Allow Archives to be closed so they can release resources

Closes gh-17126

spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/archive/Archive.java

@@ -30,7 +30,7 @@ import org.springframework.boot.loader.Launcher;
  * @author Phillip Webb
  * @see JarFileArchive
  */
-public interface Archive extends Iterable<Archive.Entry> {
+public interface Archive extends Iterable<Archive.Entry>, AutoCloseable {
 
 	/**
 	 * Returns a URL that can be used to load the archive.
@@ -54,6 +54,16 @@ public interface Archive extends Iterable<Archive.Entry> {
 	 */
 	List<Archive> getNestedArchives(EntryFilter filter) throws IOException;
 
+	/**
+	 * Closes the {@code Archive}, releasing any open resources.
+	 * @throws Exception if an error occurs during close processing
+	 * @since 2.2.0
+	 */
+	@Override
+	default void close() throws Exception {
+
+	}
+
 	/**
 	 * Represents a single entry in the archive.
 	 */

spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/archive/JarFileArchive.java

@@ -94,6 +94,11 @@ public class JarFileArchive implements Archive {
 		return new EntryIterator(this.jarFile.entries());
 	}
 
+	@Override
+	public void close() throws IOException {
+		this.jarFile.close();
+	}
+
 	protected Archive getNestedArchive(Entry entry) throws IOException {
 		JarEntry jarEntry = ((JarFileEntry) entry).getJarEntry();
 		if (jarEntry.getComment().startsWith(UNPACK_MARKER)) {