文件复制三种方法

       File f = new File("d:\\ibatis.log");
        File f1 = new File("d:\\ibatis2.log");
        byte b[] = new byte[1024];
        int l = 0;
        char c[] = new char[1024];
        String str = "";
        try
        {
            /**
             * 文件复制方法1
             */
            FileInputStream fis = new FileInputStream(f);
            FileOutputStream fos = new FileOutputStream(f1);
            while ((l = fis.read(b)) > 0)
            {
                fos.write(b);
            }
            /**
             * 文件复制方法2
             */
            FileReader fr = new FileReader(f);
            FileWriter fw = new FileWriter(f1);
            
            while ((l = fr.read(c)) > 0)
            {
                fw.write(c);
            }
            /**
             * 文件复制方法3
             */
            BufferedReader br = new BufferedReader(new InputStreamReader(fis));
            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fos));
            while ((str = br.readLine()) != null)
            {
                bw.write(str);
            }
            
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }