获取本年本月本季度的开始时间以及去年上月上季度的开始和结束时间

忘是亡心i 2022-11-24 14:10 210阅读 0赞

直接上代码

private static final String TIME_OF_DAY_BEGIN = " 00:00:00";
    private static final String TIME_OF_DAY_END = " 23:59:59";
    private static final Calendar calendar = Calendar.getInstance();
    // 当前月所在季度
    private static final Map<Integer,Integer>  quarterMap = new TreeMap<Integer,Integer>(){
       {
            put(3,1);
            put(6,4);
            put(9,7);
            put(12,10);
        }};
    
    // 代码可优化，我没有时间优化
    // 获取年月季度开始时间  flag = flase 是去年上月上季度的开始时间 flag=true是当前对应的开始时间
    public static String getStartTimeByType(Integer dateType, boolean flag) {
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd" + TIME_OF_DAY_BEGIN);
            String date = null;
            switch (dateType) {
                case 2://月
                    if (flag) {
                        calendar.add(Calendar.MONTH, 0);
                    } else {
                        calendar.add(Calendar.MONTH, -1);
                    }
                    calendar.set(Calendar.DAY_OF_MONTH, 1);
                    date = format.format(calendar.getTime());
                    break;
                case 3:
                    //季
                    int month = calendar.get(Calendar.MONTH) + 1;
                    int type = 0;
                    Set<Integer> keySet = quarterMap.keySet();
                    for (Integer s : keySet) {
                        if (month <= s) {
                            s = flag ? s : s - 3;
                            type = quarterMap.get(s);
                            break;
                        }
                    }
                    calendar.add(Calendar.MONTH, type - month);
    
                    calendar.set(Calendar.DAY_OF_MONTH, 1);
                    date = format.format(calendar.getTime());
                    break;
                case 4:
                    //年
                    if (flag) {
                        calendar.add(Calendar.YEAR, 0);
                    } else {
                        calendar.add(Calendar.YEAR, -1);
                    }
                    calendar.add(Calendar.YEAR, 0);
                    calendar.set(Calendar.DAY_OF_YEAR, 1);
                    date = format.format(calendar.getTime());
                    break;
            }
            return date;
        }
    
        // 按照月季年获取结束时间
        public static String getEndTimeByType(Integer dateType) {
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd" + TIME_OF_DAY_END);
            Calendar calendar = Calendar.getInstance();
            String date = null;
            switch (dateType) {
                case 2://月
                    calendar.add(Calendar.MONTH, 0);
                    calendar.set(Calendar.DAY_OF_MONTH, calendar.getMaximum(Calendar.DATE));
                    date = format.format(calendar.getTime());
                    break;
                case 3: //季
                    int month = calendar.get(Calendar.MONTH) + 1;
                    int type = 0;
                    Set<Integer> keySet = quarterMap.keySet();
                    for (Integer s : keySet) {
                        if (month <= s) {
                            type = Constants.quarterMap.get(s);
                            break;
                        }
                    }
                    calendar.add(Calendar.MONTH, type - month);
                    calendar.set(Calendar.DAY_OF_MONTH, calendar.getMaximum(Calendar.DATE) - 1);
                    date = format.format(calendar.getTime());
                    break;
                case 4: //年
                    calendar.add(Calendar.YEAR, 0);
                    calendar.set(Calendar.DAY_OF_YEAR, 0);
                    date = format.format(calendar.getTime());
                    break;
            }
            return date;
        }