微信群發接口的基本思路：

1.? 獲取關注者列表

2.? 創建群發的XML

3.? 發送群發的XML。

作者編寫了一個文本群發的demo 供讀者分享。

public class TestWeixinGroupSend {

public String getAccess_token(){

String access_token=null;

StringBuffer action =new StringBuffer();

action.append("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential")

.append("&appid=********")

.append("&secret=****************");

URL url;

try {

url = new URL(action.toString());

HttpURLConnection http = (HttpURLConnection) url.openConnection();

http.setRequestMethod("GET");

http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");

http.setDoInput(true);

InputStream is =http.getInputStream();

int size =is.available();

byte[] buf=new byte[size];

is.read(buf);

String resp =new String(buf,"UTF-8");

JSONObject jsonObject =JSONObject.fromObject(resp);

System.out.println("access_token:"+jsonObject.toString());

Object object =jsonObject.get("access_token");

if(object !=null){

access_token =String.valueOf(object);

}

return access_token;

} catch (MalformedURLException e) {

e.printStackTrace();

return access_token;

} catch (IOException e) {

e.printStackTrace();

return access_token;

}

}

public JSONArray getOpenids(){

JSONArray array =null;

String urlstr ="https://api.weixin.qq.com/cgi-bin/user/get?access_token=ACCESS_TOKEN&next_openid=NEXT_OPENID";

urlstr =urlstr.replace("ACCESS_TOKEN", getAccess_token());

urlstr =urlstr.replace("NEXT_OPENID", "");

URL url;

try {

url = new URL(urlstr);

HttpURLConnection http = (HttpURLConnection) url.openConnection();

http.setRequestMethod("GET");

http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");

http.setDoInput(true);

InputStream is =http.getInputStream();

int size =is.available();

byte[] buf=new byte[size];

is.read(buf);

String resp =new String(buf,"UTF-8");

JSONObject jsonObject =JSONObject.fromObject(resp);

System.out.println("resp:"+jsonObject.toString());

array =jsonObject.getJSONObject("data").getJSONArray("openid");

return array;

} catch (MalformedURLException e) {

e.printStackTrace();

return array;

} catch (IOException e) {

e.printStackTrace();

return array;

}

}

@Test

public void testsendTextByOpenids(){

String urlstr ="https://api.weixin.qq.com/cgi-bin/message/mass/send?access_token=ACCESS_TOKEN";

String reqjson =createGroupText(getOpenids());

try {

URL httpclient =new URL(urlstr);

HttpURLConnection conn =(HttpURLConnection) httpclient.openConnection();

conn.setConnectTimeout(5000);

conn.setReadTimeout(2000);

conn.setRequestMethod("POST");

conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");

conn.setDoOutput(true);

conn.setDoInput(true);

conn.connect();

OutputStream os= conn.getOutputStream();

System.out.println("req:"+reqjson);

os.write(reqjson.getBytes("UTF-8"));//傳入參數

os.flush();

os.close();

InputStream is =conn.getInputStream();

int size =is.available();

byte[] jsonBytes =new byte[size];

is.read(jsonBytes);

String message=new String(jsonBytes,"UTF-8");

System.out.println("resp:"+message);

} catch (MalformedURLException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

private String createGroupText(JSONArray array){

JSONObject gjson =new JSONObject();

gjson.put("touser", array);

gjson.put("msgtype", "text");

JSONObject text =new JSONObject();

text.put("content", "hello from boxer.");

gjson.put("text", text);

return gjson.toString();

}

}

總結

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