fix: Fix PathMatchingResourcePatternResolver to handle absolute paths in JAR manifests

When JAR manifest Class-Path entries contain absolute paths (as Gradle
creates on Windows for long classpaths), PathMatchingResourcePatternResolver
incorrectly rejected them.

Fixes #35730

Author: Artur-

spring-core/src/main/java/org/springframework/core/io/support/PathMatchingResourcePatternResolver.java

@@ -614,6 +614,7 @@ private Set<ClassPathManifestEntry> getClassPathManifestEntries() {
 	private Set<ClassPathManifestEntry> getClassPathManifestEntriesFromJar(File jar) throws IOException {
 		URL base = jar.toURI().toURL();
 		File parent = jar.getAbsoluteFile().getParentFile();
+
 		try (JarFile jarFile = new JarFile(jar)) {
 			Manifest manifest = jarFile.getManifest();
 			Attributes attributes = (manifest != null ? manifest.getMainAttributes() : null);
@@ -623,12 +624,23 @@ private Set<ClassPathManifestEntry> getClassPathManifestEntriesFromJar(File jar)
 				StringTokenizer tokenizer = new StringTokenizer(classPath);
 				while (tokenizer.hasMoreTokens()) {
 					String path = tokenizer.nextToken();
+
 					if (path.indexOf(':') >= 0 && !"file".equalsIgnoreCase(new URL(base, path).getProtocol())) {
 						// See jdk.internal.loader.URLClassPath.JarLoader.tryResolveFile(URL, String)
 						continue;
 					}
-					File candidate = new File(parent, path);
-					if (candidate.isFile() && candidate.getCanonicalPath().contains(parent.getCanonicalPath())) {
+
+					// Handle absolute paths correctly - don't use parent for absolute paths
+					File pathFile = new File(path);
+					File candidate = pathFile.isAbsolute() ? pathFile : new File(parent, path);
+
+					// For relative paths, enforce security check (must be under parent)
+					// For absolute paths, just verify file exists (matching JVM behavior)
+					boolean isValid = pathFile.isAbsolute() ?
+							candidate.isFile() :
+							(candidate.isFile() && candidate.getCanonicalPath().contains(parent.getCanonicalPath()));
+
+					if (isValid) {
 						manifestEntries.add(ClassPathManifestEntry.of(candidate, this.useCaches));
 					}
 				}