格式化XML的日期以包含UTC偏移量

groovy

Java

Calendar c = Calendar.getInstance();  
long timeZoneOffset = c.timeZone.getOffset(c.getTimeInMillis())/(1000*60*60);
SimpleDateFormat formatter = new java.text.SimpleDateFormat(\"yyyy-MM-dd\'T\'HH:mm:ss\");
formatter.format(c.getTime()) + \"+0\" + timeZoneOffset + \":00\";

new SimpleDateFormat(\"yyyy-MM-dd\'T\'HH:mm:ss Z\")

2011-06-12T07:23:25.000+0300

+0300

+03:00

    Calendar c = ...
    String printDate = javax.xml.bind.DatatypeConverter.printDateTime(c);

xs:dateTime

 DateTime dt = new DateTime();
 DateTimeFormatter fmt = ISODateTimeFormat.dateTime();
 System.out.println(fmt.print(dt));

XMLGregorianCalendar

Calendar c = ...
DataTypeFactory f = DataTypeFactory.newInstance();
XMLGregorianCalendar xc = f.newXMLGregorianCalendar(c);
String str = xc.toXMLFormat();