根据属性名称返回值。

/*

 * Copyright (c) 2009, Carl Dea

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. Neither the name of JFXtras nor the names of its contributors may be used

 *    to endorse or promote products derived from this software without

 *    specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * BeanUtil.java - Contains BeanUtil.

 *

 * Developed 2009 by Carl Dea

 * as a JavaFX Script SDK 1.2 to demonstrate an fxforms framework.

 * Created on Aug 13, 2009, 1:32:42 AM

 */
 /*
 N o w  J a v a  .   c o m 提 供
 */

import java.beans.BeanInfo;

import java.beans.IntrospectionException;

import java.beans.Introspector;

import java.beans.PropertyDescriptor;

import java.lang.reflect.Method;

import java.util.logging.Level;

import java.util.logging.Logger;


public class Main{

    public static void main(String[] argv) throws Exception{

        Object bean = "nowjava.com";// 来自 时 代 J a v a - nowjava.com

        String propertyName = "nowjava.com";

        System.out.println(getValue(bean,propertyName));

    }

    /**

     * Returns value based on the propertyName.

     * @param bean - Bean to be used

     * @param propertyName - Property to get

     * @return property Value

     */

    public static Object getValue(Object bean, String propertyName) {

        if (bean == null) {

            return null;

        }

        PropertyDescriptor propertyDescriptor = null;

        BeanInfo info = null;

        try {

            info = Introspector.getBeanInfo(bean.getClass());

            if (info != null) {

                for (PropertyDescriptor element : info

                        .getPropertyDescriptors()) {

                    if (propertyName.equals(element.getName())) {

                        propertyDescriptor = element;

                    }

                }

                Method getter =