import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileNotFoundException;

 import java.io.FileOutputStream;

 import java.io.IOException;

 public class work7 implements Runnable{

     /**

      * @param args

      * @throws IOException

      */

     public static void main(String[] args) {

         // TODO Auto-generated method stub

         work7 w = new work7();//创建接口类

         Thread t = new Thread(w);//

         t.start();//开启线程

     }

     public static void Runt(File a,File b,String str){

         str = str +"\\"+ b.getName();//在此拼接文件的地址！供下次遍历的文件夹使用

         File[] k = b.listFiles();//获取当前文件中所以的文件

         for(File file: k){//遍历

             if(file.isDirectory()){//判断是文件夹？

                 Runt(a,file,str);//递归调用此方法

             }else if(file.isFile()){//判断是文件！

                 try {//捕获异常

                     FileInputStream in = new FileInputStream(file);//需要复制的文件

                     File filF = new File(str);//创建该文件的父文件夹a.getAbsolutePath()+"\\"+file.getParentFile().getName()

                     filF.mkdir();

                     //输出文件的地址！

                     FileOutputStream out = new FileOutputStream(new File(str+"\\"+file.getName()));

                     byte[] by = new byte[1024];//创建缓存区

                     try {

                         while((in.read(by))!=-1){//读取时写入该文件中

                             out.write(by);

                         }

                     } catch (IOException e) {

                         // TODO Auto-generated catch block

                         e.printStackTrace();

                     }finally{

                         try {//强制关闭资源

                             out.close();

                             in.close();

                         } catch (IOException e) {

                             // TODO Auto-generated catch block

                             e.printStackTrace();

                         }

                     }

                 } catch (FileNotFoundException e) {

                     // TODO Auto-generated catch block

                     e.printStackTrace();

                 }

             }

         }

     }

     @Override

     public void run() {

         File file = new File("C:\\Users\\wang\\Desktop\\IOTest");

         File file2 = new File("C:\\Users\\wang\\Desktop\\object");

         Runt(file, file2,file.getAbsolutePath());

     }

 }