java 实现微信服务器下载图片到自己服务器
此功能的实现需要注意java 中IO流的操作及网路开发，
实现代码：
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/** * @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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原文链接：http://blog.csdn.net/u011072139/article/details/47108761
