FileStreamDemo

package net.demo.filestream;

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

public class FileStreamDemo ...{

    public static void main(String[] args) throws IOException ...{
        byte[] buffer = new byte[1024];

        FileInputStream fileInputStream = new FileInputStream(new File("d:/temp/a.txt"));
        FileOutputStream fileOutputStream = new FileOutputStream(new File("d:/temp/b.txt"));

        System.out.println("複製文件：" + fileInputStream.available() + "字節");

        while (true) ...{
            if (fileInputStream.available() < 1024) ...{
                int remain = -1;
                while ((remain = fileInputStream.read()) != -1) ...{
                    fileOutputStream.write(remain);
                }
                break;
            } else ...{
                fileInputStream.read(buffer);
                fileOutputStream.write(buffer);
            }
        }

        fileInputStream.close();
        fileOutputStream.close();

        System.out.println("複製完成");
    }

}