生成目录，包括任何必要但不存在的父目录。

/*

 * 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.

 */

//package com.nowjava;


import java.io.File;/** 来 自 n  o  w  j  a  v  a . c o m**/


import java.io.IOException;


public class Main {

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

        File directory = new File("Main.java");

        forceMkdir(directory);

    }


    /**

     * Makes a directory, including any necessary but nonexistent parent

     * directories. If a file already exists with specified name but it is

     * not a directory then an IOException is thrown.

     * If the directory cannot be created (or does not already exist)

     * then an IOException is thrown.

     *

     * @param directory  directory to create, must not be <code>null</code>

     * @throws NullPointerException if the directory is <code>null</code>

     * @throws IOException if the directory cannot be created or the file already exists but is not a directory

     */

    public static void forceMkdir(File directory) throws IOException {
    /**
    时 代 J a v a 公 众 号 提供 
    **/

        if (directory.exists()) {

            if (!directory.isDirectory()) {

                String message = "File " + directory + " exists and is "

                        + "not a directory. Unable to create directory.";

                throw new IOException(message);

            }

        } else {

            if (!directory.mkdirs()) {