v1.2.27 修复立春比春节早时年九星的错误；新增阳历月中获取周。

src/main/java/com/nlf/calendar/Lunar.java

@@ -2049,13 +2049,16 @@ public class Lunar {
   }
 
   protected NineStar getYearNineStar(String yearInGanZhi) {
-    int index = LunarUtil.getJiaZiIndex(yearInGanZhi) + 1;
-    int yearOffset = 0;
-    if (index != LunarUtil.getJiaZiIndex(this.getYearInGanZhi()) + 1) {
-      yearOffset = -1;
+    int indexExact = LunarUtil.getJiaZiIndex(yearInGanZhi) + 1;
+    int index = LunarUtil.getJiaZiIndex(this.getYearInGanZhi()) + 1;
+    int yearOffset = indexExact - index;
+    if (yearOffset > 1) {
+      yearOffset -= 60;
+    } else if (yearOffset < -1) {
+      yearOffset += 60;
     }
     int yuan = ((this.year + yearOffset + 2696) / 60) % 3;
-    int offset = (62 + yuan * 3 - index) % 9;
+    int offset = (62 + yuan * 3 - indexExact) % 9;
     if (0 == offset) {
       offset = 9;
     }

src/main/java/com/nlf/calendar/SolarMonth.java

@@ -122,6 +122,26 @@ public class SolarMonth {
     return l;
   }
 
+  /**
+   * 获取本月的阳历周列表
+   * @param start 星期几作为一周的开始，1234560分别代表星期一至星期天
+   * @return 周列表
+   */
+  public List<SolarWeek> getWeeks(int start) {
+    List<SolarWeek> l = new ArrayList<SolarWeek>();
+    SolarWeek week = SolarWeek.fromYmd(year, month, 1, start);
+    Solar firstDay = week.getFirstDay();
+    while (true) {
+      l.add(week);
+      week = week.next(1, false);
+      firstDay = week.getFirstDay();
+      if (firstDay.getYear() > year || firstDay.getMonth() > month) {
+        break;
+      }
+    }
+    return l;
+  }
+
   /**
    * 获取往后推几个月的阳历月，如果要往前推，则月数用负数
    *