JAVA 实现通过URL下载文件到本地库

/**
     * TODO 下载文件到本地
     * @author nadim  
     * @date Sep 11, 2015 11:45:31 AM
     * @param fileUrl 远程地址
     * @param fileLocal 本地路径
     * @throws Exception 
     */
    public void downloadFile(String fileUrl,String fileLocal) throws Exception {
        URL url = new URL(fileUrl);
        HttpURLConnection urlCon = (HttpURLConnection) url.openConnection();
        urlCon.setConnectTimeout(6000);
        urlCon.setReadTimeout(6000);
        int code = urlCon.getResponseCode();
        if (code != HttpURLConnection.HTTP_OK) {
            throw new Exception("文件读取失败");
        }
        
        //读文件流
        DataInputStream in = new DataInputStream(urlCon.getInputStream());
        DataOutputStream out = new DataOutputStream(new FileOutputStream(fileLocal));
        byte[] buffer = new byte[2048];
        int count = 0;
        while ((count = in.read(buffer)) > 0) {
            out.write(buffer, 0, count);
        }
        out.close();
        in.close();
    }