[英]How to convert Java Date to OADate or vice versa?
我想将Java Date转换为Microsoft OLE Automation-OADate类型,或者想将OADate转换为Java Date。 OADate for Java的公式是什么? 实际上,我已经在stackoverflow中进行了搜索,但找不到答案,我得到了答案,并希望在此社区中分享它。
例如: 43013.7659837837963等于2017年10月5日星期四18:23:01
Microsoft的Java OLE自动化日期转换器
/**
* Convert Date to Microsoft OLE Automation - OADate type
* @param date
* @return
* @throws ParseException
*/
public static String convertToOADate(Date date) throws ParseException {
double oaDate;
SimpleDateFormat myFormat = new SimpleDateFormat("dd MM yyyy");
Date baseDate = myFormat.parse("30 12 1899");
Long days = TimeUnit.DAYS.convert(date.getTime() - baseDate.getTime(), TimeUnit.MILLISECONDS);
oaDate = (double) days + ((double) date.getHours() / 24) + ((double) date.getMinutes() / (60 * 24)) + ((double) date.getSeconds() / (60 * 24 * 60));
return String.valueOf(oaDate);
}
/**
* Convert Microsoft un OLE Automation - OADate to Java Date.
* @param date
* @return
* @throws ParseException
*/
public static Date convertFromOADate(double d) throws ParseException {
double mantissa = d - (long) d;
double hour = mantissa*24;
double min =(hour - (long)hour) * 60;
double sec=(min- (long)min) * 60;
SimpleDateFormat myFormat = new SimpleDateFormat("dd MM yyyy");
Date baseDate = myFormat.parse("30 12 1899");
Calendar c = Calendar.getInstance();
c.setTime(baseDate);
c.add(Calendar.DATE,(int)d);
c.add(Calendar.HOUR,(int)hour);
c.add(Calendar.MINUTE,(int)min);
c.add(Calendar.SECOND,(int)sec);
return c.getTime();
}
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