Java 如何获取GMT的unixtimestamp
下面的函数给出设备中当前时间的unixtimeJava 如何获取GMT的unixtimestamp,java,blackberry,unix-timestamp,gmt,Java,Blackberry,Unix Timestamp,Gmt,下面的函数给出设备中当前时间的unixtime public static long get_unix_time2(long seconds_since_midnight_gmt, int day_of_month) { long m_time = 0; Calendar cal = Calendar.getInstance(); cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)); cal.
public static long get_unix_time2(long seconds_since_midnight_gmt,
int day_of_month) {
long m_time = 0;
Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH));
cal.set(Calendar.YEAR, cal.get(Calendar.YEAR));
cal.set(Calendar.DAY_OF_MONTH, day_of_month);
m_time = cal.getTime().getTime();
//Date current = Calendar.getInstance().getTime();
//Date dateTime = new Date();
//long diffInSeconds = (current.getTime() - dateTime.getTime()) / 1000;
//long min = (diffInSeconds = (diffInSeconds / 60)) >= 60 ? //diffInSeconds % 60
// : diffInSeconds;
// m_time = m_time - (min * -3600 * 1000);
return m_time;
}
如何更改unixtime,以便将设备的时间替换为从午夜开始的秒数gmt值作为参数接收。您可以设置Calendarobject的值 java.time 旧版日期时间API java.util日期时间类型及其格式类型SimpleDateFormat已过时且容易出错。建议完全停止使用它,并切换到java.time,即* 使用现代API的解决方案: 输出: 从中了解有关*的更多信息 *无论出于何种原因,如果您必须坚持使用Java6或Java7,您可以使用哪个backport将大部分Java.time功能移植到Java6&7。如果您正在为Android项目工作,并且您的Android API级别仍然不符合Java-8,请检查并确认。
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.MILLISECOND, 0);
cal.set(Calendar.SECOND, (int) seconds_since_midnight_gmt);
import java.time.Duration;
import java.time.YearMonth;
import java.time.ZoneId;
public class Main {
public static void main(String[] args) {
//Test
System.out.println(getUnixTime2(10000, 16));
}
public static long getUnixTime2(long secondsSinceMidnightGmt, int dayOfMonth) {
return YearMonth.now()
.atDay(dayOfMonth)
.atStartOfDay(ZoneId.systemDefault())
.plus(Duration.ofSeconds(secondsSinceMidnightGmt))
.toInstant()
.toEpochMilli();
}
}
1621129600000