GregorianCalendar c = new GregorianCalendar();
c.setTime(yourDate);
XMLGregorianCalendar date2 = DatatypeFactory.newInstance().newXMLGregorianCalendar(c);

对于那些可能在这里结束寻找相反转换(从XMLGregorianCalendar到Date)的人:

XMLGregorianCalendar xcal = <assume this is initialized>;
java.util.Date dt = xcal.toGregorianCalendar().getTime();

看看这段代码:-

/* Create Date Object */
Date date = new Date();
XMLGregorianCalendar xmlDate = null;
GregorianCalendar gc = new GregorianCalendar();

gc.setTime(date);

try{
    xmlDate = DatatypeFactory.newInstance().newXMLGregorianCalendar(gc);
}
catch(Exception e){
    e.printStackTrace();
}

System.out.println("XMLGregorianCalendar :- " + xmlDate);

你可以在这里看到完整的例子

下面是一个从GregorianCalendar转换为XMLGregorianCalendar的方法;我将把从java.util.Date转换为GregorianCalendar的部分留给您作为练习:

import java.util.GregorianCalendar;

import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

public class DateTest {

   public static void main(final String[] args) throws Exception {
      GregorianCalendar gcal = new GregorianCalendar();
      XMLGregorianCalendar xgcal = DatatypeFactory.newInstance()
            .newXMLGregorianCalendar(gcal);
      System.out.println(xgcal);
   }

}

编辑:Slooow:-)

GregorianCalendar c = new GregorianCalendar();
c.setTime(yourDate);
XMLGregorianCalendar date2 = DatatypeFactory.newInstance().newXMLGregorianCalendar(c);

我只是想在下面加上我的解决方案，因为上面的答案并不能满足我的确切需求。我的Xml模式需要单独的Date和Time元素，而不是一个DateTime字段。上面使用的标准XMLGregorianCalendar构造函数将生成一个DateTime字段

注意这里有几个gothca，例如必须在月份中添加1(因为java从0开始计数月份)。

GregorianCalendar cal = new GregorianCalendar();
cal.setTime(yourDate);
XMLGregorianCalendar xmlDate = DatatypeFactory.newInstance().newXMLGregorianCalendarDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH)+1, cal.get(Calendar.DAY_OF_MONTH), 0);
XMLGregorianCalendar xmlTime = DatatypeFactory.newInstance().newXMLGregorianCalendarTime(cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), cal.get(Calendar.SECOND), 0);