1。 String path=request.getParameter("pic");
  String inputpath="D://pic//b.jpg";
  try   {  
           
            FileChannel   srcChannel   =   new   FileInputStream(path).getChannel();  
            FileChannel   dstChannel   =   new   FileOutputStream(inputpath).getChannel();  
            dstChannel.transferFrom(srcChannel,   0,   srcChannel.size());  
            srcChannel.close();  
            dstChannel.close();  
    }   catch   (IOException   e)   {  
               
    }   2。 import java.io.*;
public class copypicture {
public static void main(String[] args){
try{FileInputStream fin=new FileInputStream("C://img.jpg");
FileOutputStream fout=new FileOutputStream("C://img1.jpg");
byte[] buf=new byte[fin.available()];
fin.read(buf);
fout.write(buf);
fin.close();
fout.close();
System.out.println("file copy success!");
}catch(IOException e){System.out.println("copy file failed!");}
}
}