java 微信服务器下载图片到自己服务器

来源：互联网发布：30岁的程序员被辞退了编辑：程序博客网时间：2024/04/29 12:38
/** * @author why *  */public class PicDownload {/** *  * 根据文件id下载文件 *  *  *  * @param mediaId *  *            媒体id *  * @throws Exception */public static InputStream getInputStream(String accessToken, String mediaId) {InputStream is = null;String url = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token="+ accessToken + "&media_id=" + mediaId;try {URL urlGet = new URL(url);HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();http.setRequestMethod("GET"); // 必须是get方式请求http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");http.setDoOutput(true);http.setDoInput(true);System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 连接超时30秒System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒http.connect();// 获取文件转化为byte流is = http.getInputStream();} catch (Exception e) {e.printStackTrace();}return is;}/** *  * 获取下载图片信息（jpg） *  *  *  * @param mediaId *  *            文件的id *  * @throws Exception */public static void saveImageToDisk(String accessToken, String mediaId, String picName, String picPath)throws Exception {InputStream inputStream = getInputStream(accessToken, mediaId);byte[] data = new byte[10240];int len = 0;FileOutputStream fileOutputStream = null;try {fileOutputStream = new FileOutputStream(picPath+picName+".jpg");while ((len = inputStream.read(data)) != -1) {fileOutputStream.write(data, 0, len);}} catch (IOException e) {e.printStackTrace();} finally {if (inputStream != null) {try {inputStream.close();} catch (IOException e) {e.printStackTrace();}}if (fileOutputStream != null) {try {fileOutputStream.close();} catch (IOException e) {e.printStackTrace();}}}}/** * 图片下载 *  * @param accessToken * @param mediaId */public static void getPic(String accessToken, String mediaId) {String requestUrl = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=ACCESS_TOKEN&media_id=MEDIA_ID";requestUrl = requestUrl.replace("ACCESS_TOKEN", accessToken).replace("MEDIA_ID", mediaId);JSONObject jsonObject = WeixinUtil.httpRequest(requestUrl, "GET", null);System.out.println(jsonObject);}public static void main(String[] args) throws Exception {String accessToken = "";String mediaId = "";String picName = "";saveImageToDisk(accessToken, mediaId, picName,"f:/");}}
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