Java日期推迟计算、日期大小 

 1  /**
 2      * 日期推迟计算
 3      * @param date
 4      * @param num
 5      * @return java.util.HashMap<java.lang.String,java.lang.String>
 6      */
 7     public static String dateAdd(String date, int num) throws ParseException {
 8         SimpleDateFormat sj = new SimpleDateFormat("yyyy-MM-dd");
 9         Date dateFormat = sj.parse(date);
10         Calendar calendar = Calendar.getInstance();
11         calendar.setTime(dateFormat);
12         calendar.add(calendar.DATE, num);
13         //System.out.println("期望日期：" + sj.format(calendar.getTime()));
14         return sj.format(calendar.getTime());
15     }
 1  /**
 2      * 是否超过指定日期
 3      *
 4      * @param
 5      * @return
 6      */
 7     public boolean dateJudge(String start, String end) throws ParseException {
 8         SimpleDateFormat sj = new SimpleDateFormat("yyyy-MM-dd");
 9         Date startDate = sj.parse(start);
10         Date endDate = sj.parse(end);
11         if (startDate.before(endDate)) {
12             return false;
13         } else {
14             return true;
15         }
16     }
 1  public static void main(String[] args) throws ParseException {
 2         String startDate = "2015-01-01";
 3         String endDate = "2015-01-15";
 4         String newDate = dateAdd(startDate, 1);
 5 
 6         while (dateJudge(newDate, endDate)) {
 7             String tempStartDate = dateAdd(newDate, -1);
 8             System.out.println(tempStartDate + "___" + newDate);
 9             newDate = dateAdd(newDate, 1);

10         }
11 
12     }

 

 1 public static void main(String[] args) throws ParseException {
 2         String startDate = "2015-01-01";
 3         String endDate = "2015-01-17";
 4         String newDate = startDate;
 5 
 6         while (dateJudge(newDate, endDate)) {
 7             if (dateJudge(dateAdd(newDate, 2), endDate)) {
 8                 System.out.println(newDate.concat(" 00:00:00__________") + dateAdd(newDate, 2).concat(" 23:59:59"));
 9                 newDate = dateAdd(newDate, 3);
10             } else {
11                 break;
12 
13             }
14         }
15         while (dateJudge(newDate, endDate)) {
16             System.out.println(newDate);
17             newDate = dateAdd(newDate, 1);
18         }
19     }

 

posted on 2018-04-11 21:13  小豫  阅读(1355)  评论(0)    收藏  举报

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