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：
  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
     
       getDateAndRate(String stime,String etime) throws ParseException{ 15         HashMap
      
        map=new HashMap
       
        (); 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
        
          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
         
           getDateListBetween2Day(String stime,String etime) throws ParseException{ 50         return getDateListBetween2Day(stime,etime,"yyyyMMdd"); 51     } 52      53     public static ArrayList
          
            getDateListBetween2Day(String stime,String etime,String date_pattern) throws ParseException{ 54 ArrayList
           
             list= new ArrayList
            
             (); 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：
             
 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 }