java 日期递增

　　

     public static void main(String[] args) throws ParseException {
         // 方法一
 //        Format f = new SimpleDateFormat("yyyy-MM-dd");
 //
 //        Date today = new Date();
 //        System.out.println("今天是:" + f.format(today));
 //
 //        Calendar c = Calendar.getInstance();
 //        c.setTime(today);
 //        c.add(Calendar.DAY_OF_MONTH, 1);// 今天+1天
 //
 //        Date tomorrow = c.getTime();
 //        System.out.println("明天是:" + f.format(tomorrow));

         // 方法二
         List<NutMap> maps = new ArrayList<NutMap>();
         SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
         Calendar cal = Calendar.getInstance();
         cal.setTime(new Date());
         int sum = 3;
         int i = 0;
         for (int j = 0; j < sum ; j++) {
             cal.add(cal.DATE, 1);
             if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY || cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
                 sum++;
             } else {
                 NutMap map = new NutMap();
                 map.addv("data" + i, format.format(cal.getTime()));
                 i++;
                 maps.add(map);
             }
         }
         System.out.println(maps);
     }