diff --git a/spring-context/src/main/java/org/springframework/scheduling/annotation/Scheduled.java b/spring-context/src/main/java/org/springframework/scheduling/annotation/Scheduled.java
index 4b8328fadd..7a9195eeab 100644
--- a/spring-context/src/main/java/org/springframework/scheduling/annotation/Scheduled.java
+++ b/spring-context/src/main/java/org/springframework/scheduling/annotation/Scheduled.java
@@ -136,9 +136,12 @@ public @interface Scheduled {
 	 * last invocation and the start of the next.
 	 * <p>The time unit is milliseconds by default but can be overridden via
 	 * {@link #timeUnit}.
+	 * <p>This attribute variant supports Spring-style "${...}" placeholders
+	 * as well as SpEL expressions.
 	 * @return the delay as a String value &mdash; for example, a placeholder
 	 * or a {@link java.time.Duration#parse java.time.Duration} compliant value
 	 * @since 3.2.2
+	 * @see #fixedDelay()
 	 */
 	String fixedDelayString() default "";
 
@@ -154,9 +157,12 @@ public @interface Scheduled {
 	 * Execute the annotated method with a fixed period between invocations.
 	 * <p>The time unit is milliseconds by default but can be overridden via
 	 * {@link #timeUnit}.
+	 * <p>This attribute variant supports Spring-style "${...}" placeholders
+	 * as well as SpEL expressions.
 	 * @return the period as a String value &mdash; for example, a placeholder
 	 * or a {@link java.time.Duration#parse java.time.Duration} compliant value
 	 * @since 3.2.2
+	 * @see #fixedRate()
 	 */
 	String fixedRateString() default "";
 
@@ -175,9 +181,12 @@ public @interface Scheduled {
 	 * {@link #fixedRate} or {@link #fixedDelay} task.
 	 * <p>The time unit is milliseconds by default but can be overridden via
 	 * {@link #timeUnit}.
+	 * <p>This attribute variant supports Spring-style "${...}" placeholders
+	 * as well as SpEL expressions.
 	 * @return the initial delay as a String value &mdash; for example, a placeholder
 	 * or a {@link java.time.Duration#parse java.time.Duration} compliant value
 	 * @since 3.2.2
+	 * @see #initialDelay()
 	 */
 	String initialDelayString() default "";
 
diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/MvcUriComponentsBuilder.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/MvcUriComponentsBuilder.java
index 46c3ab1543..5086cf055e 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/MvcUriComponentsBuilder.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/MvcUriComponentsBuilder.java
@@ -780,11 +780,24 @@ public class MvcUriComponentsBuilder {
 
 			else if (controllerType.isInterface()) {
 				ClassLoader classLoader = controllerType.getClassLoader();
-				if (classLoader == null || classLoader.getParent() == null) {
-					// JDK interface type from bootstrap loader or platform loader ->
-					// use higher-level loader which can see Spring infrastructure classes
+				if (classLoader == null) {
+					// JDK bootstrap loader -> use MethodInvocationInfo ClassLoader instead.
 					classLoader = MethodInvocationInfo.class.getClassLoader();
 				}
+				else if (classLoader.getParent() == null) {
+					// Potentially the JDK platform loader on JDK 9+
+					ClassLoader miiClassLoader = MethodInvocationInfo.class.getClassLoader();
+					ClassLoader miiParent = miiClassLoader.getParent();
+					while (miiParent != null) {
+						if (classLoader == miiParent) {
+							// Suggested ClassLoader is ancestor of MethodInvocationInfo ClassLoader
+							// -> use MethodInvocationInfo ClassLoader itself instead.
+							classLoader = miiClassLoader;
+							break;
+						}
+						miiParent = miiParent.getParent();
+					}
+				}
 				Class<?>[] ifcs = new Class<?>[] {controllerType, MethodInvocationInfo.class};
 				return (T) Proxy.newProxyInstance(classLoader, ifcs, interceptor);
 			}