1 /** 2      * 返回2个日期间有多少股票周 3      * @param startDate 2012-02-01 开始日期 4      * @param endDate  2014-02-01   结束日期 5      * @return 6      */ 7     public static  int getStockWeeks(String  startDate,String endDate){ 8         int a = 0; 9         try {10             SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");11             Calendar before = Calendar.getInstance();12             Calendar after = Calendar.getInstance();13             Calendar temp = Calendar.getInstance();14             15             before.setTime(sdf.parse(startDate));16             after.setTime(sdf.parse(endDate));17             18             long time1 = before.getTime().getTime();19             long time2 = after.getTime().getTime();20             21             if(time1>time2){//开始和结束时间对换了(有可能前后时间给错了)22                 temp=before;23                 before=after;24                 after=temp;25             }26             27             int week = before.get(Calendar.DAY_OF_WEEK);28             29             before.add(Calendar.DATE, -week);//并非周一为第一天  周六为第一天  30             31             week = after.get(Calendar.DAY_OF_WEEK);32             33             if(week>0&&week<7)after.add(Calendar.DATE, 6 - week);34             if(week==7)after.add(Calendar.DATE, 6);35             a= (int) ((after.getTimeInMillis() - before36                     .getTimeInMillis()) / CONST_WEEK);37             a = a - 1;38             if (a == 0) {39                 a = 1;40             }41         } catch (Exception e) {42             e.printStackTrace();43         }44         return a;45     }46