Support JDK HttpClient in ClientHttpRequestFactories

See gh-36118

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/client/ClientHttpRequestFactories.java

@@ -49,6 +49,7 @@
 import org.springframework.http.client.AbstractClientHttpRequestFactoryWrapper;
 import org.springframework.http.client.ClientHttpRequestFactory;
 import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.http.client.JdkClientHttpRequestFactory;
 import org.springframework.http.client.JettyClientHttpRequestFactory;
 import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
 import org.springframework.http.client.SimpleClientHttpRequestFactory;
@@ -79,6 +80,10 @@ public final class ClientHttpRequestFactories {
 
 	private static final boolean JETTY_CLIENT_PRESENT = ClassUtils.isPresent(JETTY_CLIENT_CLASS, null);
 
+	static final String JDK_CLIENT_CLASS = "java.net.http.HttpClient";
+
+	private static final boolean JDK_CLIENT_PRESENT = ClassUtils.isPresent(JDK_CLIENT_CLASS, null);
+
 	private ClientHttpRequestFactories() {
 	}
 
@@ -99,6 +104,9 @@ public static ClientHttpRequestFactory get(ClientHttpRequestFactorySettings sett
 		if (JETTY_CLIENT_PRESENT) {
 			return Jetty.get(settings);
 		}
+		if (JDK_CLIENT_PRESENT) {
+			return Jdk.get(settings);
+		}
 		return Simple.get(settings);
 	}
 
@@ -126,6 +134,9 @@ public static <T extends ClientHttpRequestFactory> T get(Class<T> requestFactory
 		if (requestFactoryType == JettyClientHttpRequestFactory.class) {
 			return (T) Jetty.get(settings);
 		}
+		if (requestFactoryType == JdkClientHttpRequestFactory.class) {
+			return (T) Jdk.get(settings);
+		}
 		if (requestFactoryType == SimpleClientHttpRequestFactory.class) {
 			return (T) Simple.get(settings);
 		}
@@ -254,6 +265,32 @@ private static JettyClientHttpRequestFactory createRequestFactory(SslBundle sslB
 
 	}
 
+	/**
+	 * Support for {@link JdkClientHttpRequestFactory}.
+	 */
+	static class Jdk {
+
+		static JdkClientHttpRequestFactory get(ClientHttpRequestFactorySettings settings) {
+			java.net.http.HttpClient httpClient = createHttpClient(settings.connectTimeout(), settings.sslBundle());
+			JdkClientHttpRequestFactory requestFactory = new JdkClientHttpRequestFactory(httpClient);
+			PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
+			map.from(settings::readTimeout).asInt(Duration::toMillis).to(requestFactory::setReadTimeout);
+			return requestFactory;
+		}
+
+		private static java.net.http.HttpClient createHttpClient(Duration connectTimeout, SslBundle sslBundle) {
+			java.net.http.HttpClient.Builder builder = java.net.http.HttpClient.newBuilder();
+			if (connectTimeout != null) {
+				builder.connectTimeout(connectTimeout);
+			}
+			if (sslBundle != null) {
+				builder.sslContext(sslBundle.createSslContext());
+			}
+			return builder.build();
+		}
+
+	}
+
 	/**
 	 * Support for {@link SimpleClientHttpRequestFactory}.
 	 */

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/ClientHttpRequestFactoriesJdkClientTests.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2012-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.web.client;
+
+import java.net.http.HttpClient;
+import java.time.Duration;
+
+import org.springframework.boot.testsupport.classpath.ClassPathExclusions;
+import org.springframework.http.client.JdkClientHttpRequestFactory;
+import org.springframework.test.util.ReflectionTestUtils;
+
+/**
+ * Tests for {@link ClientHttpRequestFactories} when JDK HttpClient is the
+ * predominant HTTP client.
+ *
+ * @author Andy Wilkinson
+ */
+@ClassPathExclusions({ "httpclient5-*.jar", "okhttp-*.jar" })
+class ClientHttpRequestFactoriesJdkClientTests
+		extends AbstractClientHttpRequestFactoriesTests<JdkClientHttpRequestFactory> {
+
+	ClientHttpRequestFactoriesJdkClientTests() {
+		super(JdkClientHttpRequestFactory.class);
+	}
+
+	@Override
+	protected long connectTimeout(JdkClientHttpRequestFactory requestFactory) {
+		HttpClient httpClient = (HttpClient) ReflectionTestUtils.getField(requestFactory, "httpClient");
+		return httpClient.connectTimeout().map(Duration::toMillis).orElse(-1L);
+	}
+
+	@Override
+	@SuppressWarnings("unchecked")
+	protected long readTimeout(JdkClientHttpRequestFactory requestFactory) {
+		return ((Duration) ReflectionTestUtils.getField(requestFactory, "readTimeout")).toMillis();
+	}
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/ClientHttpRequestFactoriesSimpleTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@
  *
  * @author Andy Wilkinson
  */
-@ClassPathExclusions({ "httpclient5-*.jar", "okhttp-*.jar", "jetty-client-*.jar" })
+@ClassPathExclusions(files = {"httpclient5-*.jar", "jetty-client-*.jar", "okhttp-*.jar"}, packages = "java.net.http")
 class ClientHttpRequestFactoriesSimpleTests
 		extends AbstractClientHttpRequestFactoriesTests<SimpleClientHttpRequestFactory> {
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/webservices/client/HttpWebServiceMessageSenderBuilderSimpleIntegrationTests.java

@@ -34,7 +34,7 @@
  *
  * @author Stephane Nicoll
  */
-@ClassPathExclusions(files = { "httpclient5-*.jar", "jetty-client-*.jar", "okhttp*.jar" })
+@ClassPathExclusions(files = { "httpclient5-*.jar", "jetty-client-*.jar", "okhttp*.jar" }, packages = "java.net.http")
 class HttpWebServiceMessageSenderBuilderSimpleIntegrationTests {
 
 	private final HttpWebServiceMessageSenderBuilder builder = new HttpWebServiceMessageSenderBuilder();