获取当前时间近12个月的集合

public static String[] getLast12Months(Date timeDay){
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
            String time = sdf.format(timeDay);
            //处理月份输入条件
            if(time.length()==7){
                time=time+"-01 00:00:00";
            }else if(time.length()==110){
                time=time.substring(0,7)+"-01 00:00:00";
            }
            Date date = new Date();
            SimpleDateFormat sdp = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
            try {
                date= sdp.parse(time);
            } catch (Exception e) {
                return null;
            }
            String[] last12Months = new String[12];
            Calendar cal = Calendar.getInstance();
            //设置输入条件时间
            cal.setTime(date);
            //要先+1,才能把本月的算进去
            cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)+1);
            for(int i=0; i<12; i++){
                //逐次往前推1个月
                cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)-1);
                last12Months[11-i] = cal.get(Calendar.YEAR)+ "-" + addZeroForNum(String.valueOf(cal.get(Calendar.MONTH)+1), 2);
            }
            return last12Months;
        }
        public static String addZeroForNum(String str, int strLength) {
            int strLen = str.length();
            if (strLen < strLength) {
                while (strLen < strLength) {
                    StringBuffer sb = new StringBuffer();
                    // 左补0
                    sb.append("0").append(str);
                    // sb.append(str).append("0");//右补0
                    str = sb.toString();
                    strLen = str.length();
                }
            }
            return str;
        }