Add "application/*+xml" to XML decoders

Closes gh-24164

spring-web/src/main/java/org/springframework/http/codec/xml/Jaxb2XmlDecoder.java

@@ -52,6 +52,7 @@ import org.springframework.core.io.buffer.DataBuffer;
 import org.springframework.core.io.buffer.DataBufferLimitException;
 import org.springframework.core.io.buffer.DataBufferUtils;
 import org.springframework.core.log.LogFormatUtils;
+import org.springframework.http.MediaType;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
@@ -92,7 +93,7 @@ public class Jaxb2XmlDecoder extends AbstractDecoder<Object> {
 
 
 	public Jaxb2XmlDecoder() {
-		super(MimeTypeUtils.APPLICATION_XML, MimeTypeUtils.TEXT_XML);
+		super(MimeTypeUtils.APPLICATION_XML, MimeTypeUtils.TEXT_XML, new MediaType("application", "*+xml"));
 	}
 
 	/**

spring-web/src/main/java/org/springframework/http/codec/xml/XmlEventDecoder.java

@@ -42,6 +42,7 @@ import org.springframework.core.codec.AbstractDecoder;
 import org.springframework.core.io.buffer.DataBuffer;
 import org.springframework.core.io.buffer.DataBufferLimitException;
 import org.springframework.core.io.buffer.DataBufferUtils;
+import org.springframework.http.MediaType;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.MimeType;
@@ -94,7 +95,7 @@ public class XmlEventDecoder extends AbstractDecoder<XMLEvent> {
 
 
 	public XmlEventDecoder() {
-		super(MimeTypeUtils.APPLICATION_XML, MimeTypeUtils.TEXT_XML);
+		super(MimeTypeUtils.APPLICATION_XML, MimeTypeUtils.TEXT_XML, new MediaType("application", "*+xml"));
 	}