diff --git a/hutool-core/src/main/java/cn/hutool/core/convert/NumberWithFormat.java b/hutool-core/src/main/java/cn/hutool/core/convert/NumberWithFormat.java
index 6828049d5..4982eebfa 100644
--- a/hutool-core/src/main/java/cn/hutool/core/convert/NumberWithFormat.java
+++ b/hutool-core/src/main/java/cn/hutool/core/convert/NumberWithFormat.java
@@ -13,7 +13,7 @@ import java.util.Date;
  * @author looly
  * @since 5.8.13
  */
-public class NumberWithFormat extends Number implements TypeConverter{
+public class NumberWithFormat extends Number implements TypeConverter {
 	private static final long serialVersionUID = 1L;
 
 	private final Number number;
@@ -21,6 +21,7 @@ public class NumberWithFormat extends Number implements TypeConverter{
 
 	/**
 	 * 构造
+	 *
 	 * @param number 数字
 	 * @param format 格式
 	 */
@@ -40,7 +41,7 @@ public class NumberWithFormat extends Number implements TypeConverter{
 				return new DateConverter((Class<? extends Date>) clazz, format).convert(this.number, null);
 			} else if (TemporalAccessor.class.isAssignableFrom(clazz)) {
 				return new TemporalAccessorConverter(clazz, format).convert(this.number, null);
-			} else if(String.class == clazz){
+			} else if (String.class == clazz) {
 				return toString();
 			}
 
@@ -51,6 +52,16 @@ public class NumberWithFormat extends Number implements TypeConverter{
 		return Convert.convertWithCheck(targetType, this.number, null, false);
 	}
 
+	/**
+	 * 获取原始Number
+	 *
+	 * @return 原始Number
+	 * @since 5.8.32
+	 */
+	public Object getNumber() {
+		return this.number;
+	}
+
 	@Override
 	public int intValue() {
 		return this.number.intValue();
diff --git a/hutool-json/src/main/java/cn/hutool/json/JSONUtil.java b/hutool-json/src/main/java/cn/hutool/json/JSONUtil.java
index 6c4a4c975..42510885c 100755
--- a/hutool-json/src/main/java/cn/hutool/json/JSONUtil.java
+++ b/hutool-json/src/main/java/cn/hutool/json/JSONUtil.java
@@ -1,5 +1,6 @@
 package cn.hutool.json;
 
+import cn.hutool.core.convert.NumberWithFormat;
 import cn.hutool.core.io.IORuntimeException;
 import cn.hutool.core.io.file.FileReader;
 import cn.hutool.core.lang.TypeReference;
@@ -754,6 +755,10 @@ public class JSONUtil {
 				|| object instanceof Number //
 				|| ObjectUtil.isBasicType(object) //
 		) {
+			if(object instanceof Number && null != jsonConfig.getDateFormat()){
+				// 当JSONConfig中设置了日期格式，则包装为NumberWithFormat，以便在Converter中使用自定义格式转换日期时间
+				return new NumberWithFormat((Number) object, jsonConfig.getDateFormat());
+			}
 			return object;
 		}
 
diff --git a/hutool-json/src/main/java/cn/hutool/json/serialize/JSONWriter.java b/hutool-json/src/main/java/cn/hutool/json/serialize/JSONWriter.java
index 1023d6713..ff30cc8d6 100755
--- a/hutool-json/src/main/java/cn/hutool/json/serialize/JSONWriter.java
+++ b/hutool-json/src/main/java/cn/hutool/json/serialize/JSONWriter.java
@@ -1,6 +1,7 @@
 package cn.hutool.json.serialize;
 
 import cn.hutool.core.convert.Convert;
+import cn.hutool.core.convert.NumberWithFormat;
 import cn.hutool.core.date.DateUtil;
 import cn.hutool.core.date.TemporalAccessorUtil;
 import cn.hutool.core.date.format.GlobalCustomFormat;
@@ -254,6 +255,11 @@ public class JSONWriter extends Writer {
 		} else if (value instanceof Iterable || value instanceof Iterator || ArrayUtil.isArray(value)) {
 			new JSONArray(value).write(writer, indentFactor, indent);
 		} else if (value instanceof Number) {
+			// issue#IALQ0N，避免设置日期格式后writeLongAsString失效
+			if(value instanceof NumberWithFormat){
+				value = ((NumberWithFormat) value).getNumber();
+			}
+
 			if(value instanceof Long && config.isWriteLongAsString()){
 				// issue#3541
 				// long可能溢出，此时可选是否将long写出为字符串类型
diff --git a/hutool-jwt/src/test/java/cn/hutool/jwt/IssueI6IS5BTest.java b/hutool-jwt/src/test/java/cn/hutool/jwt/IssueI6IS5BTest.java
index 1a72a947a..6534008d0 100644
--- a/hutool-jwt/src/test/java/cn/hutool/jwt/IssueI6IS5BTest.java
+++ b/hutool-jwt/src/test/java/cn/hutool/jwt/IssueI6IS5BTest.java
@@ -5,13 +5,14 @@ import cn.hutool.core.date.LocalDateTimeUtil;
 import cn.hutool.json.JSONObject;
 import cn.hutool.json.JSONUtil;
 import lombok.Data;
-import static org.junit.jupiter.api.Assertions.*;
 import org.junit.jupiter.api.Test;
 
 import java.nio.charset.StandardCharsets;
 import java.time.LocalDateTime;
 import java.util.Date;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 public class IssueI6IS5BTest {
 	@Test
 	public void payloadToBeanTest() {