Merge pull request #48129 from linw-bai

* pr/48129:
  Use beanClassLoader when checking excluded auto-configuration classes

Closes gh-48129

Author: snicoll

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/AutoConfigurationImportSelector.java

@@ -205,8 +205,9 @@ protected List<String> getCandidateConfigurations(AnnotationMetadata metadata, A
 
 	private void checkExcludedClasses(List<String> configurations, Set<String> exclusions) {
 		List<String> invalidExcludes = new ArrayList<>(exclusions.size());
+		ClassLoader classLoader = (this.beanClassLoader != null) ? this.beanClassLoader : getClass().getClassLoader();
 		for (String exclusion : exclusions) {
-			if (ClassUtils.isPresent(exclusion, getClass().getClassLoader()) && !configurations.contains(exclusion)) {
+			if (ClassUtils.isPresent(exclusion, classLoader) && !configurations.contains(exclusion)) {
 				invalidExcludes.add(exclusion);
 			}
 		}