java io

 

import java.io.*;

public class FileStreamDemo {

    public static void main(String[] args) {

        try {

           // 来源文件

            FileInputStream in = new FileInputStream("D:/b.txt");

            // 目的文件

            FileOutputStream out = new FileOutputStream("C:/a.txt");

            byte[] bytearray = new byte[1024];

            do {

                in.read(bytearray, 0, 1024);

               out.write(bytearray);

            } while (in.available() > 0);

            in.close();

            out.close();

        } catch (ArrayIndexOutOfBoundsException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

//--------------------------------------------------------------------------//

import java.io.*;

public class FileStreamDemo {

    public static void main(String[] args) {

        try {

            // 来源文件

            FileInputStream in = new FileInputStream("D:/b.txt");

            // 目的文件

            FileOutputStream out = new FileOutputStream("C:/a.txt");

            BufferedInputStream bufferedIn = new BufferedInputStream(in);

            BufferedOutputStream bufferedOut = new BufferedOutputStream(out);

            byte[] data = new byte[1];

            while (bufferedIn.read(data) != -1) {

                bufferedOut.write(data);

            }

            //将缓冲区中的数据全部写出

            bufferedOut.flush();

            //关闭流

            bufferedIn.close();

            bufferedOut.close();

        } catch (ArrayIndexOutOfBoundsException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}