Honor @Order for Map injection sorting order

spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java

@@ -119,6 +119,7 @@
  * @author Phillip Webb
  * @author Stephane Nicoll
  * @author Sebastien Deleuze
+ * @author Yanming Zhou
  * @since 16 April 2001
  * @see #registerBeanDefinition
  * @see #addBeanPostProcessor
@@ -1806,6 +1807,10 @@ else if (Map.class.isAssignableFrom(type) && type.isInterface()) {
 		if (autowiredBeanNames != null) {
 			autowiredBeanNames.addAll(matchingBeans.keySet());
 		}
+		Comparator<Object> comparator = adaptDependencyComparator(matchingBeans);
+		if (comparator != null) {
+			matchingBeans = sortMatchingBeans(matchingBeans, comparator);
+		}
 		TypeConverter converter = (typeConverter != null ? typeConverter : getTypeConverter());
 		return converter.convertIfNecessary(matchingBeans, descriptor.getDependencyType());
 	}
@@ -1819,6 +1824,16 @@ private boolean isRequired(DependencyDescriptor descriptor) {
 		return getAutowireCandidateResolver().isRequired(descriptor);
 	}
 
+	private <T> Map<String, T> sortMatchingBeans(Map<String, T> matchingBeans, Comparator<Object> comparator) {
+		List<Map.Entry<String, T>> list = new ArrayList<>(matchingBeans.entrySet());
+		list.sort(Map.Entry.comparingByValue(comparator));
+		Map<String, T> result = CollectionUtils.newLinkedHashMap(list.size());
+		for(Map.Entry<String, T> entry : list) {
+			result.put(entry.getKey(), entry.getValue());
+		}
+		return result;
+	}
+
 	private @Nullable Comparator<Object> adaptDependencyComparator(Map<String, ?> matchingBeans) {
 		Comparator<Object> comparator = getDependencyComparator();
 		if (comparator instanceof OrderComparator orderComparator) {

spring-beans/src/test/java/org/springframework/beans/factory/annotation/AutowiredAnnotationBeanPostProcessorTests.java

@@ -62,6 +62,7 @@
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.beans.factory.config.TypedStringValue;
+import org.springframework.beans.factory.support.AbstractBeanDefinition;
 import org.springframework.beans.factory.support.AutowireCandidateQualifier;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.beans.factory.support.GenericBeanDefinition;
@@ -93,6 +94,7 @@
  * @author Sam Brannen
  * @author Chris Beams
  * @author Stephane Nicoll
+ * @author Yanming Zhou
  */
 class AutowiredAnnotationBeanPostProcessorTests {
 
@@ -1297,6 +1299,32 @@ void methodInjectionWithMap() {
 		assertThat(bean.getTestBean()).isSameAs(tb);
 	}
 
+	@Test
+	void mapInjectionShouldHonorTheSortingOrder() {
+		RootBeanDefinition bd = new RootBeanDefinition(MapMethodInjectionBean.class);
+		bf.registerBeanDefinition("annotatedBean", bd);
+		RootBeanDefinition bd1 = new RootBeanDefinition();
+		bd1.setBeanClass(TestBean.class);
+		bd1.setAttribute(AbstractBeanDefinition.ORDER_ATTRIBUTE, Ordered.LOWEST_PRECEDENCE);
+		bf.registerBeanDefinition("bean1", bd1);
+		RootBeanDefinition bd2 = new RootBeanDefinition();
+		bd2.setBeanClass(DerivedTestBean.class);
+		bd2.setAttribute(AbstractBeanDefinition.ORDER_ATTRIBUTE, Ordered.HIGHEST_PRECEDENCE);
+		bd2.setPrimary(true);
+		bf.registerBeanDefinition("bean2", bd2);
+		RootBeanDefinition bd3 = new RootBeanDefinition();
+		bd3.setBeanClass(TestBean.class);
+		bd3.setAttribute(AbstractBeanDefinition.ORDER_ATTRIBUTE, Ordered.HIGHEST_PRECEDENCE + 1);
+		bf.registerBeanDefinition("bean3", bd3);
+		RootBeanDefinition bd4 = new RootBeanDefinition();
+		bd4.setBeanClass(TestBean.class);
+		bd4.setAttribute(AbstractBeanDefinition.ORDER_ATTRIBUTE, Ordered.LOWEST_PRECEDENCE - 1);
+		bf.registerBeanDefinition("bean4", bd4);
+
+		MapMethodInjectionBean bean = bf.getBean("annotatedBean", MapMethodInjectionBean.class);
+		assertThat(bean.getTestBeanMap().keySet()).containsExactly("bean2", "bean3", "bean4", "bean1");
+	}
+
 	@Test
 	void methodInjectionWithMapAndMultipleMatches() {
 		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(MapMethodInjectionBean.class));