Merge branch '6.2.x'

spring-web/src/main/java/org/springframework/http/converter/xml/AbstractJaxb2HttpMessageConverter.java

@@ -16,6 +16,7 @@
 
 package org.springframework.http.converter.xml;
 
+import java.nio.charset.Charset;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
@@ -23,7 +24,10 @@ import jakarta.xml.bind.JAXBContext;
 import jakarta.xml.bind.JAXBException;
 import jakarta.xml.bind.Marshaller;
 import jakarta.xml.bind.Unmarshaller;
+import org.jspecify.annotations.Nullable;
 
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
 import org.springframework.http.converter.HttpMessageConversionException;
 
 /**
@@ -116,4 +120,19 @@ public abstract class AbstractJaxb2HttpMessageConverter<T> extends AbstractXmlHt
 		});
 	}
 
+	/**
+	 * Detect the charset from the given {@link HttpHeaders#getContentType()}.
+	 * @param httpHeaders the current HTTP headers
+	 * @return the charset defined in the content type header, or {@code null} if not found
+	 */
+	protected @Nullable Charset detectCharset(HttpHeaders httpHeaders) {
+		MediaType contentType = httpHeaders.getContentType();
+		if (contentType != null && contentType.getCharset() != null) {
+			return contentType.getCharset();
+		}
+		else {
+			return null;
+		}
+	}
+
 }

spring-web/src/main/java/org/springframework/http/converter/xml/Jaxb2CollectionHttpMessageConverter.java

@@ -19,6 +19,7 @@ package org.springframework.http.converter.xml;
 import java.io.IOException;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
+import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.LinkedHashSet;
@@ -148,7 +149,10 @@ public class Jaxb2CollectionHttpMessageConverter<T extends Collection>
 
 		try {
 			Unmarshaller unmarshaller = createUnmarshaller(elementClass);
-			XMLStreamReader streamReader = this.inputFactory.createXMLStreamReader(inputMessage.getBody());
+			Charset detectedCharset = detectCharset(inputMessage.getHeaders());
+			XMLStreamReader streamReader = (detectedCharset != null) ?
+					this.inputFactory.createXMLStreamReader(inputMessage.getBody(), detectedCharset.name()) :
+					this.inputFactory.createXMLStreamReader(inputMessage.getBody());
 			int event = moveToFirstChildOfRootElement(streamReader);
 
 			while (event != XMLStreamReader.END_DOCUMENT) {

spring-web/src/main/java/org/springframework/http/converter/xml/Jaxb2RootElementHttpMessageConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 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.
@@ -17,6 +17,7 @@
 package org.springframework.http.converter.xml;
 
 import java.io.StringReader;
+import java.nio.charset.Charset;
 
 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.parsers.SAXParser;
@@ -134,7 +135,7 @@ public class Jaxb2RootElementHttpMessageConverter extends AbstractJaxb2HttpMessa
 	@Override
 	protected Object readFromSource(Class<?> clazz, HttpHeaders headers, Source source) throws Exception {
 		try {
-			source = processSource(source);
+			source = processSource(source, detectCharset(headers));
 			Unmarshaller unmarshaller = createUnmarshaller(clazz);
 			if (clazz.isAnnotationPresent(XmlRootElement.class)) {
 				return unmarshaller.unmarshal(source);
@@ -159,9 +160,12 @@ public class Jaxb2RootElementHttpMessageConverter extends AbstractJaxb2HttpMessa
 		}
 	}
 
-	protected Source processSource(Source source) {
+	protected Source processSource(Source source, @Nullable Charset charset) {
 		if (source instanceof StreamSource streamSource) {
 			InputSource inputSource = new InputSource(streamSource.getInputStream());
+			if (charset != null) {
+				inputSource.setEncoding(charset.name());
+			}
 			try {
 				// By default, Spring will prevent the processing of external entities.
 				// This is a mitigation against XXE attacks.

spring-web/src/test/java/org/springframework/http/converter/xml/Jaxb2CollectionHttpMessageConverterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 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.
@@ -35,6 +35,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.core.io.Resource;
+import org.springframework.http.MediaType;
 import org.springframework.http.converter.HttpMessageNotReadableException;
 import org.springframework.web.testfixture.http.MockHttpInputMessage;
 
@@ -204,6 +205,18 @@ class Jaxb2CollectionHttpMessageConverterTests {
 				.withMessageContaining("\"lol9\"");
 	}
 
+	@Test
+	@SuppressWarnings("unchecked")
+	public void readXmlRootElementListHeaderCharset() throws Exception {
+		String content = "<list><rootElement><type s=\"Hellø Wørld\"/></rootElement></list>";
+		MockHttpInputMessage inputMessage = new MockHttpInputMessage(content.getBytes(StandardCharsets.ISO_8859_1));
+		inputMessage.getHeaders().setContentType(MediaType.parseMediaType("application/xml;charset=iso-8859-1"));
+		List<RootElement> result = (List<RootElement>) converter.read(rootElementListType, null, inputMessage);
+
+		assertThat(result).as("Invalid result").hasSize(1);
+		assertThat(result.get(0).type.s).as("Invalid result").isEqualTo("Hellø Wørld");
+	}
+
 
 	@XmlRootElement
 	public static class RootElement {

spring-web/src/test/java/org/springframework/http/converter/xml/Jaxb2RootElementHttpMessageConverterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 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.
@@ -180,6 +180,15 @@ class Jaxb2RootElementHttpMessageConverterTests {
 				.withMessageContaining("DOCTYPE");
 	}
 
+	@Test
+	void readXmlRootElementHeaderCharset() throws Exception {
+		byte[] body = "<rootElement><type s=\"Hellø Wørld\"/></rootElement>".getBytes(StandardCharsets.ISO_8859_1);
+		MockHttpInputMessage inputMessage = new MockHttpInputMessage(body);
+		inputMessage.getHeaders().setContentType(MediaType.parseMediaType("application/xml;charset=iso-8859-1"));
+		RootElement result = (RootElement) converter.read(RootElement.class, inputMessage);
+		assertThat(result.type.s).as("Invalid result").isEqualTo("Hellø Wørld");
+	}
+
 	@Test
 	void writeXmlRootElement() throws Exception {
 		MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();