下载微信服务器上的图片到自己的服务器

向右看齐 2022-05-14 01:37 225阅读 0赞

# **下载微信服务器上的图片到自己的服务器** #

### **微信上传图片后** ###

*  单张图片将返回serverId
 *  多张图片将返回serverId数组，后续只需遍历下载即可

### **下载微信服务器上的图片** ###

*  工具类
    
     
    
        。。。 import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; public class ImageUtils { /** * @param temp_path(注：临时文件存储目录) * @param serverId(注：图片上传完微信服务器后返回的serverId) * @param image_number(注：图片的编号) * @return */ public static boolean saveImage(String temp_path, String serverId, String image_number) { boolean isSave = true; File saveFile = new File(temp_path); if (!saveFile.exists()) { saveFile.mkdirs(); } try { String s = saveImageToDisk(serverId, image_number, temp_path + "/"); if (s != null || !"".equals(s.trim())) { isSave = true; } } catch (Exception e) { e.printStackTrace(); } return isSave; } //获取 private 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) { } return is; } private static String saveImageToDisk(String serverId, String picName, String picPath) throws Exception { Weixin weixin = new Weixin(ConfigData.weixin_app_id, ConfigData.weixin_secret, ConfigData.weixin_cache_dir);//此步骤你自己创建自己的weixin对象 String accessToken = weixin.getGlobalAccessToken(); InputStream inputStream = getInputStream(accessToken, serverId); // 循环取出流中的数据 byte[] data = new byte[1024]; int len = 0; FileOutputStream fileOutputStream = null; String filePath = picPath + picName; try { fileOutputStream = new FileOutputStream(filePath); while ((len = inputStream.read(data)) != -1) { fileOutputStream.write(data, 0, len); } } catch (IOException e) { } finally { if (inputStream != null) { try { inputStream.close(); } catch (IOException e) { } } if (fileOutputStream != null) { try { fileOutputStream.close(); } catch (IOException e) { } } } return filePath; } }

### **微信weixin对象根据你的实际情况来创建** ###