Java 时间加减

public static String dateAddOrSubtract(String date ,String dateType,int day){
    /**

 
 * @Description     时间加N天或减去N天  用正负数来判断  整数为加一天  负数为减一天
 **/

try { SimpleDateFormat sdf= new SimpleDateFormat(dateType); Calendar calendar = Calendar. getInstance(); calendar.setTime(sdf.parse(date)); calendar.add(Calendar. DAY_OF_MONTH, day); String format = sdf.format(calendar.getTime()); return format; } catch (ParseException e) { e.printStackTrace(); } return null;}