package cn.it.text;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.FilenameFilter;

/*

 * 2.获取指定目录及子目录下所有txt文件的个数，并将这些txt文件复制到D盘下任意目录

 */

public class Text2 {

    public static int num = 0;

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

        File file = new File("f:\\a");

        getTxt(file);

        System.out.println("复制完成！");

        System.out.println("txt文件的个数是："+num);

    }

    public static void getTxt(File file) throws Exception {

        // 判断传入的文件是否存在

        if (file.exists()) {

            File[] fileArr = file.listFiles();

            for (File f : fileArr) {

                // 判断是否是文件夹

                if (f.isDirectory()) {

                    getTxt(f);

                }

                // 不是文件夹的话,判断是否是txt

                if (f.getName().endsWith("txt")) {

                    num += 1;

                    BufferedInputStream in = new BufferedInputStream(new FileInputStream(f));

                    BufferedOutputStream out = new BufferedOutputStream(

                            new FileOutputStream(new File("f:\\c", f.getName())));

                    int len;

                    while ((len = in.read()) != -1) {

                        out.write(len);

                    }

                    in.close();

                    out.close();

                }

            }

        }

    }

}