获取所有pojo属性名称的完整列表。

/**

 * 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;

import java.beans.*;
/** 
来 自 
n o w j a   v  a . c o m - 时  代  Java
**/


import java.util.ArrayList;


import java.util.List;


public class Main {

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

        Object pojo = "nowjava.com";

        System.out.println(getPojoBeanAttributes(pojo));

    }


    /**

     * Gets a complete list of all a pojo's attribute names.

     * <code>@JMXAttribute</code> annotations are ignored.

     * @param pojo

     * @param exclude attributes defined in Object class.

     * @return A list of pojo attribute names.

     *//* from 时代Java公众号*/

    public static List<String> getPojoBeanAttributes(Object pojo,

            boolean declared) {

        BeanInfo bi = getBeanInfo(pojo);

        List<String> list = new ArrayList<String>();

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

            list.add(pd.getName());

        }

        if (pojo.getClass() != Object.class) {

            list.removeAll(getPojoBeanAttributes(new Object(), false));

        }

        return list;

    }


    /**

     * Gets a complete list of all a pojo's attribute names.

     * <code>@JMXAttribute</code> annotations are ignored.

     * Declared defaults to true.

     * @param pojo

     * @return A list of pojo attribute names.

     */

    public static List<String> getPojoBeanAttributes(Object pojo) {

        return getPojoBeanAttributes(pojo, true);

    }


    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);