java实现考备文件

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class CopyFile {

           public void copy(File file, String url) throws IOException {

                      if (file != null) {
                                 if (file.isFile()) {

                                 // 构造输入流
                                  InputStream input = new FileInputStream(file);
                                  BufferedInputStream buffin = new BufferedInputStream(input);

                                  // 构造输出流
                                  OutputStream out = new FileOutputStream(url + "//"
                                   + file.getName(), true);
                                  BufferedOutputStream bout = new BufferedOutputStream(out);

                                  byte[] bytes = new byte[1024];

                                   // 读写操作
                                  while (buffin.available() >= 1024) {
                                             buffin.read(bytes);
                                             bout.write(bytes);
                                   }

                                 // 读写剩余的字节数
                                  bytes = new byte[buffin.available()];
                                  buffin.read(bytes);
                                  bout.write(bytes);

                                   // 关闭
                                  bout.close();
                                  buffin.close();
                                  out.close();
                                  input.close();
                        }
              }

   }

 /**
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub

              File file = new File("e://Dreamweaver8-chs.exe");

              CopyFile copyFile = new CopyFile();
              try {
                       System.out.println("开始时间："+System.currentTimeMillis());
                       copyFile.copy(file, "c://");
                       System.out.println("结束时间: "+System.currentTimeMillis());
                       System.out.println("复制完毕!");
              } catch (IOException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
              }

       }

}