diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6b86219e0..aa3b679ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@
 * 【core   】     MultipartRequestInputStream改为使用long以支持大文件（issue#I428AN@Gitee）
 * 【core   】     RobotUtl增加getDelay、getRobot方法（pr#1725@Github）
 * 【json   】     JSON输出支持ignoreNull（issue#1728@Github）
+* 【core   】     DateUtil和LocalDateTimeUtil增加isWeekend方法（issue#I42N5A@Gitee）
 
 ### 🐞Bug修复
 * 【core   】     修复RobotUtil双击右键问题（pr#1721@Github）
@@ -28,6 +29,7 @@
 * 【poi    】     修复BeanSheetReader.read中字段对象为空导致的报错（issue#1729@Github）
 * 【core   】     修复DateConverter转换java.sql.Date问题（issue#1729@Github）
 * 【extra  】     修复CompressUtil中部分方法非static的问题（pr#385@Gitee）
+* 【core   】     修复ByteUtil转换端序错误问题（pr#384@Gitee）
 
 -------------------------------------------------------------------------------------------------------------
 
diff --git a/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java b/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
index 06fa860bf..7cbe2f836 100644
--- a/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
@@ -281,6 +281,18 @@ public class DateUtil extends CalendarUtil {
 		return DateTime.of(date).dayOfWeekEnum();
 	}
 
+	/**
+	 * 是否为周末（周六或周日）
+	 *
+	 * @param date 判定的日期{@link Date}
+	 * @return 是否为周末（周六或周日）
+	 * @since 5.7.6
+	 */
+	public static boolean isWeekend(Date date) {
+		final Week week = dayOfWeekEnum(date);
+		return Week.SATURDAY == week || Week.SUNDAY == week;
+	}
+
 	/**
 	 * 获得指定日期的小时数部分<br>
 	 *
diff --git a/hutool-core/src/main/java/cn/hutool/core/date/LocalDateTimeUtil.java b/hutool-core/src/main/java/cn/hutool/core/date/LocalDateTimeUtil.java
index 66ffb40f5..5c8422fbd 100644
--- a/hutool-core/src/main/java/cn/hutool/core/date/LocalDateTimeUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/LocalDateTimeUtil.java
@@ -5,6 +5,7 @@ import cn.hutool.core.util.ObjectUtil;
 import cn.hutool.core.util.ReUtil;
 import cn.hutool.core.util.StrUtil;
 
+import java.time.DayOfWeek;
 import java.time.Duration;
 import java.time.Instant;
 import java.time.LocalDate;
@@ -486,4 +487,27 @@ public class LocalDateTimeUtil {
 	public static long toEpochMilli(TemporalAccessor temporalAccessor) {
 		return TemporalAccessorUtil.toEpochMilli(temporalAccessor);
 	}
+
+	/**
+	 * 是否为周末（周六或周日）
+	 *
+	 * @param localDateTime 判定的日期{@link LocalDateTime}
+	 * @return 是否为周末（周六或周日）
+	 * @since 5.7.6
+	 */
+	public static boolean isWeekend(LocalDateTime localDateTime){
+		return isWeekend(localDateTime.toLocalDate());
+	}
+
+	/**
+	 * 是否为周末（周六或周日）
+	 *
+	 * @param localDate 判定的日期{@link LocalDate}
+	 * @return 是否为周末（周六或周日）
+	 * @since 5.7.6
+	 */
+	public static boolean isWeekend(LocalDate localDate){
+		final DayOfWeek dayOfWeek = localDate.getDayOfWeek();
+		return DayOfWeek.SATURDAY == dayOfWeek || DayOfWeek.SUNDAY == dayOfWeek;
+	}
 }
diff --git a/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
index 0ea1d0f9b..39d95cf71 100644
--- a/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
@@ -915,4 +915,15 @@ public class DateUtilTest {
 				"yyyy-MM-dd HH:mm:ss");
 		Assert.assertEquals("2021-07-14 10:05:38", format);
 	}
+
+	@Test
+	public void isWeekendTest(){
+		DateTime parse = DateUtil.parse("2021-07-28");
+		Assert.assertFalse(DateUtil.isWeekend(parse));
+
+		parse = DateUtil.parse("2021-07-25");
+		Assert.assertTrue(DateUtil.isWeekend(parse));
+		parse = DateUtil.parse("2021-07-24");
+		Assert.assertTrue(DateUtil.isWeekend(parse));
+	}
 }
diff --git a/hutool-core/src/test/java/cn/hutool/core/util/ByteUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/util/ByteUtilTest.java
index a8bd49721..b1cf436e5 100644
--- a/hutool-core/src/test/java/cn/hutool/core/util/ByteUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/util/ByteUtilTest.java
@@ -3,6 +3,7 @@ package cn.hutool.core.util;
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 
 public class ByteUtilTest {
@@ -89,4 +90,47 @@ public class ByteUtilTest {
 
 		Assert.assertEquals(short2, short1);
 	}
+
+	@Test
+	public void bytesToLongTest(){
+		long a = RandomUtil.randomLong(0, Long.MAX_VALUE);
+		ByteBuffer wrap = ByteBuffer.wrap(ByteUtil.longToBytes(a));
+		wrap.order(ByteOrder.LITTLE_ENDIAN);
+		long aLong = wrap.getLong();
+		Assert.assertEquals(a, aLong);
+
+		wrap = ByteBuffer.wrap(ByteUtil.longToBytes(a, ByteOrder.BIG_ENDIAN));
+		wrap.order(ByteOrder.BIG_ENDIAN);
+		aLong = wrap.getLong();
+		Assert.assertEquals(a, aLong);
+	}
+
+	@Test
+	public void bytesToIntTest(){
+		int a = RandomUtil.randomInt(0, Integer.MAX_VALUE);
+		ByteBuffer wrap = ByteBuffer.wrap(ByteUtil.intToBytes(a));
+		wrap.order(ByteOrder.LITTLE_ENDIAN);
+		int aInt = wrap.getInt();
+		Assert.assertEquals(a, aInt);
+
+		wrap = ByteBuffer.wrap(ByteUtil.intToBytes(a, ByteOrder.BIG_ENDIAN));
+		wrap.order(ByteOrder.BIG_ENDIAN);
+		aInt = wrap.getInt();
+		Assert.assertEquals(a, aInt);
+	}
+
+	@Test
+	public void bytesToShortTest(){
+		short a = (short) RandomUtil.randomInt(0, Short.MAX_VALUE);
+
+		ByteBuffer wrap = ByteBuffer.wrap(ByteUtil.shortToBytes(a));
+		wrap.order(ByteOrder.LITTLE_ENDIAN);
+		short aShort = wrap.getShort();
+		Assert.assertEquals(a, aShort);
+
+		wrap = ByteBuffer.wrap(ByteUtil.shortToBytes(a, ByteOrder.BIG_ENDIAN));
+		wrap.order(ByteOrder.BIG_ENDIAN);
+		aShort = wrap.getShort();
+		Assert.assertEquals(a, aShort);
+	}
 }