java开发微信公众平台之素材上传

微信公众平台官方文档

首先引入依赖

		<dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>4.4.1</version>
        </dependency>

上传代码

/**
     * 微信服务器新增临时素材
     * 封面图片
     * @param file
     *            图片file
     * @param token
     *            access_token
     */
    public static JSONObject uploadTemporaryMedia(File file, String token) throws IOException {
        if (file == null || token == null) {
            return null;
        }
        if (!file.exists()) {
            return null;
        }
        String responseData = null;
        try {
            String url = "https://api.weixin.qq.com/cgi-bin/media/upload?access_token="+token+"&type=image";
            OkHttpClient client = new OkHttpClient();
            MediaType mediaType = MediaType.parse("image/png");
            RequestBody fileBody = RequestBody.create(mediaType, file);
            RequestBody requestBody = new MultipartBody.Builder()
                    .setType(MultipartBody.FORM)
                    .addFormDataPart("media", file.getName(), fileBody)
                    .build();
            Request request = new Request.Builder()
                    .url(url)
                    .post(requestBody)
                    .build();
            Response response = client.newCall(request).execute();
            responseData = response.body().string();
            System.out.println(responseData);
        }catch (Exception e){
            e.printStackTrace();
        }

        //        return result;
        return JSONObject.parseObject(responseData);
    }