Polish "Use try-with-resources to close resources automatically"

- Apply code formatting
- Use try-with-resources in many other places that were missed in the
  pull request

Closes gh-8045

spring-boot-samples/spring-boot-sample-integration/src/test/java/sample/integration/consumer/SampleIntegrationApplicationTests.java

@@ -97,14 +97,10 @@ public class SampleIntegrationApplicationTests {
 						}
 						StringBuilder builder = new StringBuilder();
 						for (Resource resource : resources) {
-							InputStream inputStream = resource.getInputStream();
-							try {
+							try (InputStream inputStream = resource.getInputStream()) {
 								builder.append(new String(
 										StreamUtils.copyToByteArray(inputStream)));
 							}
-							finally {
-								inputStream.close();
-							}
 						}
 						return builder.toString();
 					}