民国纪年转公历

/**
 * 民国纪年转公历
 * 
 * @param twDateStr
 */
private Date dateChange(String twDateStr) {
	if (StringUtils.isBlank(twDateStr)) {
		return null;
	}
	Calendar calendar = Calendar.getInstance();
	SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
	Date date;
	try {
		date = format.parse(twDateStr);
		calendar.setTime(date);
		calendar.add(Calendar.YEAR, 1911);
		return calendar.getTime();
	} catch (ParseException e) {
		e.printStackTrace();
	}
	return null;
}