写的一个工具，从一个时间段内获取这些详细的日期list
1 2 /** 3 * 从一段日期中,获取每个日期在整个时间段内的占比 4 * --------------------------------------------------------------------- 5 * -- Example：<br> 6 * -- 输入 20190313 12:00:00 和 20190315 12:00:00 7 * -- 输出 [20190313,0.25] [20190314,0.5] [20190315,0.25] 8 * --------------------------------------------------------------------- 13 */ 14 public static HashMap<String, Double> getDateAndRate(String stime,String etime) throws ParseException{ 15 HashMap<String, Double> map=new HashMap<String, Double>(); 16 SimpleDateFormat df=new SimpleDateFormat("yyyyMMdd HH:mm:ss"); 17 long s0=df.parse(stime).getTime(); 18 long s1=df.parse(etime).getTime(); 19 long all=s1-s0; 20 21 ArrayList<String> list =getDateListBetween2Day(stime,etime); 22 if(list.size()==1) { 23 map.put(list.get(0), 1.00D); 24 }else { 25 for(int i=1;i<list.size()-1;i++) { 26 double res=86400000.00D/all; 27 map.put(list.get(i), res); 28 } 29 Double s0_rate=1.00D*getSecondEnd(s0)/all; 30 map.put(list.get(0), s0_rate); 31 Double s1_rate=1.00D*getSecondStart(s1)/all; 32 map.put(list.get(list.size()-1), s1_rate); 33 } 34 return map; 35 } 36 37 /** 38 * 从一段时间段中获取所有日期 39 * --------------------------------------------------------------------- 40 * -- Example： 41 * -- 输入 20190313 12:00:00 和 20190315 12:00:00 42 * -- 输出 20190313 20190314 20190315 43 * --------------------------------------------------------------------- 48 */ 49 public static ArrayList<String> getDateListBetween2Day(String stime,String etime) throws ParseException{ 50 return getDateListBetween2Day(stime,etime,"yyyyMMdd"); 51 } 52 53 public static ArrayList<String> getDateListBetween2Day(String stime,String etime,String date_pattern) throws ParseException{ 54 ArrayList<String> list= new ArrayList<String>(); 55 SimpleDateFormat df=new SimpleDateFormat(date_pattern); 56 Calendar cal = Calendar.getInstance(); 57 Date sdate=df.parse(stime); 58 Date edate=df.parse(etime); 59 cal.setTime(sdate); 60 while(edate.after(sdate)) { 61 list.add(df.format(sdate)); 62 cal.add(Calendar.DAY_OF_MONTH,1); 63 sdate=cal.getTime(); 64 } 65 list.add(df.format(edate)); 66 return list; 67 } 68 69 /** 70 * 获取该时间戳距当天结束的时间 71 * --------------------------------------------------------------------- 72 * -- Example：<br> 73 * -- 输入 20190313 12:00:00 的longtime值 74 * -- 输出 20190313 12:00:00距20190313 24:00:00的毫秒差 75 * --------------------------------------------------------------------- 78 */ 79 public static long getSecondEnd(long longdate){ 80 Calendar cal = Calendar.getInstance(); 81 cal.setTimeInMillis(longdate); 82 cal.set(Calendar.HOUR_OF_DAY, 24); 83 cal.set(Calendar.MINUTE, 0); 84 cal.set(Calendar.SECOND, 0); 85 long max =cal.getTimeInMillis(); 86 return max-longdate; 87 } 88 89 /** 90 * 获取该时间戳距当天开始的时间 91 * --------------------------------------------------------------------- 92 * -- Example： 93 * -- 输入 20190313 12:00:00 的longtime值 94 * -- 输出 20190313 12:00:00距20190313 00:00:00的毫秒差 95 * --------------------------------------------------------------------- 98 */ 99 public static long getSecondStart(long longdate){ 100 Calendar cal = Calendar.getInstance(); 101 cal.setTimeInMillis(longdate); 102 cal.set(Calendar.HOUR_OF_DAY, 0); 103 cal.set(Calendar.MINUTE, 0); 104 cal.set(Calendar.SECOND, 0); 105 long min =cal.getTimeInMillis(); 106 return longdate-min; 107 }