此方法返回一个新的ClassLoader对象，该对象可用于从指定目录包含的文件中加载类。

//package com.nowjava;

import java.io.File;

import java.io.IOException;//N o w  J a v a  . c o m 提 供


import java.net.URISyntaxException;

import java.net.URL;

import java.net.URLClassLoader;

import java.util.ArrayList;

import java.util.Collection;


public class Main {

    /**

     * This method returns a new ClassLoader object that can be used to load classes from files contained by the specified

     * directory.

     * @param directory - the path of the directory the ClassLoader should load from

     * @return a ClassLoader that can be used to load classes and resources from files in the specified directory

     * @throws IOException

     * @throws URISyntaxException

     * @throws IOException 

     * @see ClassLoader

     */

    public static ClassLoader createDirectoryLoader(String directory)

            throws URISyntaxException, IOException {

        Collection<URL> urls = new ArrayList<URL>();

        File dir = new File(directory);

        File[] files = dir.listFiles();

        for (File f : files) {