[游戏开发]JAVA 返回今天、本周、本月、本季度、本年、上个月、上一年、昨天、明天、上周、下周

/**
     * @param type 1今天，2本周，3本月，4本季度，5本年，7上个月，8上一年，9昨天，10明天，11上周，12下周
     * @return
     */
    public static Map<String, String> getSpecialDate(String type) {
        Calendar calendar = Calendar.getInstance();
        Map<String, String> resultMap = new HashMap<>();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        if ("12".equals(type)) {
            //下周
            calendar.setFirstDayOfWeek(Calendar.MONDAY);//设置周一为一周之内的第一天
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
            calendar.add(Calendar.DATE, 7);//+7天
            String monday = dateFormat.format(calendar.getTime());//周一
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
            String sunday = dateFormat.format(calendar.getTime());//周日
            resultMap.put("date1", monday);
            resultMap.put("date2", sunday);
            return resultMap;
        }

        if ("11".equals(type)) {
            //上周
            calendar.setFirstDayOfWeek(Calendar.MONDAY);//设置周一为一周之内的第一天
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
            calendar.add(Calendar.DATE, -7);//-7天
            String monday = dateFormat.format(calendar.getTime());//周一
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
            String sunday = dateFormat.format(calendar.getTime());//周日
            resultMap.put("date1", monday);
            resultMap.put("date2", sunday);
            return resultMap;
        }

        if ("10".equals(type)) {
            //明天
            calendar.add(Calendar.DATE, 1);//+1日
            String begin = dateFormat.format(calendar.getTime());//yyyy-01-01
            resultMap.put("date1", begin);
            return resultMap;
        }

        if ("9".equals(type)) {
            //昨天
            calendar.add(Calendar.DATE, -1);//-1日
            String begin = dateFormat.format(calendar.getTime());//yyyy-01-01
            resultMap.put("date1", begin);
            return resultMap;
        }

        if ("8".equals(type)) {
            //上一年
            calendar.add(Calendar.YEAR, -1);//往前1年
            calendar.set(Calendar.MONTH, 0);//1月
            calendar.set(Calendar.DATE, 1);//1日
            String begin = dateFormat.format(calendar.getTime());//yyyy-01-01
            calendar.set(Calendar.MONTH, 11);//12月
            calendar.set(Calendar.DATE, 31);//31日
            String end = dateFormat.format(calendar.getTime());
            resultMap.put("date1", begin);
            resultMap.put("date2", end);
            return resultMap;
        }

        if ("7".equals(type)) {
            //上个月
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.add(Calendar.MONTH, -1);
            calendar.set(Calendar.DAY_OF_MONTH, 1);
            String firstDayOfMonth = dateFormat.format(calendar.getTime());
            calendar.add(Calendar.MONTH, 1);
            calendar.set(Calendar.DAY_OF_MONTH, 0);
            String lastDayOfMonth = dateFormat.format(calendar.getTime());

            resultMap.put("date1", firstDayOfMonth);
            resultMap.put("date2", lastDayOfMonth);
            return resultMap;
        }

        if ("5".equals(type)) {
            //本年
            calendar.set(Calendar.MONTH, 0);//1月
            calendar.set(Calendar.DATE, 1);//1日
            String begin = dateFormat.format(calendar.getTime());//yyyy-01-01
            calendar.set(Calendar.MONTH, 11);//12月
            calendar.set(Calendar.DATE, 31);//31日
            String end = dateFormat.format(calendar.getTime());
            resultMap.put("date1", begin);
            resultMap.put("date2", end);
            return resultMap;
        }

        if ("4".equals(type)) {
            //本季度
            int currentMonth = calendar.get(Calendar.MONTH) + 1;
            if (currentMonth >= 1 && currentMonth <= 3)
                calendar.set(Calendar.MONTH, 0);
            else if (currentMonth >= 4 && currentMonth <= 6)
                calendar.set(Calendar.MONTH, 3);
            else if (currentMonth >= 7 && currentMonth <= 9)
                calendar.set(Calendar.MONTH, 4);
            else if (currentMonth >= 10 && currentMonth <= 12)
                calendar.set(Calendar.MONTH, 9);
            calendar.set(Calendar.DATE, 1);
            String begin = dateFormat.format(calendar.getTime());
            calendar.add(Calendar.MONTH, 3);//月份+3
            calendar.add(Calendar.DATE, -1);//天数-1
            String end = dateFormat.format(calendar.getTime());
            resultMap.put("date1", begin);
            resultMap.put("date2", end);
            return resultMap;
        }
        if ("3".equals(type)) {
            //本月
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.add(Calendar.MONTH, 0);
            calendar.set(Calendar.DAY_OF_MONTH, 1);
            String firstDayOfMonth = dateFormat.format(calendar.getTime());
            calendar.add(Calendar.MONTH, 1);
            calendar.set(Calendar.DAY_OF_MONTH, 0);
            String lastDayOfMonth = dateFormat.format(calendar.getTime());

            resultMap.put("date1", firstDayOfMonth);
            resultMap.put("date2", lastDayOfMonth);
            return resultMap;
        }
        if ("2".equals(type)) {
            //本周
            calendar.setFirstDayOfWeek(Calendar.MONDAY);//设置周一为一周之内的第一天
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
            String monday = dateFormat.format(calendar.getTime());//周一
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
            String sunday = dateFormat.format(calendar.getTime());//周日

            resultMap.put("date1", monday);
            resultMap.put("date2", sunday);
            return resultMap;
        }
        if ("1".equals(type)) {
            //当天
            calendar.setTimeInMillis(System.currentTimeMillis());
            resultMap.put("date1", dateFormat.format(calendar.getTime()));
            return resultMap;
        }


        return null;
    }

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