复制文件

  public static void copyTo(String srcName, String targetName) throws IOException {
        File file = new File(srcName);
        if (file.exists()) {
            BufferedInputStream inBuff = null;
            BufferedOutputStream outBuff = null;
            try {
                // 新建文件输入流并对它进行缓冲
                inBuff = new BufferedInputStream(new FileInputStream(srcName));

                // 新建文件输出流并对它进行缓冲
                outBuff = new BufferedOutputStream(new FileOutputStream(targetName));

                // 缓冲数组
                byte[] b = new byte[1024 * 5];
                int len;
                while ((len = inBuff.read(b)) != -1) {
                    outBuff.write(b, 0, len);
                }
                // 刷新此缓冲的输出流
                outBuff.flush();
            } finally {
                // 关闭流
                if (inBuff != null)
                    inBuff.close();
                if (outBuff != null)
                    outBuff.close();
            }
        }
    }