转javax.xml.datatype.XMLGregorianCalendar

原文：http://xiyangzk.iteye.com/blog/813936

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());

  //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());

     

 

附：java.util.GregorianCalendar与java.util.Date的关系如同日历与日历中的某一页。java.util.GregorianCalendar与.Net类型DateTime更相像。