTime to a custom time format string
//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. Convert long type timestamp to 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. Convert LocalDateTime to long type timestamp
public static long getTimestampOfDateTime(LocalDateTime localDateTime) {
ZoneId zone = ZoneId.systemDefault();
Instant instant = localDateTime.atZone(zone).toInstant();
return instant.toEpochMilli();
}
4. Convert a time string to a LocalDateTime in a custom time format
// 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. Timestamp to specific time format
// 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);
}
The way to get the timestamp: 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