Java 函数类似于 C mktime()?



我正在将一些代码从C移植到Java中。我在 C 中有一行如下:

time_t t0 = mktime(&EpochTime); 

其中纪元时间定义为:

struct tm EpochTime;

struct tm定义为:

struct tm {
int tm_sec;     /* seconds after the minute - [0,59] */
int tm_min;     /* minutes after the hour - [0,59] */
int tm_hour;    /* hours since midnight - [0,23] */
int tm_mday;    /* day of the month - [1,31] */
int tm_mon;     /* months since January - [0,11] */
int tm_year;    /* years since 1900 */
int tm_wday;    /* days since Sunday - [0,6] */
int tm_yday;    /* days since January 1 - [0,365] */
int tm_isdst;   /* daylight savings time flag */
};

C 库函数time_t mktime(struct tm *timeptr)根据本地时区将timeptr指向的结构转换为time_t值。

在我的 Java 代码中,我可以创建静态类变量以及 setter/getter 来表示结构数据。是否有一种库/技术可以实现mktime()功能的设计目的?

使用 ZonedDateTime:

ZoneId zone = ZoneId.systemDefault();
ZonedDateTime dateTime = ZonedDateTime.of(
year + 1900,
month + 1,
dayOfMonth,
hours,
minutes,
seconds,
0,          // nanoseconds within second
zone);
long t = dateTime.toEpochSecond();
DayOfWeek wday = dateTime.getDayOfWeek();
int yday = dateTime.getDayOfYear();

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