将目录或jar附加到系统类加载器。

/*

 Copyright (C) 2015 Electronic Arts Inc.  All rights reserved.


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 modification, are permitted provided that the following conditions

 are met:


 1.  Redistributions of source code must retain the above copyright

     notice, this list of conditions and the following disclaimer.

 2.  Redistributions in binary form must reproduce the above copyright

     notice, this list of conditions and the following disclaimer in the

     documentation and/or other materials provided with the distribution.

 3.  Neither the name of Electronic Arts, Inc. ("EA") nor the names of

     its contributors may be used to endorse or promote products derived

     from this software without specific prior written permission.


 THIS SOFTWARE IS PROVIDED BY ELECTRONIC ARTS AND ITS CONTRIBUTORS "AS IS" AND ANY

 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 DISCLAIMED. IN NO EVENT SHALL ELECTRONIC ARTS OR ITS CONTRIBUTORS BE LIABLE FOR ANY

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 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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 */

//package com.nowjava;/*n o w j a v a . c o m - 时代Java*/


import java.lang.reflect.Method;

import java.net.URL;

import java.net.URLClassLoader;


public class Main {

    /**

     * Appends a directory or jar to the system class loader.

     *

     * Do this only if you understand the consequences:

     * <ul>

     * <li>classes loaded by different class loaders are different classes</li>

     * <li>if the application uses the same classes the load order might create inconsistencies</li>

     * </ul>

     *

     * @param path the url to append to the system class loader

     */

    public static void appendToSystemPath(URL path) {

        if (path == null) {

            throw new IllegalArgumentException("Null path");

        }
        /*
        来 自*
         N  o w  J a v a . c o m
        */

        try {

            ClassLoader systemClassLoader = ClassLoader

                    .getSystemClassLoader();

            final Method method =