在所传递的类中找到所传递名称的PropertyDescriptor。

/**

 * Helios, OpenSource Monitoring

 * Brought to you by the Helios Development Group

 *

 * Copyright 2007, Helios Development Group and individual contributors

 * as indicated by the @author tags. See the copyright.txt file in the

 * distribution for a full listing of individual contributors.

 *

 * This is free software; you can redistribute it and/or modify it

 * under the terms of the GNU Lesser General Public License as

 * published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * This software is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this software; if not, write to the Free

 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA

 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 

 *

 */

//package com.nowjava;
/*来自 
 时代Java公众号 - nowjava.com*/

import java.beans.*;


import java.util.ArrayList;


import java.util.List;


public class Main {

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

        Class targetType = String.class;

        String name = "nowjava.com";

        System.out.println(getPropertyDescriptor(targetType, name));/*来自 nowjava.com - 时代Java*/

    }


    /**

     * Locates the PropertyDescriptor for the passed name in the passed class.

     * @param targetType

     * @param name

     * @return A PropertyDescriptor

     */

    public static PropertyDescriptor getPropertyDescriptor(

            Class<?> targetType, String name) {

        String dName = Introspector.decapitalize(name);

        try {

            BeanInfo bi = Introspector.getBeanInfo(targetType);

            for (PropertyDescriptor pd : bi.getPropertyDescriptors()) {

                if (pd.getName().equals(dName)) {

                    return pd;

                }

            }

            throw new Exception("No PropertyDescriptor found for " + name);

        } catch (Exception e) {

            throw new RuntimeException(

                    "Failed to Acquire PropertyDescriptor for ["

                            + targetType.getName() + "/" + name + "]", e);

        }


    }


    public static BeanInfo getBeanInfo(Object pojo) {

        try {

            return Introspector.getBeanInfo(pojo.getClass());

        } catch (Exception e) {

            throw new RuntimeException("Failed to create bean info", e);

        }

    }


    /**

     * Returns a list of a pojo's <code>PropertyDescriptor</code>s minus the same for <code>java.lang.Object</code>.

     * @param pojo

     * @return A list of <code>PropertyDescriptor</code>s.

     */

    public static List<PropertyDescriptor> getPropertyDescriptors(

            Object pojo) {

        List<PropertyDescriptor> list = getAllPropertyDescriptors(pojo);

        List<PropertyDescriptor> objList = getAllPropertyDescriptors(new Object());

        list.removeAll(objList);