javax.xml.datatype.XMLGregorianCalendar

javax.xml.datatype.XMLGregorianCalendar 

XMLGregorianCalendar是GregorianCalendar（格里历，阳历）在XML领域中的对应类，算是Webservice、JAXB这些应用经常出现的关于日期时间的经典入门问题。

 

使用javax.xml.datatype.DatatypeFactory、java.text.SimpleDateFormat、java.util.GregorianCalendar可以轻松解决XMLGregorianCalendar相关问题。

 

//GregorianCalendar-〉XMLGregorianCalendar
      GregorianCalendar nowGregorianCalendar =new GregorianCalendar();
      XMLGregorianCalendar xmlDatetime= DatatypeFactory.newInstance().newXMLGregorianCalendar(nowGregorianCalendar);
      //XMLGregorianCalendar ->GregorianCalendar
      nowGregorianCalendar = xmlDatetime.toGregorianCalendar();
      //GregorianCalendar->String
      SimpleDateFormat simpleDateFormat =new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
      String dateTimeString=simpleDateFormat.format(nowGregorianCalendar.getTime());
      //GregorianCalendar->Date
      Date date = nowGregorianCalendar.getTime();
      //Date->GregorianCalendar
      nowGregorianCalendar.setTime(date);

      //String->Date
      date=simpleDateFormat.parse("1981-07-22 00:00:00");
      //Date->String
      String dateString=simpleDateFormat.format(date.getTime());

      //Sring->XMLGregorianCalendar
      nowGregorianCalendar.setTime(simpleDateFormat.parse("1981-07-22 00:00:00"));
      xmlDatetime= DatatypeFactory.newInstance().newXMLGregorianCalendar(nowGregorianCalendar);
      //XMLGregorianCalendar->Sring
      simpleDateFormat.format(xmlDatetime.toGregorianCalendar().getTime());