在jsp页面复制文件的问题!!!!

import java.io.*;class p1
{
public static void main(String[] args)
{
try
{
BufferedReader br=new BufferedReader(new InputStreamReader(new FileInputStream("p1.java")));
DataOutputStream dos=new DataOutputStream(new FileOutputStream("pp.java"));
String str;Object o; while((str=br.readLine())!=null)
{
dos.writeBytes(str+"\n");
System.out.println(str);
}
}
catch (Exception e)
{
} }
}