IO复制图片

//： 采用高效的流，一个多个字节的方式赋值    private static void method4(String src, String dest) throws IOException {        //1，指定数据源        BufferedInputStream in = new BufferedInputStream(new FileInputStream(src));         //2，指定目的地        BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(dest));         //3，读数据        byte[] buffer = new byte[1024];        int len = -1;        while ( (len = in.read(buffer)) != -1) {            //4,写数据            out.write(buffer, 0, len);        }         //5，关闭流        in.close();        out.close();    }