diff --git a/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java b/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java
index a99961183..685fbd959 100755
--- a/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java
@@ -227,15 +227,20 @@ public class CollUtil {
 	}
 
 	/**
-	 * 是否包含{@code null}元素
+	 * 是否包含{@code null}元素<br>
+	 * <ul>
+	 *     <list>集合为{@code null}，返回{@code true}</list>
+	 *     <list>集合为空集合，即元素个数为0，返回{@code false}</list>
+	 *     <list>集合中元素为""，返回{@code false}</list>
+	 * </ul>
 	 *
 	 * @param iterable 被检查的Iterable对象，如果为{@code null} 返回true
 	 * @return 是否包含{@code null}元素
-	 * @see IterUtil#hasNull(Iterable)
+	 * @see IterUtil#hasNull(Iterator)
 	 * @since 3.0.7
 	 */
 	public static boolean hasNull(final Iterable<?> iterable) {
-		return IterUtil.hasNull(iterable);
+		return IterUtil.hasNull(IterUtil.getIter(iterable));
 	}
 
 	/**
@@ -1359,6 +1364,10 @@ public class CollUtil {
 	 * @return 第一个元素，为空返回{@code null}
 	 */
 	public static <T> T getFirst(final Iterable<T> iterable) {
+		if (iterable instanceof List) {
+			final List<T> list = (List<T>) iterable;
+			return CollUtil.isEmpty(list) ? null: list.get(0);
+		}
 		return IterUtil.getFirst(IterUtil.getIter(iterable));
 	}
 
diff --git a/hutool-core/src/main/java/cn/hutool/core/collection/iter/IterUtil.java b/hutool-core/src/main/java/cn/hutool/core/collection/iter/IterUtil.java
index 214b15063..5b018d640 100644
--- a/hutool-core/src/main/java/cn/hutool/core/collection/iter/IterUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/collection/iter/IterUtil.java
@@ -87,17 +87,12 @@ public class IterUtil {
 	}
 
 	/**
-	 * 是否包含{@code null}元素
-	 *
-	 * @param iter 被检查的{@link Iterable}对象，如果为{@code null} 返回true
-	 * @return 是否包含{@code null}元素
-	 */
-	public static boolean hasNull(final Iterable<?> iter) {
-		return hasNull(null == iter ? null : iter.iterator());
-	}
-
-	/**
-	 * 是否包含{@code null}元素
+	 * 是否包含{@code null}元素<br>
+	 * <ul>
+	 *     <list>Iterator为{@code null}，返回{@code true}</list>
+	 *     <list>Iterator为空集合，即元素个数为0，返回{@code false}</list>
+	 *     <list>Iterator中元素为""，返回{@code false}</list>
+	 * </ul>
 	 *
 	 * @param iter 被检查的{@link Iterator}对象，如果为{@code null} 返回true
 	 * @return 是否包含{@code null}元素
diff --git a/hutool-core/src/main/java/cn/hutool/core/date/format/parser/UTCDateParser.java b/hutool-core/src/main/java/cn/hutool/core/date/format/parser/UTCDateParser.java
index 9403c858a..c14812701 100644
--- a/hutool-core/src/main/java/cn/hutool/core/date/format/parser/UTCDateParser.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/format/parser/UTCDateParser.java
@@ -64,6 +64,9 @@ public class UTCDateParser extends DefaultDateBasic implements DateParser {
 			if (length == DatePattern.UTC_SIMPLE_PATTERN.length() - 2) {
 				// 格式类似：2018-09-13T05:34:31
 				return new DateTime(source, DatePattern.UTC_SIMPLE_FORMAT);
+			} else if (length == DatePattern.UTC_SIMPLE_PATTERN.length() - 5) {
+				// 格式类似：2018-09-13T05:34
+				return new DateTime(source + ":00", DatePattern.UTC_SIMPLE_FORMAT);
 			} else if (StrUtil.contains(source, CharUtil.DOT)) {
 				// 可能为：  2021-03-17T06:31:33.99
 				return new DateTime(source, DatePattern.UTC_SIMPLE_MS_FORMAT);
diff --git a/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java b/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java
index 923058e4c..ca075472f 100644
--- a/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java
@@ -267,7 +267,7 @@ public class NumberUtil {
 	}
 
 	/**
-	 * 补充Math.ceilDiv() JDK8中添加了和Math.floorDiv()但却没有ceilDiv()
+	 * 补充Math.ceilDiv() JDK8中添加了和 {@link Math#floorDiv(int, int)} 但却没有ceilDiv()
 	 *
 	 * @param v1 被除数
 	 * @param v2 除数
@@ -1448,6 +1448,7 @@ public class NumberUtil {
 	 * 4、空串返回0
 	 * 5、.123形式返回0（按照小于0的小数对待）
 	 * 6、123.56截取小数点之前的数字，忽略小数部分
+	 * 7、科学计数法抛出NumberFormatException异常
 	 * </pre>
 	 *
 	 * @param number 数字，支持0x开头、0开头和普通十进制
@@ -1460,6 +1461,11 @@ public class NumberUtil {
 			return 0;
 		}
 
+		if(StrUtil.containsIgnoreCase(number, "E")){
+			// 科学计数法忽略支持，科学计数法一般用于表示非常小和非常大的数字，这类数字转换为int后精度丢失，没有意义。
+			throw new NumberFormatException(StrUtil.format("Unsupported int format: [{}]", number));
+		}
+
 		if (StrUtil.startWithIgnoreCase(number, "0x")) {
 			// 0x04表示16进制数
 			return Integer.parseInt(number.substring(2), 16);
diff --git a/hutool-core/src/test/java/cn/hutool/core/collection/CollUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/collection/CollUtilTest.java
index a55948404..69131a156 100755
--- a/hutool-core/src/test/java/cn/hutool/core/collection/CollUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/collection/CollUtilTest.java
@@ -15,6 +15,7 @@ import lombok.ToString;
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -39,6 +40,34 @@ import java.util.function.Function;
  */
 public class CollUtilTest {
 
+	@SuppressWarnings("ConstantConditions")
+	@Test
+	public void emptyIfNullTest() {
+		final Set<?> set = null;
+		final Set<?> set1 = CollUtil.emptyIfNull(set);
+		Assert.assertEquals(SetUtil.empty(), set1);
+
+		final List<?> list = null;
+		final List<?> list1 = CollUtil.emptyIfNull(list);
+		Assert.assertEquals(ListUtil.empty(), list1);
+	}
+
+	@SuppressWarnings("ConstantConditions")
+	@Test
+	public void hasNullTest() {
+		ArrayList<Object> list = null;
+		Assert.assertTrue(CollUtil.hasNull(list));
+
+		list = ListUtil.of();
+		Assert.assertFalse(CollUtil.hasNull(list));
+
+		list = ListUtil.of("");
+		Assert.assertFalse(CollUtil.hasNull(list));
+
+		list = ListUtil.of("", null);
+		Assert.assertTrue(CollUtil.hasNull(list));
+	}
+
 	@Test
 	public void defaultIfEmpty() {
 		ArrayList<String> strings = CollUtil.defaultIfEmpty(ListUtil.of(), ListUtil.of("1"));
@@ -50,7 +79,7 @@ public class CollUtilTest {
 
 	@Test
 	public void defaultIfEmpty2() {
-		ArrayList<String> strings = CollUtil.defaultIfEmpty(ListUtil.of(), Function.identity(), () -> ListUtil.of("1"));
+		final ArrayList<String> strings = CollUtil.defaultIfEmpty(ListUtil.of(), Function.identity(), () -> ListUtil.of("1"));
 		Assert.assertEquals(ListUtil.of("1"), strings);
 	}
 
@@ -322,7 +351,7 @@ public class CollUtilTest {
 
 		final List<String> removed = new ArrayList<>();
 		final ArrayList<String> filtered = CollUtil.remove(list, t -> {
-			if("a".equals(t)){
+			if ("a".equals(t)) {
 				removed.add(t);
 				return true;
 			}
@@ -484,8 +513,8 @@ public class CollUtilTest {
 
 	@Test
 	public void listTest2() {
-		final List<String> list1 = ListUtil.of( "a", "b", "c");
-		final List<String> list2 = ListUtil.ofLinked( "a", "b", "c");
+		final List<String> list1 = ListUtil.of("a", "b", "c");
+		final List<String> list2 = ListUtil.ofLinked("a", "b", "c");
 		Assert.assertEquals("[a, b, c]", list1.toString());
 		Assert.assertEquals("[a, b, c]", list2.toString());
 	}
@@ -749,7 +778,7 @@ public class CollUtilTest {
 	}
 
 	@Test
-	public void mapToMapTest(){
+	public void mapToMapTest() {
 		final HashMap<String, String> oldMap = new HashMap<>();
 		oldMap.put("a", "1");
 		oldMap.put("b", "12");
@@ -759,9 +788,9 @@ public class CollUtilTest {
 				Map.Entry::getKey,
 				entry -> Long.parseLong(entry.getValue()));
 
-		Assert.assertEquals(1L, (long)map.get("a"));
-		Assert.assertEquals(12L, (long)map.get("b"));
-		Assert.assertEquals(134L, (long)map.get("c"));
+		Assert.assertEquals(1L, (long) map.get("a"));
+		Assert.assertEquals(12L, (long) map.get("b"));
+		Assert.assertEquals(134L, (long) map.get("c"));
 	}
 
 	@Test
@@ -826,7 +855,7 @@ public class CollUtilTest {
 	}
 
 	@Test
-	public void setValueByMapTest(){
+	public void setValueByMapTest() {
 		// https://gitee.com/dromara/hutool/pulls/482
 		final List<Person> people = Arrays.asList(
 				new Person("aa", 12, "man", 1),
@@ -867,13 +896,13 @@ public class CollUtilTest {
 	}
 
 	@Test
-	public void distinctTest(){
+	public void distinctTest() {
 		final ArrayList<Integer> distinct = CollUtil.distinct(ListUtil.view(5, 3, 10, 9, 0, 5, 10, 9));
 		Assert.assertEquals(ListUtil.view(5, 3, 10, 9, 0), distinct);
 	}
 
 	@Test
-	public void distinctByFunctionTest(){
+	public void distinctByFunctionTest() {
 		final List<Person> people = Arrays.asList(
 				new Person("aa", 12, "man", 1),
 				new Person("bb", 13, "woman", 2),
@@ -906,14 +935,14 @@ public class CollUtilTest {
 	}
 
 	@Test
-	public void mapTest(){
+	public void mapTest() {
 		final ArrayList<String> list = ListUtil.of("a", "b", "c");
 		final List<Object> extract = CollUtil.map(list, (e) -> e + "_1");
-		Assert.assertEquals(ListUtil.of("a_1",  "b_1", "c_1"), extract);
+		Assert.assertEquals(ListUtil.of("a_1", "b_1", "c_1"), extract);
 	}
 
 	@Test
-	public void mapBeanTest(){
+	public void mapBeanTest() {
 		final List<Person> people = Arrays.asList(
 				new Person("aa", 12, "man", 1),
 				new Person("bb", 13, "woman", 2),
@@ -926,14 +955,14 @@ public class CollUtilTest {
 	}
 
 	@Test
-	public void createTest(){
+	public void createTest() {
 		final Collection<Object> collection = CollUtil.create(Collections.emptyList().getClass());
 		Console.log(collection.getClass());
 		Assert.assertNotNull(collection);
 	}
 
 	@Test
-	public void transTest(){
+	public void transTest() {
 		final List<Person> people = Arrays.asList(
 				new Person("aa", 12, "man", 1),
 				new Person("bb", 13, "woman", 2),
@@ -945,6 +974,7 @@ public class CollUtilTest {
 		Assert.assertEquals("[aa, bb, cc, dd]", trans.toString());
 	}
 
+	@SuppressWarnings("ConstantConditions")
 	@Test
 	public void unionNullTest() {
 		final List<String> list1 = new ArrayList<>();
@@ -954,6 +984,7 @@ public class CollUtilTest {
 		Assert.assertNotNull(union);
 	}
 
+	@SuppressWarnings("ConstantConditions")
 	@Test
 	public void unionDistinctNullTest() {
 		final List<String> list1 = new ArrayList<>();
@@ -963,6 +994,7 @@ public class CollUtilTest {
 		Assert.assertNotNull(set);
 	}
 
+	@SuppressWarnings("ConstantConditions")
 	@Test
 	public void unionAllNullTest() {
 		final List<String> list1 = new ArrayList<>();
@@ -972,6 +1004,7 @@ public class CollUtilTest {
 		Assert.assertNotNull(list);
 	}
 
+	@SuppressWarnings("ConstantConditions")
 	@Test
 	public void intersectionNullTest() {
 		final List<String> list1 = new ArrayList<>();
@@ -983,6 +1016,7 @@ public class CollUtilTest {
 		Assert.assertNotNull(collection);
 	}
 
+	@SuppressWarnings("ConstantConditions")
 	@Test
 	public void intersectionDistinctNullTest() {
 		final List<String> list1 = new ArrayList<>();
@@ -1024,8 +1058,20 @@ public class CollUtilTest {
 	@EqualsAndHashCode(callSuper = true)
 	@Data
 	static class Dog extends Animal {
-		public Dog(String name, Integer age) {
+		public Dog(final String name, final Integer age) {
 			super(name, age);
 		}
 	}
+
+	@Test
+	public void getFirstTest() {
+		Assert.assertNull(CollUtil.getFirst(null));
+		Assert.assertNull(CollUtil.getFirst(ListUtil.of()));
+
+		Assert.assertEquals("1", CollUtil.getFirst(ListUtil.of("1", "2", "3")));
+		final ArrayDeque<String> deque = new ArrayDeque<>();
+		deque.add("3");
+		deque.add("4");
+		Assert.assertEquals("3", CollUtil.getFirst(deque));
+	}
 }
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 752afc2e9..c0a118bee 100755
--- a/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
@@ -682,6 +682,15 @@ public class DateUtilTest {
 		Assert.assertEquals("2021-03-30 12:56:51", Objects.requireNonNull(parse).toString());
 	}
 
+	@Test
+	public void parseUTCTest3() {
+		// issue#I5M6DP
+		final String dateStr = "2022-08-13T09:30";
+		final DateTime dateTime = DateUtil.parse(dateStr);
+		Assert.assertNotNull(dateTime);
+		Assert.assertEquals("2022-08-13 09:30:00", dateTime.toString());
+	}
+
 	@Test
 	public void parseCSTTest() {
 		final String dateStr = "Wed Sep 16 11:26:23 CST 2009";
diff --git a/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
index 16bffe9bc..75813a52a 100644
--- a/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
@@ -12,7 +12,6 @@ import java.math.RoundingMode;
  * {@link NumberUtil} 单元测试类
  *
  * @author Looly
- *
  */
 public class NumberUtilTest {
 
@@ -50,7 +49,7 @@ public class NumberUtilTest {
 	}
 
 	@Test
-	public void addBlankTest(){
+	public void addBlankTest() {
 		final BigDecimal result = NumberUtil.add("123", " ");
 		Assert.assertEquals(new BigDecimal("123"), result);
 	}
@@ -74,7 +73,7 @@ public class NumberUtilTest {
 	}
 
 	@Test
-	public void mulNullTest(){
+	public void mulNullTest() {
 		final BigDecimal mul = NumberUtil.mul(new BigDecimal("10"), null);
 		Assert.assertEquals(BigDecimal.ZERO, mul);
 	}
@@ -206,7 +205,7 @@ public class NumberUtilTest {
 	}
 
 	@Test(expected = IllegalArgumentException.class)
-	public void decimalFormatNaNTest(){
+	public void decimalFormatNaNTest() {
 		final Double a = 0D;
 		final Double b = 0D;
 
@@ -215,7 +214,7 @@ public class NumberUtilTest {
 	}
 
 	@Test(expected = IllegalArgumentException.class)
-	public void decimalFormatNaNTest2(){
+	public void decimalFormatNaNTest2() {
 		final Double a = 0D;
 		final Double b = 0D;
 
@@ -300,6 +299,20 @@ public class NumberUtilTest {
 		Assert.assertEquals(1482, v1);
 	}
 
+	@Test(expected = NumberFormatException.class)
+	public void parseIntTest3() {
+		final int v1 = NumberUtil.parseInt("d");
+		Assert.assertEquals(0, v1);
+	}
+
+	@Test(expected = NumberFormatException.class)
+	public void parseIntTest4() {
+		// issue#I5M55F
+		// 科学计数法忽略支持，科学计数法一般用于表示非常小和非常大的数字，这类数字转换为int后精度丢失，没有意义。
+		final String numberStr = "429900013E20220812163344551";
+		NumberUtil.parseInt(numberStr);
+	}
+
 	@Test
 	public void parseNumberTest() {
 		// from 5.4.8 issue#I23ORQ@Gitee
@@ -311,6 +324,15 @@ public class NumberUtilTest {
 		Assert.assertEquals(1482L, v2.longValue());
 	}
 
+	@Test
+	public void parseNumberTest2() {
+		// issue#I5M55F
+		final String numberStr = "429900013E20220812163344551";
+		final Number number = NumberUtil.parseNumber(numberStr);
+		Assert.assertNotNull(number);
+		Assert.assertTrue(number instanceof BigDecimal);
+	}
+
 	@Test
 	public void parseHexNumberTest() {
 		// 千位分隔符去掉
@@ -359,7 +381,7 @@ public class NumberUtilTest {
 	}
 
 	@Test
-	public void toStrTest(){
+	public void toStrTest() {
 		Assert.assertEquals("1", NumberUtil.toStr(new BigDecimal("1.0000000000")));
 		Assert.assertEquals("0", NumberUtil.toStr(NumberUtil.sub(new BigDecimal("9600.00000"), new BigDecimal("9600.00000"))));
 		Assert.assertEquals("0", NumberUtil.toStr(NumberUtil.sub(new BigDecimal("9600.0000000000"), new BigDecimal("9600.000000"))));
@@ -367,15 +389,15 @@ public class NumberUtilTest {
 	}
 
 	@Test
-	public void toPlainNumberTest(){
+	public void toPlainNumberTest() {
 		final String num = "5344.34234e3";
 		final String s = new BigDecimal(num).toPlainString();
 		Assert.assertEquals("5344342.34", s);
 	}
 
 	@Test
-	public void isOddOrEvenTest(){
-		final int[] a = { 0, 32, -32, 123, -123 };
+	public void isOddOrEvenTest() {
+		final int[] a = {0, 32, -32, 123, -123};
 		Assert.assertFalse(NumberUtil.isOdd(a[0]));
 		Assert.assertTrue(NumberUtil.isEven(a[0]));
 
@@ -393,21 +415,21 @@ public class NumberUtilTest {
 	}
 
 	@Test
-	public void toBigIntegerTest(){
-		final Number number=1123123;
-		final Number number2=1123123.123;
+	public void toBigIntegerTest() {
+		final Number number = 1123123;
+		final Number number2 = 1123123.123;
 		Assert.assertNotNull(NumberUtil.toBigInteger(number));
 		Assert.assertNotNull(NumberUtil.toBigInteger(number2));
 	}
 
 	@Test
-	public void divIntegerTest(){
+	public void divIntegerTest() {
 		final BigDecimal div = NumberUtil.div(100101300, 100);
 		Assert.assertEquals(1001013, div.intValue());
 	}
 
 	@Test
-	public void isDoubleTest(){
+	public void isDoubleTest() {
 		Assert.assertFalse(NumberUtil.isDouble(null));
 		Assert.assertFalse(NumberUtil.isDouble(""));
 		Assert.assertFalse(NumberUtil.isDouble("  "));
@@ -434,10 +456,4 @@ public class NumberUtilTest {
 		//noinspection ResultOfMethodCallIgnored
 		NumberUtil.range(0, Integer.MIN_VALUE);
 	}
-
-	@Test(expected = NumberFormatException.class)
-	public void parseIntTest3() {
-		int v1 = NumberUtil.parseInt("d");
-		Assert.assertEquals(0, v1);
-	}
 }