diff --git a/hutool-http/src/main/java/org/dromara/hutool/http/HttpUtil.java b/hutool-http/src/main/java/org/dromara/hutool/http/HttpUtil.java
index 21e191d1d..251f7c6c5 100644
--- a/hutool-http/src/main/java/org/dromara/hutool/http/HttpUtil.java
+++ b/hutool-http/src/main/java/org/dromara/hutool/http/HttpUtil.java
@@ -12,6 +12,9 @@
 
 package org.dromara.hutool.http;
 
+import org.dromara.hutool.core.collection.CollUtil;
+import org.dromara.hutool.core.map.CaseInsensitiveMap;
+import org.dromara.hutool.core.map.MapUtil;
 import org.dromara.hutool.core.net.url.UrlQueryUtil;
 import org.dromara.hutool.core.text.StrUtil;
 import org.dromara.hutool.http.client.ClientConfig;
@@ -23,6 +26,7 @@ import org.dromara.hutool.http.meta.Method;
 import org.dromara.hutool.http.server.SimpleServer;
 
 import java.nio.charset.Charset;
+import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 
@@ -269,6 +273,7 @@ public class HttpUtil {
 
 	/**
 	 * 打印{@link Response} 为可读形式
+	 *
 	 * @param response {@link Response}
 	 * @return 字符串
 	 */
@@ -285,4 +290,26 @@ public class HttpUtil {
 
 		return sb.toString();
 	}
+
+	/**
+	 * 获取指定的Header值，如果不存在返回{@code null}<br>
+	 * 根据RFC2616规范，header的name不区分大小写，因此首先get值，不存在则遍历匹配不区分大小写的key。
+	 *
+	 * @param headers 头信息的Map
+	 * @param name    header名
+	 * @return header值
+	 * @since 6.0.0
+	 */
+	public static String header(final Map<String, ? extends Collection<String>> headers, final String name) {
+		Collection<String> values = headers.get(name);
+		if (null == values && !(headers instanceof CaseInsensitiveMap)) {
+			// issue#I96U4T，根据RFC2616规范，header的name不区分大小写
+			values = MapUtil.firstMatchValue(headers, entry -> StrUtil.equalsIgnoreCase(name, entry.getKey()));
+		}
+		if (CollUtil.isNotEmpty(values)) {
+			return CollUtil.getFirst(values);
+		}
+
+		return null;
+	}
 }
diff --git a/hutool-http/src/main/java/org/dromara/hutool/http/client/HeaderOperation.java b/hutool-http/src/main/java/org/dromara/hutool/http/client/HeaderOperation.java
index 93be10036..67d9ee5f1 100644
--- a/hutool-http/src/main/java/org/dromara/hutool/http/client/HeaderOperation.java
+++ b/hutool-http/src/main/java/org/dromara/hutool/http/client/HeaderOperation.java
@@ -17,6 +17,7 @@ import org.dromara.hutool.core.collection.CollUtil;
 import org.dromara.hutool.core.collection.ListUtil;
 import org.dromara.hutool.core.map.MapUtil;
 import org.dromara.hutool.core.text.StrUtil;
+import org.dromara.hutool.http.HttpUtil;
 import org.dromara.hutool.http.meta.HeaderName;
 
 import java.net.HttpCookie;
@@ -71,17 +72,7 @@ public interface HeaderOperation<T extends HeaderOperation<T>> {
 	 * @return header值
 	 */
 	default String header(final String name) {
-		final Map<String, ? extends Collection<String>> headers = headers();
-		Collection<String> values = headers.get(name);
-		if(null == values){
-			// issue#I96U4T，根据RFC2616规范，header的name不区分大小写
-			values = MapUtil.firstMatchValue(headers, entry-> StrUtil.equalsIgnoreCase(name, entry.getKey()));
-		}
-		if (ArrayUtil.isNotEmpty(values)) {
-			return CollUtil.getFirst(values);
-		}
-
-		return null;
+		return HttpUtil.header(headers(), name);
 	}
 
 	/**
diff --git a/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkHttpConnection.java b/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkHttpConnection.java
index 5f85440d6..6d8f05f5b 100644
--- a/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkHttpConnection.java
+++ b/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkHttpConnection.java
@@ -12,9 +12,7 @@
 
 package org.dromara.hutool.http.client.engine.jdk;
 
-import org.dromara.hutool.core.collection.CollUtil;
 import org.dromara.hutool.core.lang.Opt;
-import org.dromara.hutool.core.map.MapUtil;
 import org.dromara.hutool.core.net.url.UrlUtil;
 import org.dromara.hutool.core.reflect.FieldUtil;
 import org.dromara.hutool.core.text.StrUtil;
@@ -32,7 +30,6 @@ import java.net.HttpURLConnection;
 import java.net.ProtocolException;
 import java.net.Proxy;
 import java.net.URL;
-import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 
@@ -295,13 +292,8 @@ public class JdkHttpConnection implements HeaderOperation<JdkHttpConnection>, Cl
 	 */
 	@Override
 	public String header(final String name) {
-		String headerField = this.conn.getHeaderField(name);
-		if (null == headerField) {
-			final Map<String, ? extends Collection<String>> headers = headers();
-			headerField = CollUtil.getFirst(MapUtil.firstMatchValue(headers, entry -> StrUtil.equalsIgnoreCase(name, entry.getKey())));
-		}
-
-		return headerField;
+		// getHeaderField已经实现忽略大小写
+		return this.conn.getHeaderField(name);
 	}
 
 	/**
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 291654256..d229a60d8 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
@@ -12,11 +12,8 @@
 
 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;
@@ -96,15 +93,7 @@ public class JdkHttpResponse implements Response, Closeable {
 
 	@Override
 	public String header(final String 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);
-		}
-		return null;
+		return HttpUtil.header(this.headers, name);
 	}
 
 	/**