从包中获取类迭代器

/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

import java.io.FileInputStream;/* 来自 时 代      J a v a   公   众 号 - nowjava.com*/

import java.io.IOException;

import java.lang.annotation.Annotation;

import java.io.File;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import java.util.NoSuchElementException;

import java.util.jar.JarEntry;

import java.util.jar.JarInputStream;


public class Main{


    /**

     * @param packageName Package through which to iterate

     * @return Iterator through the classes of this jar file (if executed from

     *         jar) or through the classes of org package (if .class file is

     *         executed)

     *//* 来 自 nowjava.com - 时代Java*/

    public static Iterator<Class<?>> getClassesIterator(String packageName) {

        if (isExecutedFromJar()) {

            try {

                return new JarClassesIterator(packageName);

            } catch (IOException e) {

                throw new RuntimeException(e);

            }

        } else {

            return new GeneralClassesIterator(packageName);

        }