From 88745820d32398a0965cc48ed4e5b8629ead6f49 Mon Sep 17 00:00:00 2001
From: Andy Wilkinson <andy.wilkinson@broadcom.com>
Date: Wed, 26 Feb 2025 12:38:30 +0000
Subject: [PATCH] Close InputStream after reading banner resource

Fixes gh-44441
---
 .../main/java/org/springframework/boot/ResourceBanner.java   | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/ResourceBanner.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/ResourceBanner.java
index 4164f92bd2..5ed5bfe7c7 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/ResourceBanner.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/ResourceBanner.java
@@ -16,6 +16,7 @@
 
 package org.springframework.boot;
 
+import java.io.InputStream;
 import java.io.PrintStream;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
@@ -63,8 +64,8 @@ public class ResourceBanner implements Banner {
 
 	@Override
 	public void printBanner(Environment environment, Class<?> sourceClass, PrintStream out) {
-		try {
-			String banner = StreamUtils.copyToString(this.resource.getInputStream(),
+		try (InputStream input = this.resource.getInputStream()) {
+			String banner = StreamUtils.copyToString(input,
 					environment.getProperty("spring.banner.charset", Charset.class, StandardCharsets.UTF_8));
 			for (PropertyResolver resolver : getPropertyResolvers(environment, sourceClass)) {
 				banner = resolver.resolvePlaceholders(banner);