Restore canonical name representation for 6.2

See gh-32405

Author: jhoeller

spring-core/src/main/java/org/springframework/core/convert/TypeDescriptor.java

@@ -545,7 +545,7 @@ public int hashCode() {
 	public String toString() {
 		StringBuilder builder = new StringBuilder();
 		for (Annotation ann : getAnnotations()) {
-			builder.append('@').append(ann.annotationType().getName()).append(' ');
+			builder.append('@').append(getName(ann.annotationType())).append(' ');
 		}
 		builder.append(getResolvableType());
 		return builder.toString();
@@ -733,6 +733,11 @@ public static TypeDescriptor nested(Property property, int nestingLevel) {
 		return new TypeDescriptor(property).nested(nestingLevel);
 	}
 
+	private static String getName(Class<?> clazz) {
+		String canonicalName = clazz.getCanonicalName();
+		return (canonicalName != null ? canonicalName : clazz.getName());
+	}
+
 
 	/**
 	 * Adapter class for exposing a {@code TypeDescriptor}'s annotations as an