从传递的字符串构造具有传递的类名称的对象。

/**

 * 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. 

 *

 */

import java.beans.*;/** 来自 时 代 J a v a 公 众 号**/

import java.lang.reflect.Array;

import java.lang.reflect.Constructor;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;


public class Main{

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

        String targetClassName = "nowjava.com";

        String value = "nowjava.com";

        System.out.println(stringToObject(targetClassName,value));

    }

    /**

     * Constructs an object of the passed class name from the passed string.

     * @param targetClassName The class name of the object to be created.

     * @param value The string to be used to construct the return object.

     * @return The constructed object.

     */

    public static Object stringToObject(String targetClassName, String value) {

        Object object = null;

        String arrayType = null;

        String[] arrayElements = null;

        Object convertedArrayElement = null;

        Object returnArray = null;

        Class<?> arrayClass = null;/**来自 时   代     Java  公  众  号 - nowjava.com**/

        try {

            if (targetClassName.startsWith("[L")

                    && targetClassName.endsWith(";")) {

                arrayType = targetClassName.replace("[L", "");

                arrayType = arrayType.replace(";", "");

                arrayClass = Class.forName(targetClassName, false,

                        BeanHelper.class.getClassLoader())

                        .getComponentType();


                arrayElements = value.split(",");

                returnArray = Array.newInstance(arrayClass,

                        arrayElements.length);

                int index = 0;

                for (String s : arrayElements) {

                    convertedArrayElement = stringToObject(arrayType, s);

                    Array.set(returnArray, index, convertedArrayElement);

                    index++;

                }

                object = returnArray;

            } else if ("java.lang.String".equals(targetClassName)

                    || "java.lang.Object".equals(targetClassName)) {

                object = value;

            } else if ("java.lang.Boolean".equals(targetClassName)

                    || "boolean".equals(targetClassName)) {

                object = Boolean.valueOf(value);

            } else if ("java.lang.Byte".equals(targetClassName)

                    || "byte".equals(targetClassName)) {

                object = new Byte(value);

            } else if ("java.lang.Character".equals(targetClassName)

                    || "char".equals(targetClassName)) {

                object = Character.valueOf(value.charAt(0));

            } else if ("java.lang.Class".equals(targetClassName)) {

                object = Class.forName(value);

            } else if ("java.lang.Double".equals(targetClassName)

                    || "double".equals(targetClassName)) {

                object = new Double(value);

            } else if ("java.lang.Float".equals(targetClassName)

                    || "float".equals(targetClassName)) {

                object = new Float(value);

            } else if ("java.lang.Integer".equals(targetClassName)

                    || "int".equals(targetClassName)) {

                object = new Integer(value);

            } else