diff --git a/hutool-http/src/main/java/org/dromara/hutool/http/client/Request.java b/hutool-http/src/main/java/org/dromara/hutool/http/client/Request.java
index 77497f661..4e67d83c0 100644
--- a/hutool-http/src/main/java/org/dromara/hutool/http/client/Request.java
+++ b/hutool-http/src/main/java/org/dromara/hutool/http/client/Request.java
@@ -204,16 +204,6 @@ public class Request implements HeaderOperation<Request> {
 		return MapUtil.view(this.headers);
 	}
 
-	/**
-	 * 是否为Transfer-Encoding:Chunked的内容
-	 *
-	 * @return 是否为Transfer-Encoding:Chunked的内容
-	 */
-	public boolean isChunked() {
-		final String transferEncoding = header(HeaderName.TRANSFER_ENCODING);
-		return "Chunked".equalsIgnoreCase(transferEncoding);
-	}
-
 	/**
 	 * 设置一个header<br>
 	 * 如果覆盖模式，则替换之前的值，否则加入到值列表中<br>
diff --git a/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkClientEngine.java b/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkClientEngine.java
index 894466570..190388638 100644
--- a/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkClientEngine.java
+++ b/hutool-http/src/main/java/org/dromara/hutool/http/client/engine/jdk/JdkClientEngine.java
@@ -21,14 +21,13 @@ import org.dromara.hutool.core.util.ObjUtil;
 import org.dromara.hutool.http.HttpException;
 import org.dromara.hutool.http.HttpUtil;
 import org.dromara.hutool.http.client.ClientConfig;
-import org.dromara.hutool.http.client.engine.ClientEngine;
 import org.dromara.hutool.http.client.Request;
 import org.dromara.hutool.http.client.Response;
 import org.dromara.hutool.http.client.body.HttpBody;
 import org.dromara.hutool.http.client.cookie.GlobalCookieManager;
+import org.dromara.hutool.http.client.engine.ClientEngine;
 import org.dromara.hutool.http.meta.HeaderName;
 import org.dromara.hutool.http.meta.HttpStatus;
-import org.dromara.hutool.http.meta.Method;
 
 import java.io.IOException;
 import java.net.HttpURLConnection;
@@ -125,11 +124,21 @@ public class JdkClientEngine implements ClientEngine {
 			.setSSLInfo(config.getSslInfo())
 			// 关闭JDK自动转发，采用手动转发方式
 			.setInstanceFollowRedirects(false)
-			.setChunkedStreamingMode(message.isChunked() ? 4096 : -1)
 			.setDisableCache(config.isDisableCache())
 			// 覆盖默认Header
 			.header(message.headers(), true);
 
+		if(!message.method().isIgnoreBody()){
+			// 在允许发送body的情况下，如果用户自定义了Content-Length，则使用用户定义的值
+			final long contentLength = message.contentLength();
+			if(contentLength > 0){
+				// 固定请求长度
+				conn.setFixedLengthStreamingMode(contentLength);
+			} else if(message.isChunked()){
+				conn.setChunkedStreamingMode(4096);
+			}
+		}
+
 		if (null == message.header(HeaderName.COOKIE)) {
 			// 用户没有自定义Cookie，则读取全局Cookie信息并附带到请求中
 			GlobalCookieManager.add(conn);
@@ -169,8 +178,7 @@ public class JdkClientEngine implements ClientEngine {
 		}
 
 		// 最终页面
-		return new JdkHttpResponse(conn, true, message.charset(), isAsync,
-			isIgnoreResponseBody(message.method()));
+		return new JdkHttpResponse(conn, true, message.charset(), isAsync, message.method().isIgnoreBody());
 	}
 
 	/**
@@ -208,18 +216,4 @@ public class JdkClientEngine implements ClientEngine {
 
 		return redirectUrl;
 	}
-
-	/**
-	 * 是否忽略读取响应body部分<br>
-	 * HEAD、CONNECT、TRACE方法将不读取响应体
-	 *
-	 * @return 是否需要忽略响应body部分
-	 */
-	private boolean isIgnoreResponseBody(final Method method) {
-		//https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Methods/OPTIONS
-		// OPTIONS请求可以带有响应体
-		return Method.HEAD == method
-			|| Method.CONNECT == method
-			|| Method.TRACE == method;
-	}
 }
diff --git a/hutool-http/src/main/java/org/dromara/hutool/http/meta/Method.java b/hutool-http/src/main/java/org/dromara/hutool/http/meta/Method.java
index a17c13f53..90df6d5f3 100644
--- a/hutool-http/src/main/java/org/dromara/hutool/http/meta/Method.java
+++ b/hutool-http/src/main/java/org/dromara/hutool/http/meta/Method.java
@@ -18,5 +18,24 @@ package org.dromara.hutool.http.meta;
  * @author Looly
  */
 public enum Method {
-	GET, POST, HEAD, OPTIONS, PUT, DELETE, TRACE, CONNECT, PATCH
+	GET, POST, HEAD, OPTIONS, PUT, DELETE, TRACE, CONNECT, PATCH;
+
+	/**
+	 * 是否忽略读取响应body部分<br>
+	 * HEAD、CONNECT、TRACE方法将不读取响应体
+	 *
+	 * @return 是否需要忽略响应body部分
+	 */
+	public boolean isIgnoreBody() {
+		//https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Methods/OPTIONS
+		// OPTIONS请求可以带有响应体
+		switch (this){
+			case HEAD:
+			case CONNECT:
+			case TRACE:
+				return true;
+			default:
+				return false;
+		}
+	}
 }
diff --git a/hutool-http/src/test/java/org/dromara/hutool/http/HttpUtilTest.java b/hutool-http/src/test/java/org/dromara/hutool/http/HttpUtilTest.java
index 280428906..9dcee1071 100644
--- a/hutool-http/src/test/java/org/dromara/hutool/http/HttpUtilTest.java
+++ b/hutool-http/src/test/java/org/dromara/hutool/http/HttpUtilTest.java
@@ -27,7 +27,6 @@ import org.junit.jupiter.api.Test;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.concurrent.TimeUnit;
 
 @SuppressWarnings("resource")
 public class HttpUtilTest {
@@ -97,6 +96,8 @@ public class HttpUtilTest {
 	@Test
 	@Disabled
 	public void get12306Test() {
+		// 某些网站需要打开信任全部域
+		// HttpGlobalConfig.setTrustAnyHost(true);
 		HttpUtil.send(Request.of("https://kyfw.12306.cn/otn/").setMaxRedirectCount(2))
 				.then(response -> Console.log(response.bodyStr()));
 	}
@@ -195,7 +196,7 @@ public class HttpUtilTest {
 	@Test
 	@Disabled
 	public void httpUtilCreateRequest1PostSoap11Test(){
-		String requestBody = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
+		final String requestBody = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
 			"<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\"\n" +
 			"  xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">\n" +
 			"  <soap:Body>\n" +
@@ -205,7 +206,7 @@ public class HttpUtilTest {
 			"  </soap:Body>\n" +
 			"</soap:Envelope>";
 
-		String body = HttpUtil.createRequest("http://www.webxml.com.cn/WebServices/IpAddressSearchWebService.asmx", Method.POST)
+		final String body = HttpUtil.createRequest("http://www.webxml.com.cn/WebServices/IpAddressSearchWebService.asmx", Method.POST)
 			.header(HeaderName.CONTENT_TYPE, "text/xml; charset=utf-8")
 			.header("Accept", "application/xml")
 			.header("accessId", "")
@@ -222,7 +223,7 @@ public class HttpUtilTest {
 	@Test
 	@Disabled
 	public void httpUtilCreateRequest2PostSoap12Test(){
-		String requestBody = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
+		final String requestBody = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
 			"<soap12:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\"\n" +
 			"  xmlns:soap12=\"http://www.w3.org/2003/05/soap-envelope\">\n" +
 			"  <soap12:Body>\n" +
@@ -232,7 +233,7 @@ public class HttpUtilTest {
 			"  </soap12:Body>\n" +
 			"</soap12:Envelope>";
 
-		String body = HttpUtil.createPost("http://www.webxml.com.cn/WebServices/IpAddressSearchWebService.asmx")
+		final String body = HttpUtil.createPost("http://www.webxml.com.cn/WebServices/IpAddressSearchWebService.asmx")
 			.header(HeaderName.CONTENT_TYPE, "application/soap+xml; charset=utf-8")
 			.header("Accept", "application/xml")
 			.header("accessId", "")
@@ -255,7 +256,7 @@ public class HttpUtilTest {
 			;
 		//设置超时
 		HttpGlobalConfig.setTimeout(1);
-		String body = HttpUtil.createGet("https://echo.apifox.com/get")
+		final String body = HttpUtil.createGet("https://echo.apifox.com/get")
 			.header(HeaderName.CONTENT_TYPE, "application/x-www-form-urlencoded; charset=utf-8")
 			.header("User-Agent", "Apifox/1.0.0 (https://apifox.com)")
 			.header("Accept", "*/*")
@@ -272,8 +273,8 @@ public class HttpUtilTest {
 	@Test
 	@Disabled
 	public void httpUtilCreateRequest4PostTest(){
-		String requestBodyJson = "{\n\"username\": \"张三\",\n    \"password\": \"abcdefg@123\"\n}";
-		String body = HttpUtil.createPost("https://echo.apifox.com/post?q1=v1&q2=v2")
+		final String requestBodyJson = "{\n\"username\": \"张三\",\n    \"password\": \"abcdefg@123\"\n}";
+		final String body = HttpUtil.createPost("https://echo.apifox.com/post?q1=v1&q2=v2")
 			.header("User-Agent", "Apifox/1.0.0 (https://apifox.com)")
 			.header("Content-Type", "application/json")
 			.header("Accept", "*/*")
diff --git a/hutool-http/src/test/java/org/dromara/hutool/http/client/JdkEngineTest.java b/hutool-http/src/test/java/org/dromara/hutool/http/client/JdkClientEngineTest.java
similarity index 73%
rename from hutool-http/src/test/java/org/dromara/hutool/http/client/JdkEngineTest.java
rename to hutool-http/src/test/java/org/dromara/hutool/http/client/JdkClientEngineTest.java
index f90c9ce7e..17d819142 100644
--- a/hutool-http/src/test/java/org/dromara/hutool/http/client/JdkEngineTest.java
+++ b/hutool-http/src/test/java/org/dromara/hutool/http/client/JdkClientEngineTest.java
@@ -19,7 +19,7 @@ import org.dromara.hutool.http.meta.Method;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
-public class JdkEngineTest {
+public class JdkClientEngineTest {
 
 	@Test
 	@Disabled
@@ -34,4 +34,20 @@ public class JdkEngineTest {
 		Console.log(res.headers());
 		Console.log(res.bodyStr());
 	}
+
+	@Test
+	@Disabled
+	public void postTest(){
+		final ClientEngine engine = HttpUtil.createClient("jdkClient");
+
+		final Request req = Request.of("https://www.hutool.cn/")
+			.method(Method.POST)
+			.body("a=1&b=2");
+		final Response res = engine.send(req);
+
+		Console.log(res.getStatus());
+		Console.log(res.headers().getClass());
+		Console.log(res.headers());
+		Console.log(res.bodyStr());
+	}
 }