返回一个由pojo属性名称组成的alpha排序字符串数组。

/**

 * 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
**/

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;


public class Main {

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

        Object pojo = "nowjava.com";

        System.out.println(java.util.Arrays

                .toString(getPojoAttributeTypes(pojo)));

    }


    /**

     * Returns an alpha sorted string array of a pojo's attribute names.

     * @param pojo

     * @return A string array of attribute names.

     */

    public static String[] getPojoAttributeTypes(Object pojo) {

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

        for (PropertyDescriptor pd : getPropertyDescriptors(pojo)) {

            if (pd.getReadMethod() != null) {

                list.add(pd.getReadMethod().getReturnType().getName());

            } else {/** n  o  w  j  a  v  a . c o m 提供 **/

                list.add(pd.getWriteMethod().getReturnType().getName());

            }

        }

        Collections.sort(list);

        return list.toArray(new String[list.size()]);

    }


    /**

     * 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);

        return list;

    }


    /**

     * Returns a list of all of a pojo's <code>PropertyDescriptor</code>s

     * @param pojo

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

     */

    public static List<PropertyDescriptor> getAllPropertyDescriptors(

            Object pojo) {

        List<PropertyDescriptor> list = new ArrayList<