Date和String类型的相互转换

String转Date:

 SimpleDateFormat bartDateFormat = new SimpleDateFormat("MM-dd-yyyy");
 String dateStringToParse = "9-29-2001";
 Date date = bartDateFormat.parse(dateStringToParse);            

Date转String:

SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
date.format(new Date())