根据时间字符串获取去年的该时间,看着玩儿吧

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		    	Date date = sdf.parse(startTime);
		    	calendar.setTime(date);
				for(int i = 0; i < 12;i++){
					calendar.set(Calendar.MONTH,i);
					SimpleDateFormat df = new SimpleDateFormat("yyyy-MM");
					timeContainer.add(df.format(calendar.getTime()));
				}
				//今年数据  yyyy-mm
				for(String month:timeContainer){
					Map mapResult = countDao.getMonthPersonalScore(policeNo,month,
							dayStartTime,dayEndTime,nightStartTime,nightEndTime,dayJd,nightJd);
					currentCountMapList.add(mapResult);
				}
				//去年数据 
				calendar.add(Calendar.YEAR, -1);
				timeContainer = new ArrayList<>();
				for(int i = 0; i < 12;i++){
					calendar.set(Calendar.MONTH,i);
					SimpleDateFormat df = new SimpleDateFormat("yyyy-MM");
					timeContainer.add(df.format(calendar.getTime()));
				}
				for(String month:timeContainer){
					Map mapResult = countDao.getMonthPersonalScore(policeNo,month,
							dayStartTime,dayEndTime,nightStartTime,nightEndTime,dayJd,nightJd);
					beforeCountMapList.add(mapResult);
				}

/*SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		    	Date date = sdf.parse(startTime);
		    	String yearMonthDayStr = sdf.format(date);
		    	String yearMonthDayArr[] = yearMonthDayStr.split("-");
		    	//将时间设为当月的第一天
		    	calendar.set(Integer.parseInt(yearMonthDayArr[0]), Integer.parseInt(yearMonthDayArr[1])-1, 1);
		    	// 月份调至下个月
		    	calendar.add(Calendar.MONTH,1);
		    	// 时间减去一天（就等于上个月的最后一天）
		    	calendar.add(Calendar.DAY_OF_MONTH, -1); 
		    	//调取当月的天数
		    	int monthNum=calendar.get(Calendar.DAY_OF_MONTH);
		    	for(int i = 1; i <= monthNum;i++){
		    		calendar.set(Integer.parseInt(yearMonthDayArr[0]), Integer.parseInt(yearMonthDayArr[1])-1, i);
					SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
					timeContainer.add(df.format(calendar.getTime()));
				}
		    	//本月数据
		    	for(String month:timeContainer){
					Map mapResult = countDao.getDayPersonalScore(policeNo,month,
							dayStartTime,dayEndTime,nightStartTime,nightEndTime,dayJd,nightJd);
					currentCountMapList.add(mapResult);
				}
		    	//去年当月数据
		    	calendar.add(Calendar.YEAR,-1);
		    	timeContainer = new ArrayList<>();
		    	int preMonthNum = calendar.get(Calendar.DAY_OF_MONTH);
		    	for(int i = 1; i <= preMonthNum;i++){
		    		calendar.set(Integer.parseInt(yearMonthDayArr[0])-1, Integer.parseInt(yearMonthDayArr[1])-1,i);
					SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
					timeContainer.add(df.format(calendar.getTime()));
				}
		    	for(String month:timeContainer){
					Map mapResult = countDao.getDayPersonalScore(policeNo,month,
							dayStartTime,dayEndTime,nightStartTime,nightEndTime,dayJd,nightJd);
					beforeCountMapList.add(mapResult);
				}*/

/*SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH");
		    	Date date = sdf.parse(startTime);
		    	String yearMonthDayStr = sdf.format(date);
		    	String dayArr[] = yearMonthDayStr.split(" ");
		    	yearMonthDayStr = dayArr[0];
		    	String yearMonthDayArr[] = yearMonthDayStr.split("-");
		    	//将时间设为当月的第一天
		    	calendar.set(Integer.parseInt(yearMonthDayArr[0]), 
		    			Integer.parseInt(yearMonthDayArr[1])-1, Integer.parseInt(yearMonthDayArr[2]));
		    	//调取当月的天数
		    	int monthNum=24;
		    	for(int i = 0; i < monthNum;i++){
		    		calendar.set(Calendar.HOUR_OF_DAY,i);
					SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH");
					timeContainer.add(df.format(calendar.getTime()));
				}
		    	//当天数据
		    	for(String month:timeContainer){
					Map mapResult = countDao.getHourPersonalScore(policeNo,month,
							dayStartTime,dayEndTime,nightStartTime,nightEndTime,dayJd,nightJd);
					currentCountMapList.add(mapResult);
				}
		    	//去年同天数据
		    	calendar.add(Calendar.YEAR,-1);
		    	timeContainer = new ArrayList<>();
		    	for(int i = 0; i < monthNum;i++){
		    		calendar.set(Calendar.HOUR_OF_DAY,i);
					SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH");
					timeContainer.add(df.format(calendar.getTime()));
				}
		    	for(String month:timeContainer){
					Map mapResult = countDao.getHourPersonalScore(policeNo,month,
							dayStartTime,dayEndTime,nightStartTime,nightEndTime,dayJd,nightJd);
					beforeCountMapList.add(mapResult);
				}*/