diff --git a/src/org/redkale/source/Range.java b/src/org/redkale/source/Range.java
index 02f3d490a..34b986586 100644
--- a/src/org/redkale/source/Range.java
+++ b/src/org/redkale/source/Range.java
@@ -9,7 +9,7 @@ import java.util.function.*;
 
 /**
  *
- *  包含两边的值
+ * 包含两边的值
  * <p>
  * 详情见: https://redkale.org
  *
@@ -22,6 +22,34 @@ public interface Range<E extends Comparable> extends java.io.Serializable, Predi
 
     public E getMax();
 
+    public static ByteRange crreate(byte min, byte max) {
+        return new ByteRange(min, max);
+    }
+
+    public static ShortRange crreate(short min, short max) {
+        return new ShortRange(min, max);
+    }
+
+    public static IntRange crreate(int min, int max) {
+        return new IntRange(min, max);
+    }
+
+    public static LongRange crreate(long min, long max) {
+        return new LongRange(min, max);
+    }
+
+    public static FloatRange crreate(float min, float max) {
+        return new FloatRange(min, max);
+    }
+
+    public static DoubleRange crreate(double min, double max) {
+        return new DoubleRange(min, max);
+    }
+
+    public static StringRange crreate(String min, String max) {
+        return new StringRange(min, max);
+    }
+
     public static final class ByteRange implements Range<Byte> {
 
         private Byte min = Byte.MIN_VALUE;
diff --git a/src/org/redkale/util/Utility.java b/src/org/redkale/util/Utility.java
index e8f55f2b3..bc6d57130 100644
--- a/src/org/redkale/util/Utility.java
+++ b/src/org/redkale/util/Utility.java
@@ -430,6 +430,21 @@ public final class Utility {
         return ld.atStartOfDay(zid).toInstant().toEpochMilli();
     }
 
+    /**
+     * 获取时间点所在月份的最后一天
+     *
+     * @param time 指定时间
+     *
+     * @return 毫秒数
+     */
+    public static long monthLastDay(long time) {
+        ZoneId zid = ZoneId.systemDefault();
+        Instant instant = Instant.ofEpochMilli(time);
+        LocalDate ld = instant.atZone(zid).toLocalDate();
+        ld = ld.withDayOfMonth(ld.lengthOfMonth());
+        return ld.atStartOfDay(zid).toInstant().toEpochMilli();
+    }
+
     /**
      * 将字节数组转换为16进制字符串
      *