diff --git a/hutool-bloomFilter/src/main/java/cn/hutool/bloomfilter/BitSetBloomFilter.java b/hutool-bloomFilter/src/main/java/cn/hutool/bloomfilter/BitSetBloomFilter.java
index 76a10bfdf..044edd16b 100644
--- a/hutool-bloomFilter/src/main/java/cn/hutool/bloomfilter/BitSetBloomFilter.java
+++ b/hutool-bloomFilter/src/main/java/cn/hutool/bloomfilter/BitSetBloomFilter.java
@@ -66,8 +66,8 @@ public class BitSetBloomFilter implements BloomFilter{
 		}
 
 		int[] positions = createHashes(str, hashFunctionNumber);
-		for (int i = 0; i < positions.length; i++) {
-			int position = Math.abs(positions[i] % bitSetSize);
+		for (int value : positions) {
+			int position = Math.abs(value % bitSetSize);
 			bitSet.set(position, true);
 		}
 		return true;
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 9df7e0919..e3110bd4b 100644
--- a/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/collection/CollUtil.java
@@ -1,13 +1,5 @@
 package cn.hutool.core.collection;
 
-import java.lang.reflect.Type;
-import java.util.*;
-import java.util.Map.Entry;
-import java.util.concurrent.ArrayBlockingQueue;
-import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.CopyOnWriteArrayList;
-import java.util.concurrent.LinkedBlockingDeque;
-
 import cn.hutool.core.bean.BeanUtil;
 import cn.hutool.core.comparator.PinyinComparator;
 import cn.hutool.core.comparator.PropertyComparator;
@@ -27,6 +19,35 @@ import cn.hutool.core.util.ReflectUtil;
 import cn.hutool.core.util.StrUtil;
 import cn.hutool.core.util.TypeUtil;
 
+import java.lang.reflect.Type;
+import java.util.AbstractCollection;
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Deque;
+import java.util.EnumSet;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Objects;
+import java.util.Set;
+import java.util.Stack;
+import java.util.TreeMap;
+import java.util.TreeSet;
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.LinkedBlockingDeque;
+
 /**
  * 集合相关工具类
  * <p>
diff --git a/hutool-core/src/main/java/cn/hutool/core/convert/Convert.java b/hutool-core/src/main/java/cn/hutool/core/convert/Convert.java
index bfc050665..d4770dda7 100644
--- a/hutool-core/src/main/java/cn/hutool/core/convert/Convert.java
+++ b/hutool-core/src/main/java/cn/hutool/core/convert/Convert.java
@@ -521,6 +521,7 @@ public class Convert {
 	 * @param defaultValue 默认值
 	 * @return Enum
 	 */
+	@SuppressWarnings("unchecked")
 	public static <E extends Enum<E>> E toEnum(Class<E> clazz, Object value, E defaultValue) {
 		return (E) (new EnumConverter(clazz)).convertQuietly(value, defaultValue);
 	}
diff --git a/hutool-crypto/src/test/java/cn/hutool/crypto/test/DesTest.java b/hutool-crypto/src/test/java/cn/hutool/crypto/test/DesTest.java
index f260e6912..649c35d2c 100644
--- a/hutool-crypto/src/test/java/cn/hutool/crypto/test/DesTest.java
+++ b/hutool-crypto/src/test/java/cn/hutool/crypto/test/DesTest.java
@@ -8,6 +8,9 @@ import cn.hutool.crypto.symmetric.DES;
 import org.junit.Assert;
 import org.junit.Test;
 
+/**
+ * DES加密解密单元测试
+ */
 public class DesTest {
 
 	@Test
diff --git a/hutool-json/src/test/java/cn/hutool/json/IssueI1AU86Test.java b/hutool-json/src/test/java/cn/hutool/json/IssueI1AU86Test.java
new file mode 100644
index 000000000..6f4855650
--- /dev/null
+++ b/hutool-json/src/test/java/cn/hutool/json/IssueI1AU86Test.java
@@ -0,0 +1,48 @@
+package cn.hutool.json;
+
+import cn.hutool.core.collection.CollUtil;
+import lombok.Data;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.Serializable;
+import java.util.Date;
+import java.util.List;
+
+/**
+ * 问题反馈解析为null<br>
+ * 此问题出在用户定义了String类型的List，parseArray时，Hutool无法知道这个String是普通值还是JSON字符串<br>
+ * 就算知道也不能盲目解析，否则可能违背用户的初衷。<br>
+ * 因此遇到List中的元素是String的情况下，用户需手动单独parse。
+ */
+public class IssueI1AU86Test {
+
+	@Test
+	public void toListTest() {
+		List<String> redisList = CollUtil.newArrayList(
+				"{\"updateDate\":1583376342000,\"code\":\"move\",\"id\":1,\"sort\":1,\"name\":\"电影大全\"}",
+				"{\"updateDate\":1583378882000,\"code\":\"zy\",\"id\":3,\"sort\":5,\"name\":\"综艺会\"}"
+		);
+
+		// 手动parse
+		final JSONArray jsonArray = new JSONArray();
+		for (String str : redisList) {
+			jsonArray.add(JSONUtil.parse(str));
+		}
+
+		final List<Vcc> vccs = jsonArray.toList(Vcc.class);
+		for (Vcc vcc : vccs) {
+			Assert.assertNotNull(vcc);
+		}
+	}
+
+	@Data
+	public static class Vcc implements Serializable {
+		private static final long serialVersionUID = 1L;
+		private Long id;
+		private Date updateDate;
+		private String code;
+		private String name;
+		private Integer sort;
+	}
+}