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The jBATIS persistence framework will help you to significantly reduce the amount of Java code that you normally need to access a relational database. iBATIS simply maps JavaBeans to SQL statements using a very simple XML descriptor.
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/*
 *  Copyright 2004 Clinton Begin
 *
 *  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
 *
 *      http://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 com.ibatis.sqlmap.engine.transaction;

import com.ibatis.sqlmap.engine.scope.SessionScope;

import java.sql.SQLException;

public class TransactionManager {

    private TransactionConfig config;

    public TransactionManager(TransactionConfig transactionConfig) {
        this.config = transactionConfig;
    }

    public void begin(SessionScope sessionScope) throws SQLException, TransactionException {
        begin(sessionScope, IsolationLevel.UNSET_ISOLATION_LEVEL);
    }

    public void begin(SessionScope sessionScope, int transactionIsolation) throws SQLException, TransactionException {
        Transaction trans = sessionScope.getTransaction();
        TransactionState state = sessionScope.getTransactionState();
        if (state == TransactionState.STATE_STARTED) {
            throw new TransactionException("TransactionManager could not start a new transaction.  "
                + "A transaction is already started.");
        } else if (state == TransactionState.STATE_USER_PROVIDED) {
            throw new TransactionException("TransactionManager could not start a new transaction.  "
                + "A user provided connection is currently being used by this session.  "
                + "The calling .setUserConnection (null) will clear the user provided transaction.");
        }

        trans = config.newTransaction(transactionIsolation);
        sessionScope.setCommitRequired(false);

        sessionScope.setTransaction(trans);
        sessionScope.setTransactionState(TransactionState.STATE_STARTED);
    }

    public void commit(SessionScope sessionScope) throws SQLException, TransactionException {
        Transaction trans = sessionScope.getTransaction();
        TransactionState state = sessionScope.getTransactionState();
        if (state == TransactionState.STATE_USER_PROVIDED) {
            throw new TransactionException("TransactionManager could not commit.  "
                + "A user provided connection is currently being used by this session.  "
                + "You must call the commit() method of the Connection directly.  "
                + "The calling .setUserConnection (null) will clear the user provided transaction.");
        } else if (state != TransactionState.STATE_STARTED && state != TransactionState.STATE_COMMITTED) {
            throw new TransactionException("TransactionManager could not commit.  No transaction is started.");
        }
        if (sessionScope.isCommitRequired() || config.isForceCommit()) {
            trans.commit();
            sessionScope.setCommitRequired(false);
        }
        sessionScope.setTransactionState(TransactionState.STATE_COMMITTED);
    }

    public void end(SessionScope sessionScope) throws SQLException, TransactionException {
        Transaction trans = sessionScope.getTransaction();
        TransactionState state = sessionScope.getTransactionState();

        if (state == TransactionState.STATE_USER_PROVIDED) {
            throw new TransactionException("TransactionManager could not end this transaction.  "
                + "A user provided connection is currently being used by this session.  "
                + "You must call the rollback() method of the Connection directly.  "
                + "The calling .setUserConnection (null) will clear the user provided transaction.");
        }

        try {
            if (trans != null) {
                try {
                    if (state != TransactionState.STATE_COMMITTED) {
                        if (sessionScope.isCommitRequired() || config.isForceCommit()) {
                            trans.rollback();
                            sessionScope.setCommitRequired(false);
                        }
                    }
                } finally {
                    sessionScope.cleanup();
                    trans.close();
                }
            }
        } finally {
            sessionScope.setTransaction(null);
            sessionScope.setTransactionState(TransactionState.STATE_ENDED);
        }
    }

    public TransactionConfig getConfig() {
        return config;
    }

}