Java 文件重命名 和拷贝文件

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

public class ReNameFile {

  private static final String PATH = "D:/shane/";
  private static final String TMP_PATH = PATH + "/tmp";

  /**
   * @param args
   * @throws Exception
   */
  public static void main(String[] args) throws Exception {

    File file = new File(PATH);
    String[] names = file.list();

    for (int i = 0; i < names.length; i++) {
      System.out.println("name: " + names[i]);
    }
    new File(TMP_PATH).mkdir();

    // 方式一：源文件不存在了。
    // for (int i = 0; i < names.length; i++) {
    // new File(PATH + "/" + names[i]).renameTo(new File(TMP_PATH + "/"
    // + (i + 1) + ".png"));
    // }

    // 方式二：源文件存在。
    for (int i = 0; i < names.length; i++) {

      FileInputStream is = new FileInputStream(new File(PATH + "/"
          + names[i]));
      FileOutputStream os = new FileOutputStream(new File(TMP_PATH + "/"
          + (i + 1) + ".png"));

      byte[] buf = new byte[1024];

      while (is.read(buf) != -1) {
        os.write(buf);
      }

    }

  }
}