From 8c93d2e8a78531897fb4720573c0251e0f84d836 Mon Sep 17 00:00:00 2001
From: aoyvx <1580319665@qq.com>
Date: Tue, 26 Jul 2022 22:31:25 +0800
Subject: [PATCH] Ensure PROTOCOL_HANDLER system property is reset

See gh-31870
---
 .../java/org/springframework/boot/loader/jar/Handler.java     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/Handler.java b/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/Handler.java
index fad95b607e44..25037d15dafc 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/Handler.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/Handler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -413,7 +413,7 @@ static void addToRootFileCache(File sourceFile, JarFile jarFile) {
 	 */
 	static void captureJarContextUrl() {
 		if (canResetCachedUrlHandlers()) {
-			String handlers = System.getProperty(PROTOCOL_HANDLER, "");
+			String handlers = System.getProperty(PROTOCOL_HANDLER);
 			try {
 				System.clearProperty(PROTOCOL_HANDLER);
 				try {