java微信平台，高级群发接口开发

一、微信消息分组群发接口简介

1、请求：该请求是使用post提交地址为：

https://api.weixin.qq.com/cgi-bin/message/mass/sendall?access_token=ACCESS_TOKEN

其中ACCESS_TOKEN是我们动态获取的 。

发送的数据：(这里使用图文消息示例)

{
  "filter":{
    "group_id":"2"
  },
  "mpnews":{
    "media_id":"123dsdajkasd231jhksad"
  },
   "msgtype":"mpnews"
}

filter，用于设定图文消息的接收者； group_id，群发到的分组的group_id（可在java微信接口之二—获取用户组）；

mpnews,用于设定即将发送的图文消息；

media_id, 用于群发的消息的media_id(可在java微信接口之四—上传素材中获取)； msgtype,群发的消息类型，图文消息为mpnews，文本消息为text，语音为voice，音乐为music，图片为image，视频为video.

2、响应：该响应也是以json方式返回的

正确的时候返回的数据：

{
   "errcode":0,
   "errmsg":"send job submission success",
   "msg_id":34182
}

errcode 错误码

errmsg 错误信息

msg_id 消息ID

错误的时候返回的数据：{"errcode":40004,"errmsg":"invalid media type"}

errcode，为错误代码，errmsg为错误信息

具体api可查看： http://mp.weixin.qq.com/wiki/index.php?title=%E9%AB%98%E7%BA%A7%E7%BE%A4%E5%8F%91%E6%8E%A5%E5%8F%A3

二、关于java代码的调用

该接口的调用与java微信接口四—上传素材一样，需要使用到commons-httpclient。其中数据是构造成json数据后，放在post方法请求体里面发送给服务器端。

三、代码实现

  1 package com.demo.test;
  2 
  3 import java.io.File;
  4 import java.util.ArrayList;
  5 import java.util.HashMap;
  6 import java.util.List;
  7 import java.util.Map;
  8 
  9 import org.apache.commons.httpclient.methods.PostMethod;
 10 import org.apache.commons.httpclient.methods.multipart.FilePart;
 11 import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;
 12 import org.apache.commons.httpclient.methods.multipart.Part;
 13 import org.apache.http.HttpEntity;
 14 import org.apache.http.HttpResponse;
 15 import org.apache.http.HttpStatus;
 16 import org.apache.http.client.HttpClient;
 17 import org.apache.http.client.methods.HttpGet;
 18 import org.apache.http.impl.client.DefaultHttpClient;
 19 import org.apache.http.util.EntityUtils;
 20 
 21 import com.google.gson.Gson;
 22 import com.google.gson.JsonArray;
 23 import com.google.gson.JsonObject;
 24 import com.google.gson.JsonParser;
 25 
 26 public class Test
 27 {
 28     public static final String GET_TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token";// 获取access
 29     public static final String UPLOAD_IMAGE_URL = "http://file.api.weixin.qq.com/cgi-bin/media/upload";// 上传多媒体文件
 30     public static final String UPLOAD_FODDER_URL = "https://api.weixin.qq.com/cgi-bin/media/uploadnews";
 31     public static final String GET_USER_GROUP = "https://api.weixin.qq.com/cgi-bin/groups/get"; // url
 32     public static final String SEND_MESSAGE_URL = "https://api.weixin.qq.com/cgi-bin/message/mass/sendall";
 33     public static final String APP_ID = "wxa549b28c24cf341e";
 34     public static final String SECRET = "78d8a8cd7a4fa700142d06b96bf44a37";
 35 
 36 
 37     /**
 38      * 发送消息
 39      * 
 40      * @param uploadurl
 41      *            apiurl
 42      * @param access_token
 43      * @param data
 44      *            发送数据
 45      * @return
 46      */
 47     public static String sendMsg(String url, String token, String data)
 48     {
 49         org.apache.commons.httpclient.HttpClient client = new org.apache.commons.httpclient.HttpClient();
 50         String sendurl = String.format("%s?access_token=%s", url, token);
 51         PostMethod post = new PostMethod(sendurl);
 52         post
 53                 .setRequestHeader(
 54                         "User-Agent",
 55                         "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:30.0) Gecko/20100101 Firefox/30.0");
 56 
 57         post.setRequestHeader("Host", "file.api.weixin.qq.com");
 58         post.setRequestHeader("Connection", "Keep-Alive");
 59         post.setRequestHeader("Cache-Control", "no-cache");
 60         String result = null;
 61         try
 62         {
 63             post.setRequestBody(data);
 64             int status = client.executeMethod(post);
 65             if (status == HttpStatus.SC_OK)
 66             {
 67                 String responseContent = post.getResponseBodyAsString();
 68                 System.out.println(responseContent);
 69                 JsonParser jsonparer = new JsonParser();// 初始化解析json格式的对象
 70                 JsonObject json = jsonparer.parse(responseContent)
 71                         .getAsJsonObject();
 72                 if (json.get("errcode") != null
 73                         && json.get("errcode").getAsString().equals("0"))
 74                 {
 75                     result = json.get("errmsg").getAsString();
 76                 }
 77             }
 78         }
 79         catch (Exception e)
 80         {
 81             e.printStackTrace();
 82         }
 83         finally
 84         {
 85             return result;
 86         }
 87     }
 88 
 89     public static void main(String[] args) throws Exception
 90     {
 91         String accessToken = getToken(GET_TOKEN_URL, APP_ID, SECRET);// 获取token在微信接口之一中获取
 92         if (accessToken != null)// token成功获取
 93         {
 94             System.out.println(accessToken);
 95             File file = new File("f:" + File.separator + "2000.JPG"); // 获取本地文件
 96             String id = uploadImage(UPLOAD_IMAGE_URL, accessToken, "image",
 97                     file);// java微信接口之三—上传多媒体文件 可获取
 98             if (id != null)
 99             {
100                 // 构造数据
101                 Map map = new HashMap();
102                 map.put("thumb_media_id", id);
103                 map.put("author", "wxx");
104                 map.put("title", "标题");
105                 map.put("content", "测试fdsfdsfsdfssfdsfsdfsdfs");
106                 map.put("digest", "digest");
107                 map.put("show_cover_pic", "0");
108 
109                 Map map2 = new HashMap();
110                 map2.put("thumb_media_id", id);
111                 map2.put("author", "wxx");
112                 map2.put("content_source_url", "www.google.com");
113                 map2.put("title", "标题");
114                 map2.put("content", "测试fdsfdsfsdfssfdsfsdfsdfs");
115                 map2.put("digest", "digest");
116 
117                 Map map3 = new HashMap();
118                 List

发成功后会打印消息，但由于微信服务器的原因，消息不会立即发送，会过一段时间发送。