微信公众号推送客服消息，点击进入小程序

最新推荐文章于 2024-09-14 10:29:23 发布

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最新推荐文章于 2024-09-14 10:29:23 发布

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本文链接：https://blog.youkuaiyun.com/weixin_44151722/article/details/115144583

版权

本文介绍了如何通过Apache HttpClient库调用微信API上传图片至永久多媒体素材，并获取mediaId，随后利用mediaId实现消息推送至小程序。涉及了HTTP请求、JSON解析和OAuth授权的过程。

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添加依赖

    <dependency>
        <groupId>commons-httpclient</groupId>
        <artifactId>commons-httpclient</artifactId>
        <version>3.1</version>
    </dependency>

调用微信上传永久多媒体素材接口，获取mediaId

/**
 * 上传图片 至公众号媒体素材
 * accessToken 接口调用凭证
 **/
public static String uploadImage(){
    String postUrl = replaceURL("https://api.weixin.qq.com/cgi-bin/material/add_material?access_token={ACCESS_TOKEN}&type={TYPE}", access_token, "image");
    File file = new File("C:\\Users\\x1c\\Desktop\\img\\a.jpg");
    String mediaId = uploadImage(postUrl, file);
    return mediaId;
}


/**
 * 图片上传，返回mediaId
 */
public static String uploadImage(String url, File file) {
    org.apache.commons.httpclient.HttpClient client = new org.apache.commons.httpclient.HttpClient();
    PostMethod post = new PostMethod(url);
    post.setRequestHeader("User-Agent","Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:30.0) Gecko/20100101 Firefox/30.0");
    post.setRequestHeader("Host", "file.api.weixin.qq.com");
    post.setRequestHeader("Connection", "Keep-Alive");
    post.setRequestHeader("Cache-Control", "no-cache");
    String result = null;
    try{
        if (file != null && file.exists()){
            FilePart filepart = new FilePart("media", file, "image/jpeg","UTF-8");
            Part[] parts = new Part[] {filepart};
            MultipartRequestEntity entity = new MultipartRequestEntity(parts, post.getParams());
            post.setRequestEntity(entity);
            int status = client.executeMethod(post);
            if (status == HttpStatus.SC_OK) {
                String responseContent = post.getResponseBodyAsString();
                // 初始化解析json格式的对象
                JsonParser jsonparer = new JsonParser();
                JsonObject json = jsonparer.parse(responseContent).getAsJsonObject();
                LogUtil.logInfo("uploadImage json =====> " + json.toString());
                //"errcode":40004,"errmsg":"invalid media type"}{ // 上传成功  {"type":"TYPE","media_id":"MEDIA_ID","created_at":123456789}
                if (json.get("errcode") == null) {
                    result = json.get("media_id").getAsString();
                }
            }
        }
    }catch (Exception e) {
        e.printStackTrace();
    }finally{
        return result;
    }
}

根据上一步返回mediaId 推送消息

/**
 * 扫码推送/关注推送 消息   点击进入小程序
 *
 * openid为公众号openid
 * mediaId上一步返回
 * appid小程序appid，注：需将小程序与公众号绑定在同一个开放平台下
 */
public void sendToApplet(String openId, String mediaId) {
    String jsonStr = "{" +
            "    \"touser\":\""+openId+"\"," +
            "    \"msgtype\":\"miniprogrampage\"," +
            "    \"miniprogrampage\":" +
            "    {" +
            "        \"title\":\"小程序首页\"," +
            "        \"appid\":\""+小程序appid+"\"," +
            "        \"pagepath\":\"pages/index\"," +
            "        \"thumb_media_id\":\""+mediaId+"\"," +
            "    }" +
            "}";
    JSONObject params = JSONObject.parseObject(jsonStr);

    JSONObject res = hrefPost("https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={ACCESS_TOKEN}", "POST", params.toJSONString(), access_token);
}

工具方法

/**
 * 更换url
 */
public static String replaceURL(String url, String... params) {
    for (String param : params) {
        url = url.replaceFirst("\\{.*?\\}", param);
    }
    return url;
}

/**
 * wx http请求
 */
public static JSONObject hrefPost(String url, String method, String content, String... params) {
    try {
        URL realUrl = new URL(replaceURL(url, params));
        trustAllHttpsCertificates();
        HttpURLConnection conn = (HttpURLConnection) realUrl
                .openConnection();
        // 连接超时
        conn.setConnectTimeout(25000);
        // 读取超时 --服务器响应比较慢,增大时间
        conn.setReadTimeout(25000);
        HttpURLConnection.setFollowRedirects(true);
        // 请求方式
        conn.setRequestMethod(method);
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setRequestProperty("User-Agent",
                "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0");
        conn.connect();
        // 获取URLConnection对象对应的输出流
        // 发送请求参数
        OutputStream os = conn.getOutputStream();
        os.write(content.getBytes("UTF-8"));// 传入参数
        InputStream is = conn.getInputStream();
        int size = is.available();
        byte[] jsonBytes = new byte[size];
        is.read(jsonBytes);
        String result = new String(jsonBytes, "UTF-8");
        os.flush();
        os.close();
        if (conn != null) {
            conn.disconnect();
        }
        return JSONObject.parseObject(result);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}