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Java 返回一个由pojo属性名称组成的alpha排序字符串数组。
返回一个由pojo属性名称组成的alpha排序字符串数组。
实例源码：
源代码：
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/**3
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* Helios, OpenSource Monitoring5
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* Brought to you by the Helios Development Group7
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*9
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* Copyright 2007, Helios Development Group and individual contributors11
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* as indicated by the @author tags. See the copyright.txt file in the13
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* distribution for a full listing of individual contributors.15
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*17
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* This is free software; you can redistribute it and/or modify it19
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* under the terms of the GNU Lesser General Public License as21
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* published by the Free Software Foundation; either version 2.1 of23
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* the License, or (at your option) any later version.25
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*27
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* This software is distributed in the hope that it will be useful,29
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* but WITHOUT ANY WARRANTY; without even the implied warranty of31
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU33
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* Lesser General Public License for more details.35
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*37
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* You should have received a copy of the GNU Lesser General Public39
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* License along with this software; if not, write to the Free41
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA43
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org. 45
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*47
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*/49
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//package com.nowjava;51
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import java.beans.*;53
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/** 55
来 自 56
n o w j a v a . c o m57
**/58
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import java.util.ArrayList;60
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import java.util.Collections;62
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import java.util.List;64
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public class Main {67
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public static void main(String[] argv) throws Exception {69
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Object pojo = "nowjava.com";71
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System.out.println(java.util.Arrays73
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.toString(getPojoAttributeTypes(pojo)));75
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}77
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/**80
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* Returns an alpha sorted string array of a pojo's attribute names.82
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* @param pojo84
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* @return A string array of attribute names.86
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*/88
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public static String[] getPojoAttributeTypes(Object pojo) {90
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List<String> list = new ArrayList<String>();92
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for (PropertyDescriptor pd : getPropertyDescriptors(pojo)) {94
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if (pd.getReadMethod() != null) {96
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list.add(pd.getReadMethod().getReturnType().getName());98
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} else {/** n o w j a v a . c o m 提供 **/100
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list.add(pd.getWriteMethod().getReturnType().getName());102
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}104
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}106
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Collections.sort(list);108
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return list.toArray(new String[list.size()]);110
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}112
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/**115
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* Returns a list of a pojo's <code>PropertyDescriptor</code>s minus the same for <code>java.lang.Object</code>.117
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* @param pojo119
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* @return A list of <code>PropertyDescriptor</code>s.121
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*/123
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public static List<PropertyDescriptor> getPropertyDescriptors(125
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Object pojo) {127
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List<PropertyDescriptor> list = getAllPropertyDescriptors(pojo);129
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List<PropertyDescriptor> objList = getAllPropertyDescriptors(new Object());131
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list.removeAll(objList);133
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return list;135
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}137
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/**140
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* Returns a list of all of a pojo's <code>PropertyDescriptor</code>s142
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* @param pojo144
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* @return A list of <code>PropertyDescriptor</code>s.146
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*/148
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public static List<PropertyDescriptor> getAllPropertyDescriptors(150
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