java实现微信公众号群发文本消息

微信开发平台：微信公众号开发文档

废话不多说，直接上代码

1、Controller层调用代码

/*** 群发消息* @param user* @return*/@RequestMapping(value="/groupMessage",method=RequestMethod.POST,produces ="application/json;charset=utf-8")public JSONObject Message(@RequestBody(required=false)JSONObject obje) {JSONObject result=new JSONObject();logger.info("-----------开始群发------------");String content=obje.getString("content");//群发内容Integer code=wechatMsg.GroupMessage(wechatMsg.getToken(),content);//群发消息if(code==0) {result.put("code",0);result.put("data","群发成功");}else {result.put("code",1201);result.put("data","微信群发消息失败");}return result;}

2、工具类WechatMsg代码，下面以群发文本消息为例，如果是实现群发文本消息（群发其它消息，如图片视频等，请参考微信公众号开发文档），可以直接复制，只需要修改XXX的地方代码就可以了

import java.io.IOException;import java.io.InputStream;import java.io.OutputStreamWriter;import .HttpURLConnection;import .URL;import java.util.HashMap;import java.util.Map;import org.ponent;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONObject;import com.demo.entity.DataEntity;@Componentpublic class WechatMsg {/*** 获取token* * @return token*/public String getToken() {// 授予形式String grant_type = "client_credential";//应用IDString appid = "XXXXXXXXXXXXXXXXXXXXXXXXX";//密钥String secret = "XXXXXXXXXXXXXXXXXXXXXXXXX";// 接口地址拼接参数String getTokenApi = "https://api./cgi-bin/token?grant_type=" + grant_type + "&appid=" + appid+ "&secret=" + secret;String tokenJsonStr = doGetPost(getTokenApi, "GET", null);JSONObject tokenJson = JSONObject.parseObject(tokenJsonStr);String token = tokenJson.get("access_token").toString();System.out.println("获取到的TOKEN : " + token);return token;}/**** 群发文本消息* @param token*/public Integer GroupMessage(String token,String content) {// 接口地址String sendMsgApi = "https://api./cgi-bin/message/mass/sendall?access_token="+token;//整体参数mapMap<String, Object> paramMap = new HashMap<String, Object>();//相关mapMap<String, Object> dataMap1 = new HashMap<String, Object>();Map<String, String> dataMap2 = new HashMap<String, String>();dataMap1.put("is_to_all",true);//用于设定是否向全部用户发送，值为true或false，选择true该消息群发给所有用户，选择false可根据tag_id发送给指定群组的用户dataMap1.put("tag_id",1);//群发到的标签的tag_id，参见用户管理中用户分组接口，若is_to_all值为true，可不填写tag_iddataMap2.put("content",content);//要推送的内容paramMap.put("filter",dataMap1);//用于设定图文消息的接收者paramMap.put("text", dataMap2);//文本内容paramMap.put("msgtype","text");//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，卡券为wxcardString back=doGetPost(sendMsgApi,"POST",paramMap);System.out.println("群发返回:"+back);JSONObject jsonObject =JSONObject.parseObject(back);//String转JSONObject，Integer re=jsonObject.getInteger("errcode");return re;}/*** 调用接口 post* @param apiPath*/public String doGetPost(String apiPath,String type,Map<String,Object> paramMap){OutputStreamWriter out = null;InputStream is = null;String result = null;try{URL url = new URL(apiPath);// 创建连接HttpURLConnection connection = (HttpURLConnection) url.openConnection();connection.setDoOutput(true);connection.setDoInput(true);connection.setUseCaches(false);connection.setInstanceFollowRedirects(true);connection.setRequestMethod(type) ; // 设置请求方式connection.setRequestProperty("Accept", "application/json"); // 设置接收数据的格式connection.setRequestProperty("Content-Type", "application/json"); // 设置发送数据的格式connection.connect();if(type.equals("POST")){out = new OutputStreamWriter(connection.getOutputStream(), "UTF-8"); // utf-8编码out.append(JSON.toJSONString(paramMap));out.flush();out.close();}// 读取响应is = connection.getInputStream();int length = (int) connection.getContentLength();// 获取长度if (length != -1) {byte[] data = new byte[length];byte[] temp = new byte[512];int readLen = 0;int destPos = 0;while ((readLen = is.read(temp)) > 0) {System.arraycopy(temp, 0, data, destPos, readLen);destPos += readLen;}result = new String(data, "UTF-8"); // utf-8编码}} catch (IOException e) {e.printStackTrace();} finally {try {is.close();} catch (IOException e) {e.printStackTrace();}}return result;}}

3、如果你的需求是群发，那么到这里就结束了，如果需求是分组发(也就是is_to_all设为false时)，需要先获取标签id，可以调用下面方法获取标签id，获取到的标签id填入上面代码中的tag_id变量。注意：下面代码中name的value值不能和公众号中已存在的标签名一样，调用下面代码成功后才能在公众号生成新标签

/*** 调用这个方法获取标签ID后,还要在公众号上给标签添加用户* @param token* @return*/public Integer getTab(String token) {String sendMsgApi = "https://api./cgi-bin/tags/create?access_token="+token;//整体参数mapMap<String, Object> paramMap = new HashMap<String, Object>();//相关mapMap<String, Object> dataMap1 = new HashMap<String, Object>();dataMap1.put("name","test6");//这里写你要创建的标签名paramMap.put("tag",dataMap1);String back=doGetPost(sendMsgApi,"POST",paramMap);System.out.println("请求获取标签接口返回:"+back);JSONObject jsonObject =JSONObject.parseObject(back).getJSONObject("tag");//String转JSONObject，Integer id=-1;//设id初始值为-1,如果最后返回id还是-1,代表获取标签失败if(jsonObject!=null) {id=jsonObject.getInteger("id");}return id;}

有什么不懂或建议可以直接评论，我会尽快解决