Equivalent code without java.net.URL constructor in comment blocks

See gh-29486
See gh-29481

Author: jhoeller

spring-core/src/main/java/org/springframework/core/io/UrlResource.java

@@ -97,6 +97,21 @@ public UrlResource(URI uri) throws MalformedURLException {
 	 */
 	public UrlResource(String path) throws MalformedURLException {
 		Assert.notNull(path, "Path must not be null");
+
+		// Equivalent without java.net.URL constructor - for building on JDK 20+
+		/*
+		try {
+			this.uri = ResourceUtils.toURI(StringUtils.cleanPath(path));
+			this.url = this.uri.toURL();
+			this.cleanedUrl = StringUtils.cleanPath(path);
+		}
+		catch (URISyntaxException | IllegalArgumentException ex) {
+			MalformedURLException exToThrow = new MalformedURLException(ex.getMessage());
+			exToThrow.initCause(ex);
+			throw exToThrow;
+		}
+		*/
+
 		this.uri = null;
 		this.url = ResourceUtils.toURL(path);
 		this.cleanedUrl = StringUtils.cleanPath(path);

spring-core/src/main/java/org/springframework/util/ResourceUtils.java

@@ -390,13 +390,12 @@ public static URI toURI(String location) throws URISyntaxException {
 	 * @since 6.0
 	 */
 	public static URL toURL(String location) throws MalformedURLException {
-		// Not fully equivalent - but to be moved in the given direction
-		// since JDK 20 deprecates all direct java.net.URL constructors.
+		// Equivalent without java.net.URL constructor - for building on JDK 20+
 		/*
 		try {
-			return toURI(location).toURL();
+			return toURI(StringUtils.cleanPath(location)).toURL();
 		}
-		catch (URISyntaxException ex) {
+		catch (URISyntaxException | IllegalArgumentException ex) {
 			MalformedURLException exToThrow = new MalformedURLException(ex.getMessage());
 			exToThrow.initCause(ex);
 			throw exToThrow;
@@ -419,8 +418,7 @@ public static URL toRelativeURL(URL root, String relativePath) throws MalformedU
 		// # can appear in filenames, java.net.URL should not treat it as a fragment
 		relativePath = StringUtils.replace(relativePath, "#", "%23");
 
-		// Not fully equivalent - but to be moved in the given direction
-		// since JDK 20 deprecates all direct java.net.URL constructors.
+		// Equivalent without java.net.URL constructor - for building on JDK 20+
 		/*
 		return toURL(StringUtils.applyRelativePath(root.toString(), relativePath));
 		*/