fix code

hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java

@@ -1294,8 +1294,8 @@ public class NumberUtil {
 			end = temp;
 		}
 		// 加入逻辑判断，确保begin<end并且size不能大于该表示范围
-		Assert.isTrue((end - begin) > size, "Size is larger than range between begin and end!");
-		Assert.isTrue(seed.length > size, "Size is larger than seed size!");
+		Assert.isTrue((end - begin) >= size, "Size is larger than range between begin and end!");
+		Assert.isTrue(seed.length >= size, "Size is larger than seed size!");
 
 		final int[] ranArr = new int[size];
 		// 数量你可以自己定义。

hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java

@@ -361,6 +361,7 @@ public class NumberUtilTest {
 
 	@Test
 	public void generateRandomNumberTest2(){
+		// 检查边界
 		final int[] ints = NumberUtil.generateRandomNumber(1, 8, 7);
 		Assert.assertEquals(7, ints.length);
 		final Set<?> set = Convert.convert(Set.class, ints);