import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * achieve file copy and delete using recursion
 * 
 * @author ForeverLover
 * 
 */
public class FileCopyAndDelete {

     // delete files of this path
     public void deleteFile(String path) {
          File f = new File(path);
          if (f.isDirectory()) {
               File[] file = f.listFiles();
               for (File file1 : file) {
                    this.deleteFile(file1.toString());
                    file1.delete();
               }
          } else {
               f.delete();
          }
          f.delete();
     }

     // copy files from path1 to path2
     public void copyFiles(String path1, String path2) throws IOException {
          File f = new File(path1);
          if (f.isDirectory()) {
               File file = new File(path2);
               if (!file.exists())
                    file.mkdir();
               File[] file1 = f.listFiles();
               for (File file2 : file1) {
                    copyFiles(file2.toString(), path2 + "/" + file2.getName());
               }
          } else {
               copy(path1, path2);
          }
     }

     // copy file from path1 to path2 one by one
     public void copy(String path1, String path2) throws IOException {

          DataInputStream in = new DataInputStream(new BufferedInputStream(
                    new FileInputStream(path1)));

          byte[] b = new byte[in.available()];// available返回实际可读字节数，即总大小
          in.read(b);

          DataOutputStream out = new DataOutputStream(new BufferedOutputStream(
                    new FileOutputStream(path2)));
          out.write(b);

          in.close();
          out.close();
     }

     // main method
     public static void main(String[] args) {
          FileCopyAndDelete f = new FileCopyAndDelete();

          // test copy files using recursive
          /*
           * { String path1 = "D://Folder1"; String path2 = "D://Folder2"; try {
           * f.copyFiles(path1, path2); System.out.println("OK,COPY FINISH"); }
           * catch (IOException e) { e.printStackTrace(); } }
           */

          // test delete files using recursive
          /*
           * { f.deleteFile("C://Folder1");
           * System.out.println("OK,DELETE FINISH"); }
           */

     }
}