From a2f5e1254e3ccf190ec559492a33ca87c47e54d3 Mon Sep 17 00:00:00 2001
From: Juergen Hoeller <jhoeller@pivotal.io>
Date: Thu, 26 Oct 2017 15:28:27 +0200
Subject: [PATCH] Drive letter case alignment in addClassPathManifestEntries

Issue: SPR-16117
---
 .../core/io/support/PathMatchingResourcePatternResolver.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/spring-core/src/main/java/org/springframework/core/io/support/PathMatchingResourcePatternResolver.java b/spring-core/src/main/java/org/springframework/core/io/support/PathMatchingResourcePatternResolver.java
index a485a5b10f..4d198678eb 100644
--- a/spring-core/src/main/java/org/springframework/core/io/support/PathMatchingResourcePatternResolver.java
+++ b/spring-core/src/main/java/org/springframework/core/io/support/PathMatchingResourcePatternResolver.java
@@ -424,6 +424,11 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
 					javaClassPathProperty, System.getProperty("path.separator"))) {
 				try {
 					String filePath = new File(path).getAbsolutePath();
+					int prefixIndex = filePath.indexOf(':');
+					if (prefixIndex == 1) {
+						// Possibly "c:" drive prefix on Windows, to be upper-cased for proper duplicate detection
+						filePath = filePath.substring(0, 1).toUpperCase() + filePath.substring(1);
+					}
 					UrlResource jarResource = new UrlResource(ResourceUtils.JAR_URL_PREFIX +
 							ResourceUtils.FILE_URL_PREFIX + filePath + ResourceUtils.JAR_URL_SEPARATOR);
 					// Potentially overlapping with URLClassLoader.getURLs() result above!