Close streams when unpacking the CLI

See gh-9080

spring-boot-cli/src/it/java/org/springframework/boot/cli/infrastructure/CommandLineInvoker.java

@@ -80,20 +80,31 @@ public final class CommandLineInvoker {
 
 			})[0];
 			ZipInputStream input = new ZipInputStream(new FileInputStream(zip));
-			ZipEntry entry;
-			while ((entry = input.getNextEntry()) != null) {
-				File file = new File(unpacked, entry.getName());
-				if (entry.isDirectory()) {
-					file.mkdirs();
-				}
-				else {
-					file.getParentFile().mkdirs();
-					StreamUtils.copy(input, new FileOutputStream(file));
-					if (entry.getName().endsWith("/bin/spring")) {
-						file.setExecutable(true);
+			try {
+				ZipEntry entry;
+				while ((entry = input.getNextEntry()) != null) {
+					File file = new File(unpacked, entry.getName());
+					if (entry.isDirectory()) {
+						file.mkdirs();
+					}
+					else {
+						file.getParentFile().mkdirs();
+						FileOutputStream output = new FileOutputStream(file);
+						try {
+							StreamUtils.copy(input, output);
+							if (entry.getName().endsWith("/bin/spring")) {
+								file.setExecutable(true);
+							}
+						}
+						finally {
+							output.close();
+						}
 					}
 				}
 			}
+			finally {
+				input.close();
+			}
 		}
 		File bin = new File(unpacked.listFiles()[0], "bin");
 		File launchScript = new File(bin, isWindows() ? "spring.bat" : "spring");