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 UTF8PostMethod(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 class UTF8PostMethod extends PostMethod {//防止发送的消息产生乱码 90 public UTF8PostMethod(String url) { 91 super(url); 92 } 93 94 @Override 95 public String getRequestCharSet() {//文本编码格式 96 return "UTF-8"; 97 } 98 } 99 100 public static void main(String[] args) throws Exception 101 { 102 String accessToken = getToken(GET_TOKEN_URL, APP_ID, SECRET);// 获取token在微信接口之一中获取 103 if (accessToken != null)// token成功获取 104 { 105 System.out.println(accessToken); 106 File file = new File("f:" + File.separator + "2000.JPG"); // 获取本地文件 107 String id = uploadImage(UPLOAD_IMAGE_URL, accessToken, "image", 108 file);// java微信接口之三—上传多媒体文件 可获取 109 if (id != null) 110 { 111 // 构造数据 112 Map map = new HashMap(); 113 map.put("thumb_media_id", id); 114 map.put("author", "wxx"); 115 map.put("title", "标题"); 116 map.put("content", "测试fdsfdsfsdfssfdsfsdfsdfs"); 117 map.put("digest", "digest"); 118 map.put("show_cover_pic", "0"); 119 120 Map map2 = new HashMap(); 121 map2.put("thumb_media_id", id); 122 map2.put("author", "wxx"); 123 map2.put("content_source_url", "www.google.com"); 124 map2.put("title", "标题"); 125 map2.put("content", "测试fdsfdsfsdfssfdsfsdfsdfs"); 126 map2.put("digest", "digest"); 127 128 Map map3 = new HashMap(); 129 List<Map> list = new ArrayList<Map>(); 130 list.add(map); 131 list.add(map2); 132 map3.put("articles", list); 133 134 Gson gson = new Gson(); 135 String result = gson.toJson(map3);// 转换成json数据格式 136 String mediaId = uploadFodder(UPLOAD_FODDER_URL, accessToken, 137 result); 138 if (mediaId != null) 139 { 140 String ids = getGroups(GET_USER_GROUP, accessToken);// 在java微信接口之二—获取用户组 141 if (ids != null) 142 { 143 String[] idarray = ids.split(",");// 用户组id数组 144 for (String gid : idarray) 145 { 146 147 JsonObject jObj = new JsonObject(); 148 JsonObject filter = new JsonObject(); 149 filter.addProperty("group_id", gid); 150 jObj.add("filter", filter); 151 152 153 JsonObject mpnews = new JsonObject(); 154 mpnews.addProperty("media_id", mediaId); 155 jObj.add("mpnews", mpnews); 156 157 jObj.addProperty("msgtype", "mpnews"); 158 System.out.println(jObj.toString()); 159 160 String result2 = sendMsg(SEND_MESSAGE_URL, 161 accessToken, jObj.toString()); 162 System.out.println(result2); 163 } 164 } 165 } 166 167 } 168 } 169 } 170 }
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。
