Method getDayNineStar

src/main/java/com/nlf/calendar/Lunar.java:2147–2187

获取值日九星（日家紫白星歌诀：日家白法不难求，二十四气六宫周；冬至雨水及谷雨，阳顺一七四中游；夏至处暑霜降后，九三六星逆行求。） @return 九星

()

   * @return 九星
   */
  public NineStar getDayNineStar() {
    String solarYmd = solar.toYmd();
    Solar dongZhi = jieQi.get("冬至");
    Solar dongZhi2 = jieQi.get("DONG_ZHI");
    Solar xiaZhi = jieQi.get("夏至");
    int dongZhiIndex = LunarUtil.getJiaZiIndex(dongZhi.getLunar().getDayInGanZhi());
    int dongZhiIndex2 = LunarUtil.getJiaZiIndex(dongZhi2.getLunar().getDayInGanZhi());
    int xiaZhiIndex = LunarUtil.getJiaZiIndex(xiaZhi.getLunar().getDayInGanZhi());
    Solar solarShunBai;
    Solar solarShunBai2;
    Solar solarNiZi;
    if (dongZhiIndex > 29) {
      solarShunBai = dongZhi.next(60 - dongZhiIndex);
    } else {
      solarShunBai = dongZhi.next(-dongZhiIndex);
    }
    String solarShunBaiYmd = solarShunBai.toYmd();
    if (dongZhiIndex2 > 29) {
      solarShunBai2 = dongZhi2.next(60 - dongZhiIndex2);
    } else {
      solarShunBai2 = dongZhi2.next(-dongZhiIndex2);
    }
    String solarShunBaiYmd2 = solarShunBai2.toYmd();
    if (xiaZhiIndex > 29) {
      solarNiZi = xiaZhi.next(60 - xiaZhiIndex);
    } else {
      solarNiZi = xiaZhi.next(-xiaZhiIndex);
    }
    String solarNiZiYmd = solarNiZi.toYmd();
    int offset = 0;
    if (solarYmd.compareTo(solarShunBaiYmd) >= 0 && solarYmd.compareTo(solarNiZiYmd) < 0) {
      offset = solar.subtract(solarShunBai) % 9;
    } else if (solarYmd.compareTo(solarNiZiYmd) >= 0 && solarYmd.compareTo(solarShunBaiYmd2) < 0) {
      offset = 8 - (solar.subtract(solarNiZi) % 9);
    } else if (solarYmd.compareTo(solarShunBaiYmd2) >= 0) {
      offset = solar.subtract(solarShunBai2) % 9;
    } else if (solarYmd.compareTo(solarShunBaiYmd) < 0) {
      offset = (8 + solarShunBai.subtract(solar)) % 9;
    }
    return NineStar.fromIndex(offset);
  }

  /**
   * 获取值时九星（时家紫白星歌诀：三元时白最为佳，冬至阳生顺莫差，孟日七宫仲一白，季日四绿发萌芽，每把时辰起甲子，本时星耀照光华，时星移入中宫去，顺飞八方逐细查。夏至阴生逆回首，孟归三碧季加六，仲在九宫时起甲，依然掌中逆轮跨。）