diff --git a/hutool-core/src/main/java/org/dromara/hutool/core/map/MapUtil.java b/hutool-core/src/main/java/org/dromara/hutool/core/map/MapUtil.java
index d1269a761..48e87c9b6 100644
--- a/hutool-core/src/main/java/org/dromara/hutool/core/map/MapUtil.java
+++ b/hutool-core/src/main/java/org/dromara/hutool/core/map/MapUtil.java
@@ -1374,4 +1374,43 @@ public class MapUtil extends MapGetUtil {
 		}
 		return list;
 	}
+
+	/**
+	 * 遍历Map，返回第一个匹配的value值
+	 *
+	 * @param map       map
+	 * @param predicate 匹配条件
+	 * @param <K>       键类型
+	 * @param <V>       值类型
+	 * @return value值
+	 * @since 6.0.0
+	 */
+	public static <K, V> V firstMatchValue(final Map<K, V> map, final Predicate<Entry<K, V>> predicate) {
+		final Entry<K, V> kvEntry = firstMatch(map, predicate);
+		if (null != kvEntry) {
+			return kvEntry.getValue();
+		}
+		return null;
+	}
+
+	/**
+	 * 遍历Map，返回第一个匹配的entry值
+	 *
+	 * @param map       map
+	 * @param predicate 匹配条件
+	 * @param <K>       键类型
+	 * @param <V>       值类型
+	 * @return entry
+	 * @since 6.0.0
+	 */
+	public static <K, V> Entry<K, V> firstMatch(final Map<K, V> map, final Predicate<Entry<K, V>> predicate) {
+		if (isNotEmpty(map)) {
+			for (final Entry<K, V> entry : map.entrySet()) {
+				if (predicate.test(entry)) {
+					return entry;
+				}
+			}
+		}
+		return null;
+	}
 }
diff --git a/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkHttpResponse.java b/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkHttpResponse.java
index 79450b72d..291654256 100644
--- a/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkHttpResponse.java
+++ b/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkHttpResponse.java
@@ -15,6 +15,8 @@ package org.dromara.hutool.http.client.engine.jdk;
 import org.dromara.hutool.core.array.ArrayUtil;
 import org.dromara.hutool.core.io.IoUtil;
 import org.dromara.hutool.core.io.stream.EmptyInputStream;
+import org.dromara.hutool.core.map.MapUtil;
+import org.dromara.hutool.core.text.StrUtil;
 import org.dromara.hutool.core.util.ObjUtil;
 import org.dromara.hutool.http.HttpException;
 import org.dromara.hutool.http.HttpUtil;
@@ -94,7 +96,11 @@ public class JdkHttpResponse implements Response, Closeable {
 
 	@Override
 	public String header(final String name) {
-		final List<String> headerValues = this.headers.get(name);
+		List<String> headerValues = this.headers.get(name);
+		if(null == headerValues){
+			// issue#I96U4T，根据RFC2616规范，header的name不区分大小写
+			headerValues = MapUtil.firstMatchValue(this.headers, entry-> StrUtil.equalsIgnoreCase(name, entry.getKey()));
+		}
 		if (ArrayUtil.isNotEmpty(headerValues)) {
 			return headerValues.get(0);
 		}