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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.common.beans;

import java.util.List;
import static com.ibatis.common.Objects.uncheckedCast;

/**
 * Abstract class used to help development of Probe implementations
 */
public abstract class BaseProbe implements Probe {

    protected abstract void setProperty(Object object, String property, Object value);

    protected abstract Object getProperty(Object object, String property);

    protected Object getIndexedProperty(Object object, String indexedName) {

        Object value = null;

        try {
            String name = indexedName.substring(0, indexedName.indexOf('['));
            int i = Integer.parseInt(indexedName.substring(indexedName.indexOf('[') + 1, indexedName.indexOf(']')));
            Object list = null;
            if (name.isEmpty()) {
                list = object;
            } else {
                list = getProperty(object, name);
            }

            if (list instanceof List) {
                value = ((List) list).get(i);
            } else if (list instanceof Object[]) {
                value = ((Object[]) list)[i];
            } else if (list instanceof char[]) {
                value = new Character(((char[]) list)[i]);
            } else if (list instanceof boolean[]) {
                value = new Boolean(((boolean[]) list)[i]);
            } else if (list instanceof byte[]) {
                value = new Byte(((byte[]) list)[i]);
            } else if (list instanceof double[]) {
                value = new Double(((double[]) list)[i]);
            } else if (list instanceof float[]) {
                value = new Float(((float[]) list)[i]);
            } else if (list instanceof int[]) {
                value = new Integer(((int[]) list)[i]);
            } else if (list instanceof long[]) {
                value = new Long(((long[]) list)[i]);
            } else if (list instanceof short[]) {
                value = new Short(((short[]) list)[i]);
                // } else if (list instanceof Iterable) { // ## sunsong
                // Iterator it = ((Iterable) list).iterator();
                // Object obj = null;
                // for (int j = 0; j <= i; j++) {
                // obj = it.next();
                // }
                // return obj;
            } else {
                String cn = object != null ? object.getClass().getName() : "null";
                throw new ProbeException(
                    "The '" + indexedName + "' property of the " + cn + " can not be retrieved");
            }

        } catch (ProbeException e) {
            throw e;
        } catch (Exception e) {
            throw new ProbeException("Error getting ordinal list from JavaBean. Cause " + e, e);
        }

        return value;
    }

    protected Class getIndexedType(Object object, String indexedName) {

        Class value = null;

        try {
            String name = indexedName.substring(0, indexedName.indexOf('['));
            int i = Integer.parseInt(indexedName.substring(indexedName.indexOf('[') + 1, indexedName.indexOf(']')));
            Object list = null;
            if (!name.isEmpty()) {
                list = getProperty(object, name);
            } else {
                list = object;
            }

            if (list instanceof List) {
                value = ((List) list).get(i).getClass();
            } else if (list instanceof Object[]) {
                value = ((Object[]) list)[i].getClass();
            } else if (list instanceof char[]) {
                value = Character.class;
            } else if (list instanceof boolean[]) {
                value = Boolean.class;
            } else if (list instanceof byte[]) {
                value = Byte.class;
            } else if (list instanceof double[]) {
                value = Double.class;
            } else if (list instanceof float[]) {
                value = Float.class;
            } else if (list instanceof int[]) {
                value = Integer.class;
            } else if (list instanceof long[]) {
                value = Long.class;
            } else if (list instanceof short[]) {
                value = Short.class;
            } else {
                throw new ProbeException("The '" + name + "' property of the " + object.getClass().getName()
                    + " class is not a List or Array.");
            }

        } catch (ProbeException e) {
            throw e;
        } catch (Exception e) {
            throw new ProbeException("Error getting ordinal list from JavaBean. Cause " + e, e);
        }

        return value;
    }

    protected void setIndexedProperty(Object object, String indexedName, Object value) {

        try {
            String name = indexedName.substring(0, indexedName.indexOf('['));
            int i = Integer.parseInt(indexedName.substring(indexedName.indexOf('[') + 1, indexedName.indexOf(']')));
            Object list = getProperty(object, name);
            if (list instanceof List) {
                List