Handle zero readTimeout in JdkClientHttpRequestFactory

Closes gh-37232

Signed-off-by: Tran Ngoc Nhan <ngocnhan.tran1996@gmail.com>

spring-web/src/main/java/org/springframework/http/client/JdkClientHttpRequestFactory.java

@@ -86,7 +86,7 @@ public class JdkClientHttpRequestFactory implements ClientHttpRequestFactory {
 	 * @see java.net.http.HttpRequest.Builder#timeout
 	 */
 	public void setReadTimeout(int readTimeout) {
-		this.readTimeout = Duration.ofMillis(readTimeout);
+		this.readTimeout = readTimeout == 0 ? null : Duration.ofMillis(readTimeout);
 	}
 
 	/**
@@ -95,7 +95,7 @@ public class JdkClientHttpRequestFactory implements ClientHttpRequestFactory {
 	 * @see java.net.http.HttpRequest.Builder#timeout
 	 */
 	public void setReadTimeout(Duration readTimeout) {
-		this.readTimeout = readTimeout;
+		this.readTimeout = Duration.ZERO.equals(readTimeout) ? null : readTimeout;
 	}
 
 	/**

spring-web/src/test/java/org/springframework/http/client/JdkClientHttpRequestFactoryTests.java

@@ -19,6 +19,7 @@ package org.springframework.http.client;
 import java.io.IOException;
 import java.net.URI;
 import java.nio.charset.StandardCharsets;
+import java.time.Duration;
 
 import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.AfterAll;
@@ -109,6 +110,28 @@ class JdkClientHttpRequestFactoryTests extends AbstractHttpRequestFactoryTests {
 		}
 	}
 
+	@Test
+	void readTimeoutZeroShouldNotThrowException() throws Exception {
+		((JdkClientHttpRequestFactory) factory).setReadTimeout(0);
+		URI uri = URI.create(this.baseUrl + "/methods/get");
+		ClientHttpRequest request =
+				new BufferingClientHttpRequestFactory(this.factory).createRequest(uri, HttpMethod.GET);
+		try (ClientHttpResponse response = request.execute()) {
+			assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+		}
+	}
+
+	@Test
+	void readTimeoutDurationZeroShouldNotThrowException() throws Exception {
+		((JdkClientHttpRequestFactory) factory).setReadTimeout(Duration.ZERO);
+		URI uri = URI.create(this.baseUrl + "/methods/get");
+		ClientHttpRequest request =
+				new BufferingClientHttpRequestFactory(this.factory).createRequest(uri, HttpMethod.GET);
+		try (ClientHttpResponse response = request.execute()) {
+			assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+		}
+	}
+
 	@Test
 	void compressionDisabled() throws IOException {
 		URI uri = URI.create(baseUrl + "/compress/");