java 下载文件

public static boolean httpDownload(String httpUrl, File saveFile) {
        System.out.print("download file .....");
        // 下载网络文件
        int bytesum = 0;
        int byteread = 0;
        URL url = null;
        try {
            url = new URL(httpUrl);
        } catch (MalformedURLException e1) {
            e1.printStackTrace();
            return false;
        }
        try {
            URLConnection conn = url.openConnection();
            InputStream inStream = conn.getInputStream();
            FileOutputStream fs = new FileOutputStream(saveFile);
            byte[] buffer = new byte[1204];
            while ((byteread = inStream.read(buffer)) != -1) {
                bytesum += byteread;
                System.out.println("downloaad..." + bytesum);
                fs.write(buffer, 0, byteread);
            }
            inStream.close();
            fs.close();
            return true;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return false;
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }