diff --git a/spring-tx/src/main/java/org/springframework/transaction/jta/WebLogicJtaTransactionManager.java b/spring-tx/src/main/java/org/springframework/transaction/jta/WebLogicJtaTransactionManager.java
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+/*
+ * Copyright 2002-present 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.transaction.jta;
+
+import java.io.Serializable;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import jakarta.transaction.InvalidTransactionException;
+import jakarta.transaction.NotSupportedException;
+import jakarta.transaction.SystemException;
+import jakarta.transaction.Transaction;
+import jakarta.transaction.TransactionManager;
+import jakarta.transaction.UserTransaction;
+
+import org.springframework.lang.Nullable;
+import org.springframework.transaction.TransactionDefinition;
+import org.springframework.transaction.TransactionSystemException;
+import org.springframework.util.Assert;
+
+/**
+ * Special {@link JtaTransactionManager} variant for Oracle WebLogic 15.1.1 and higher.
+ * Supports the full power of Spring's transaction definitions on WebLogic's
+ * transaction coordinator, <i>beyond standard JTA</i>: transaction names,
+ * per-transaction isolation levels, and proper resuming of transactions in all cases.
+ *
+ * <p>Uses WebLogic's special {@code begin(name)} method to start a JTA transaction,
+ * in order to make <b>Spring-driven transactions visible in WebLogic's transaction
+ * monitor</b>. In case of Spring's declarative transactions, the exposed name will
+ * (by default) be the fully-qualified class name + "." + method name.
+ *
+ * <p>Supports a <b>per-transaction isolation level</b> through WebLogic's corresponding
+ * JTA transaction property "ISOLATION LEVEL". This will apply the specified isolation
+ * level (e.g. ISOLATION_SERIALIZABLE) to all JDBC Connections that participate in the
+ * given transaction.
+ *
+ * <p>Invokes WebLogic's special {@code forceResume} method if standard JTA resume
+ * failed, to <b>also resume if the target transaction was marked rollback-only</b>.
+ * If you're not relying on this feature of transaction suspension in the first
+ * place, Spring's standard JtaTransactionManager will behave properly too.
+ *
+ * <p>By default, the JTA UserTransaction and TransactionManager handles are
+ * fetched directly from WebLogic's {@code TransactionHelper}. This can be
+ * overridden by specifying "userTransaction"/"userTransactionName" and
+ * "transactionManager"/"transactionManagerName", passing in existing handles
+ * or specifying corresponding JNDI locations to look up.
+ *
+ * <p>Note: This class was initially removed as of Spring Framework 6.0 but then
+ * brought back after the WebLogic 15.1.1 release which finally delivers Jakarta EE 9
+ * compatibility. As of Spring Framework 6.2.16, it is available again for manual
+ * configuration - as a replacement for the standard {@link JtaTransactionManager}.
+ *
+ * @author Juergen Hoeller
+ * @since 6.2.16
+ * @see org.springframework.transaction.TransactionDefinition#getName()
+ * @see org.springframework.transaction.TransactionDefinition#getIsolationLevel()
+ */
+@SuppressWarnings("serial")
+public class WebLogicJtaTransactionManager extends JtaTransactionManager {
+
+	private static final String USER_TRANSACTION_CLASS_NAME = "weblogic.transaction.UserTransaction";
+
+	private static final String CLIENT_TRANSACTION_MANAGER_CLASS_NAME = "weblogic.transaction.ClientTransactionManager";
+
+	private static final String TRANSACTION_CLASS_NAME = "weblogic.transaction.Transaction";
+
+	private static final String TRANSACTION_HELPER_CLASS_NAME = "weblogic.transaction.TransactionHelper";
+
+	private static final String ISOLATION_LEVEL_KEY = "ISOLATION LEVEL";
+
+
+	private boolean weblogicUserTransactionAvailable;
+
+	@Nullable
+	private Method beginWithNameMethod;
+
+	@Nullable
+	private Method beginWithNameAndTimeoutMethod;
+
+	private boolean weblogicTransactionManagerAvailable;
+
+	@Nullable
+	private Method forceResumeMethod;
+
+	@Nullable
+	private Method setPropertyMethod;
+
+	@Nullable
+	private Object transactionHelper;
+
+
+	@Override
+	public void afterPropertiesSet() throws TransactionSystemException {
+		super.afterPropertiesSet();
+		loadWebLogicTransactionClasses();
+	}
+
+	@Override
+	@Nullable
+	protected UserTransaction retrieveUserTransaction() throws TransactionSystemException {
+		Object helper = loadWebLogicTransactionHelper();
+		try {
+			logger.trace("Retrieving JTA UserTransaction from WebLogic TransactionHelper");
+			Method getUserTransactionMethod = helper.getClass().getMethod("getUserTransaction");
+			return (UserTransaction) getUserTransactionMethod.invoke(this.transactionHelper);
+		}
+		catch (InvocationTargetException ex) {
+			throw new TransactionSystemException(
+					"WebLogic's TransactionHelper.getUserTransaction() method failed", ex.getTargetException());
+		}
+		catch (Exception ex) {
+			throw new TransactionSystemException(
+					"Could not invoke WebLogic's TransactionHelper.getUserTransaction() method", ex);
+		}
+	}
+
+	@Override
+	@Nullable
+	protected TransactionManager retrieveTransactionManager() throws TransactionSystemException {
+		Object helper = loadWebLogicTransactionHelper();
+		try {
+			logger.trace("Retrieving JTA TransactionManager from WebLogic TransactionHelper");
+			Method getTransactionManagerMethod = helper.getClass().getMethod("getTransactionManager");
+			return (TransactionManager) getTransactionManagerMethod.invoke(this.transactionHelper);
+		}
+		catch (InvocationTargetException ex) {
+			throw new TransactionSystemException(
+					"WebLogic's TransactionHelper.getTransactionManager() method failed", ex.getTargetException());
+		}
+		catch (Exception ex) {
+			throw new TransactionSystemException(
+					"Could not invoke WebLogic's TransactionHelper.getTransactionManager() method", ex);
+		}
+	}
+
+	private Object loadWebLogicTransactionHelper() throws TransactionSystemException {
+		Object helper = this.transactionHelper;
+		if (helper == null) {
+			try {
+				Class<?> transactionHelperClass = getClass().getClassLoader().loadClass(TRANSACTION_HELPER_CLASS_NAME);
+				Method getTransactionHelperMethod = transactionHelperClass.getMethod("getTransactionHelper");
+				helper = getTransactionHelperMethod.invoke(null);
+				this.transactionHelper = helper;
+				logger.trace("WebLogic TransactionHelper found");
+			}
+			catch (InvocationTargetException ex) {
+				throw new TransactionSystemException(
+						"WebLogic's TransactionHelper.getTransactionHelper() method failed", ex.getTargetException());
+			}
+			catch (Exception ex) {
+				throw new TransactionSystemException(
+						"Could not initialize WebLogicJtaTransactionManager because WebLogic API classes are not available",
+						ex);
+			}
+		}
+		return helper;
+	}
+
+	private void loadWebLogicTransactionClasses() throws TransactionSystemException {
+		try {
+			Class<?> userTransactionClass = getClass().getClassLoader().loadClass(USER_TRANSACTION_CLASS_NAME);
+			this.weblogicUserTransactionAvailable = userTransactionClass.isInstance(getUserTransaction());
+			if (this.weblogicUserTransactionAvailable) {
+				this.beginWithNameMethod = userTransactionClass.getMethod("begin", String.class);
+				this.beginWithNameAndTimeoutMethod = userTransactionClass.getMethod("begin", String.class, int.class);
+				logger.debug("Support for WebLogic transaction names available");
+			}
+			else {
+				logger.debug("Support for WebLogic transaction names not available");
+			}
+
+			// Obtain WebLogic ClientTransactionManager interface.
+			Class<?> transactionManagerClass =
+					getClass().getClassLoader().loadClass(CLIENT_TRANSACTION_MANAGER_CLASS_NAME);
+			logger.trace("WebLogic ClientTransactionManager found");
+
+			this.weblogicTransactionManagerAvailable = transactionManagerClass.isInstance(getTransactionManager());
+			if (this.weblogicTransactionManagerAvailable) {
+				Class<?> transactionClass = getClass().getClassLoader().loadClass(TRANSACTION_CLASS_NAME);
+				this.forceResumeMethod = transactionManagerClass.getMethod("forceResume", Transaction.class);
+				this.setPropertyMethod = transactionClass.getMethod("setProperty", String.class, Serializable.class);
+				logger.debug("Support for WebLogic forceResume available");
+			}
+			else {
+				logger.debug("Support for WebLogic forceResume not available");
+			}
+		}
+		catch (Exception ex) {
+			throw new TransactionSystemException(
+					"Could not initialize WebLogicJtaTransactionManager because WebLogic API classes are not available",
+					ex);
+		}
+	}
+
+	private TransactionManager obtainTransactionManager() {
+		TransactionManager tm = getTransactionManager();
+		Assert.state(tm != null, "No TransactionManager set");
+		return tm;
+	}
+
+
+	@Override
+	protected void doJtaBegin(JtaTransactionObject txObject, TransactionDefinition definition)
+			throws NotSupportedException, SystemException {
+
+		int timeout = determineTimeout(definition);
+
+		// Apply transaction name (if any) to WebLogic transaction.
+		if (this.weblogicUserTransactionAvailable && definition.getName() != null) {
+			try {
+				if (timeout > TransactionDefinition.TIMEOUT_DEFAULT) {
+					/*
+					weblogic.transaction.UserTransaction wut = (weblogic.transaction.UserTransaction) ut;
+					wut.begin(definition.getName(), timeout);
+					*/
+					Assert.state(this.beginWithNameAndTimeoutMethod != null, "WebLogic JTA API not initialized");
+					this.beginWithNameAndTimeoutMethod.invoke(txObject.getUserTransaction(), definition.getName(), timeout);
+				}
+				else {
+					/*
+					weblogic.transaction.UserTransaction wut = (weblogic.transaction.UserTransaction) ut;
+					wut.begin(definition.getName());
+					*/
+					Assert.state(this.beginWithNameMethod != null, "WebLogic JTA API not initialized");
+					this.beginWithNameMethod.invoke(txObject.getUserTransaction(), definition.getName());
+				}
+			}
+			catch (InvocationTargetException ex) {
+				throw new TransactionSystemException(
+						"WebLogic's UserTransaction.begin() method failed", ex.getTargetException());
+			}
+			catch (Exception ex) {
+				throw new TransactionSystemException(
+						"Could not invoke WebLogic's UserTransaction.begin() method", ex);
+			}
+		}
+		else {
+			// No WebLogic UserTransaction available or no transaction name specified
+			// -> standard JTA begin call.
+			applyTimeout(txObject, timeout);
+			txObject.getUserTransaction().begin();
+		}
+
+		// Specify isolation level, if any, through corresponding WebLogic transaction property.
+		if (this.weblogicTransactionManagerAvailable) {
+			if (definition.getIsolationLevel() != TransactionDefinition.ISOLATION_DEFAULT) {
+				try {
+					Transaction tx = obtainTransactionManager().getTransaction();
+					Integer isolationLevel = definition.getIsolationLevel();
+					/*
+					weblogic.transaction.Transaction wtx = (weblogic.transaction.Transaction) tx;
+					wtx.setProperty(ISOLATION_LEVEL_KEY, isolationLevel);
+					*/
+					Assert.state(this.setPropertyMethod != null, "WebLogic JTA API not initialized");
+					this.setPropertyMethod.invoke(tx, ISOLATION_LEVEL_KEY, isolationLevel);
+				}
+				catch (InvocationTargetException ex) {
+					throw new TransactionSystemException(
+							"WebLogic's Transaction.setProperty(String, Serializable) method failed", ex.getTargetException());
+				}
+				catch (Exception ex) {
+					throw new TransactionSystemException(
+							"Could not invoke WebLogic's Transaction.setProperty(String, Serializable) method", ex);
+				}
+			}
+		}
+		else {
+			applyIsolationLevel(txObject, definition.getIsolationLevel());
+		}
+	}
+
+	@Override
+	protected void doJtaResume(@Nullable JtaTransactionObject txObject, Object suspendedTransaction)
+			throws InvalidTransactionException, SystemException {
+
+		try {
+			obtainTransactionManager().resume((Transaction) suspendedTransaction);
+		}
+		catch (InvalidTransactionException ex) {
+			if (!this.weblogicTransactionManagerAvailable) {
+				throw ex;
+			}
+
+			if (logger.isDebugEnabled()) {
+				logger.debug("Standard JTA resume threw InvalidTransactionException: " + ex.getMessage() +
+					" - trying WebLogic JTA forceResume");
+			}
+			/*
+			weblogic.transaction.TransactionManager wtm =
+					(weblogic.transaction.TransactionManager) getTransactionManager();
+			wtm.forceResume(suspendedTransaction);
+			*/
+			try {
+				Assert.state(this.forceResumeMethod != null, "WebLogic JTA API not initialized");
+				this.forceResumeMethod.invoke(getTransactionManager(), suspendedTransaction);
+			}
+			catch (InvocationTargetException ex2) {
+				throw new TransactionSystemException(
+						"WebLogic's TransactionManager.forceResume(Transaction) method failed", ex2.getTargetException());
+			}
+			catch (Exception ex2) {
+				throw new TransactionSystemException(
+						"Could not access WebLogic's TransactionManager.forceResume(Transaction) method", ex2);
+			}
+		}
+	}
+
+	@Override
+	public Transaction createTransaction(@Nullable String name, int timeout) throws NotSupportedException, SystemException {
+		if (this.weblogicUserTransactionAvailable && name != null) {
+			try {
+				if (timeout >= 0) {
+					Assert.state(this.beginWithNameAndTimeoutMethod != null, "WebLogic JTA API not initialized");
+					this.beginWithNameAndTimeoutMethod.invoke(getUserTransaction(), name, timeout);
+				}
+				else {
+					Assert.state(this.beginWithNameMethod != null, "WebLogic JTA API not initialized");
+					this.beginWithNameMethod.invoke(getUserTransaction(), name);
+				}
+			}
+			catch (InvocationTargetException ex) {
+				if (ex.getTargetException() instanceof NotSupportedException) {
+					throw (NotSupportedException) ex.getTargetException();
+				}
+				else if (ex.getTargetException() instanceof SystemException) {
+					throw (SystemException) ex.getTargetException();
+				}
+				else if (ex.getTargetException() instanceof RuntimeException) {
+					throw (RuntimeException) ex.getTargetException();
+				}
+				else {
+					throw new SystemException(
+							"WebLogic's begin() method failed with an unexpected error: " + ex.getTargetException());
+				}
+			}
+			catch (Exception ex) {
+				throw new SystemException("Could not invoke WebLogic's UserTransaction.begin() method: " + ex);
+			}
+			return new ManagedTransactionAdapter(obtainTransactionManager());
+		}
+
+		else {
+			// No name specified - standard JTA is sufficient.
+			return super.createTransaction(name, timeout);
+		}
+	}
+
+}