Don't close early when SecurityManager present

Update `JarFile` and `JarFileWrapper` classes so that they no longer
close the `JarFile` early if a `SecurityManager` is in use.

Prior to this commit, the closed `JarFile` would cause (an ultimately
swallowed) NPE in `ZipFile` which manifested itself as a
`ClassNotFoundException` when starting the app.

Closes gh-25538

spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -126,7 +126,9 @@ public class JarFile extends AbstractJarFile implements Iterable<java.util.jar.J
 	private JarFile(RandomAccessDataFile rootFile, String pathFromRoot, RandomAccessData data, JarEntryFilter filter,
 			JarFileType type, Supplier<Manifest> manifestSupplier) throws IOException {
 		super(rootFile.getFile());
-		super.close();
+		if (System.getSecurityManager() == null) {
+			super.close();
+		}
 		this.rootFile = rootFile;
 		this.pathFromRoot = pathFromRoot;
 		CentralDirectoryParser parser = new CentralDirectoryParser();
@@ -137,7 +139,12 @@ public class JarFile extends AbstractJarFile implements Iterable<java.util.jar.J
 			this.data = parser.parse(data, filter == null);
 		}
 		catch (RuntimeException ex) {
-			close();
+			try {
+				this.rootFile.close();
+				super.close();
+			}
+			catch (IOException ioex) {
+			}
 			throw ex;
 		}
 		this.manifestSupplier = (manifestSupplier != null) ? manifestSupplier : () -> {
@@ -337,10 +344,11 @@ public class JarFile extends AbstractJarFile implements Iterable<java.util.jar.J
 		if (this.closed) {
 			return;
 		}
-		this.closed = true;
+		super.close();
 		if (this.type == JarFileType.DIRECT) {
 			this.rootFile.close();
 		}
+		this.closed = true;
 	}
 
 	private void ensureOpen() {

spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFileWrapper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -40,7 +40,9 @@ class JarFileWrapper extends AbstractJarFile {
 	JarFileWrapper(JarFile parent) throws IOException {
 		super(parent.getRootJarFile().getFile());
 		this.parent = parent;
-		super.close();
+		if (System.getSecurityManager() == null) {
+			super.close();
+		}
 	}
 
 	@Override