javax.xml.datatype.XMLGregorianCalendar和java.util.Date相互转换

/**
     * 把Date转为XMLGregorianCalendar
     * @param date
     * @return
     */
    public static XMLGregorianCalendar dateToXmlGregorianCalendar(Date date) {
        if(date==null) {
            return null;
        }
        GregorianCalendar gregorianCalendar = new GregorianCalendar();
        gregorianCalendar.setTime(date);
        try {
            return DatatypeFactory.newInstance().newXMLGregorianCalendar(gregorianCalendar);
        } catch (DatatypeConfigurationException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }


    /**
     * 把XMLGregorianCalendar转为Date
     * @param xmlGregorianCalendar
     * @return
     */
    public static Date xmlGregorianCalendarToDate(XMLGregorianCalendar xmlGregorianCalendar) {
        if(xmlGregorianCalendar==null) {
            return null;
        }
        return xmlGregorianCalendar.toGregorianCalendar().getTime();
    }