import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.Scanner;public class copy {    public static void main(String[] args) throws IOException {        Scanner sc = new Scanner(System.in);        System.out.println("请输入源目录");        String sourcePath = sc.nextLine();        System.out.println("请输入新目录");        String path = sc.nextLine();                //String sourcePath = "D://aa";        //String path = "D://bb";                copyDir(sourcePath, path);    }        public static void copyFile(String oldPath, String newPath) throws IOException {        File oldFile = new File(oldPath);        File file = new File(newPath);        FileInputStream in = new FileInputStream(oldFile);        FileOutputStream out = new FileOutputStream(file);;        byte[] buffer=new byte[2097152];        int readByte = 0;        while((readByte = in.read(buffer)) != -1){            out.write(buffer, 0, readByte);        }            in.close();        out.close();    }        public static void copyDir(String sourcePath, String newPath) throws IOException {        File file = new File(sourcePath);        String[] filePath = file.list();                if (!(new File(newPath)).exists()) {            (new File(newPath)).mkdir();        }                for (int i = 0; i < filePath.length; i++) {            if ((new File(sourcePath + file.separator + filePath[i])).isDirectory()) {                copyDir(sourcePath  + file.separator  + filePath[i], newPath  + file.separator + filePath[i]);            }                        if (new File(sourcePath  + file.separator + filePath[i]).isFile()) {                copyFile(sourcePath + file.separator + filePath[i], newPath + file.separator + filePath[i]);            }                    }    }}