java-图片下载

图片下载

    public static void main(String[] args) {
        List<String> urlList = new ArrayList<String>();
        urlList.add("http://www.neeq.com.cn/uploads/1/image/public/201606/20160615155145_kugr388dtr.png");

        uploadImg(urlList);
    }

    private static void uploadImg(List<String> urlList){
        String filepath = "C:\Users\huage\Desktop\n3b_nq\secrities_img";
        if( urlList != null && urlList.size() > 0 ){
            for (int i = 0; i < urlList.size(); i++) {
                String url = urlList.get(i);
                try {
                    getImages(url, filepath+"\"+i+url.substring(url.lastIndexOf(".")));
                } catch (Exception e) {
                    System.out.println(e.getMessage()+":------------>"+url);
                }
            }
        }
    }
        
    /**
     * 图片路径
     * @param urlPath
     * @param fileName:图片存放地址，和名称
     * @throws Exception
     */
    public static void getImages(String urlPath,String fileName) throws Exception{
        URL url = new URL(urlPath);//：获取的路径
        //:http协议连接对象
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.setReadTimeout(6 * 10000);
        if (conn.getResponseCode() <10000){
            InputStream inputStream = conn.getInputStream();
            byte[] data = readStream(inputStream);
            FileOutputStream outputStream = new FileOutputStream(fileName);
            outputStream.write(data);
            outputStream.close();
        }
         
    }
    
    /**
     * 读取url中数据，并以字节的形式返回
     * @param inputStream
     * @return
     * @throws Exception
     */
    public static byte[] readStream(InputStream inputStream) throws Exception{
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len = -1;
        while((len = inputStream.read(buffer)) !=-1){
            outputStream.write(buffer, 0, len);
        }
        outputStream.close();
        inputStream.close();
        return outputStream.toByteArray();
    }