Simplify if statements and replace try-finally with try-with-resources

Closes gh-23445

Author: zhuzhuman978

spring-core/src/main/java/org/springframework/util/xml/AbstractStaxXMLReader.java

@@ -64,22 +64,19 @@ abstract class AbstractStaxXMLReader extends AbstractXMLReader {
 
 	@Override
 	public boolean getFeature(String name) throws SAXNotRecognizedException, SAXNotSupportedException {
-		if (NAMESPACES_FEATURE_NAME.equals(name)) {
-			return this.namespacesFeature;
-		}
-		else if (NAMESPACE_PREFIXES_FEATURE_NAME.equals(name)) {
-			return this.namespacePrefixesFeature;
-		}
-		else if (IS_STANDALONE_FEATURE_NAME.equals(name)) {
-			if (this.isStandalone != null) {
-				return this.isStandalone;
-			}
-			else {
-				throw new SAXNotSupportedException("startDocument() callback not completed yet");
-			}
-		}
-		else {
-			return super.getFeature(name);
+		switch (name) {
+			case NAMESPACES_FEATURE_NAME:
+				return this.namespacesFeature;
+			case NAMESPACE_PREFIXES_FEATURE_NAME:
+				return this.namespacePrefixesFeature;
+			case IS_STANDALONE_FEATURE_NAME:
+				if (this.isStandalone != null) {
+					return this.isStandalone;
+				} else {
+					throw new SAXNotSupportedException("startDocument() callback not completed yet");
+				}
+			default:
+				return super.getFeature(name);
 		}
 	}
 

spring-jdbc/src/main/java/org/springframework/jdbc/datasource/DataSourceTransactionManager.java

@@ -408,13 +408,9 @@ protected void prepareTransactionalConnection(Connection con, TransactionDefinit
 			throws SQLException {
 
 		if (isEnforceReadOnly() && definition.isReadOnly()) {
-			Statement stmt = con.createStatement();
-			try {
+			try (Statement stmt = con.createStatement()) {
 				stmt.executeUpdate("SET TRANSACTION READ ONLY");
 			}
-			finally {
-				stmt.close();
-			}
 		}
 	}