添加常量

src/main/java/com/unissoft/constant/GrainConstant.java

@@ -38,6 +38,7 @@ public class GrainConstant {
     public static final String STR_MINUTE = "minute";
     public static final String STR_HOUR = "hour";
     public static final String STR_DAY = "day";
+    public static final String STR_WEEKDAY = "weekday";
     public static final String STR_WEEK = "week";
     public static final String STR_MONTH = "month";
     public static final String STR_SEASON = "season";