我有2個類。首先包含日曆字段和整數字段(tz偏移量)。其次包含XmlGregorianCalendar字段。我想比較從第一級到第二級的日期。將XMLGregorianCalendar轉換爲GregorianCalendar的正確方法
Calendar cal1 = (Calendar) SerializationUtils.clone(firstClass.getDepartureDatetime());
cal1.add(Calendar.MINUTE, -firstClass.getDepartureTzOffset());
GregorianCalendar cal2 = secondClass.getDepartureDateTime().toGregorianCalendar();
cal2.add(Calendar.MINUTE, -secondClass.getDepartureDateTime().getTimezone());
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(" - Second [" + DateFormat.getDateTimeInstance().format(cal2.getTime()) + "]");
LOGGER.debug(" - First [" + DateFormat.getDateTimeInstance().format(cal1.getTime()) + "]");
}
我已經在該類中設置了相同的日期(11月19日上午9:00 GMT + 1)。
根據系統TZ它示出了不同的結果(在GMT TZ):
的Debian萊尼,TZ是CET:
Second [Nov 19, 2011 7:00:00 AM] - wrong!
First [Nov 19, 2011 8:00:00 AM] -right!
Win7的,TZ爲GMT + 3:
Second [Nov 19, 2011 8:30:00 AM] - wrong!
First [Nov 19, 2011 8:00:00 AM] -right!
我在做什麼錯了?
謝謝。
UPDATE
第一和第二類:
public class FirstClass implements Serializable {
private static final long serialVersionUID = -1150341618306402800L;
private Calendar departureDatetime;
private Integer departureTzOffset;
public Calendar getDepartureDatetime() {
return departureDatetime;
}
public void setDepartureDatetime(Calendar departureDatetime) {
this.departureDatetime = departureDatetime;
}
public Integer getDepartureTzOffset() {
return departureTzOffset;
}
public void setDepartureTzOffset(Integer departureTzOffset) {
this.departureTzOffset = departureTzOffset;
}
}
public class SecondClass implements Serializable
{
private final static long serialVersionUID = 12345L;
protected XMLGregorianCalendar departureDateTime;
public XMLGregorianCalendar getDepartureDateTime() {
return departureDateTime;
}
public void setDepartureDateTime(XMLGregorianCalendar value) {
this.departureDateTime = value;
}
}
SerializationUtils是Apache公地琅LIB的org.apache.commons.lang.SerializationUtils。
你可以簡化那個測試案例嗎?取出firstClass和secondClass和SerializationUtils.clone – Thilo
@Thilo查看更新 – ninja