import java.io.*;
public class DataStreamTest {
    public static void main(String[] args) {
        File file1 = new File("e:/testff.txt");
        File file2 = new File("e:/testff.txt");
        FileInputStream fis = null;
        FileOutputStream fos = null;
        DataInputStream dis = null;
        DataOutputStream dos = null;
        try {
            fis = new FileInputStream(file1);
            dis = new DataInputStream(fis);
            int n = 0;
            byte[] buff = new byte[1024];
            String data = "";
            int i = 0;
            while((n=dis.read(buff))!=-1){
                data += new String(buff,0,1,"iso-8859-1");
            }            
            fos = new FileOutputStream(file2);
            dos = new DataOutputStream(fos);
            dos.write(data.getBytes());
//            dos.write(-1);
//            dos.write(-1);
//            dos.write(-1);
//            dos.write(-1);
//            dos.write(-1);
//            dos.write(-1);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                if(dis!=null)dis.close();
                if(fis!=null)fis.close();
                if(dis!=null)dis.close();
                if(dos!=null)dos.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}