一、微信公众平台小程序开通消息订阅并设置模板

这边的模板id和详细内容后续前后端需要使用

二、uniapp前端

需要是一个button触发
js：

wx.getSetting({success(res){console.log(res)if(res.authSetting['scope.subscribeMessage']){// 业务逻辑}else{uni.requestSubscribeMessage({tmplIds: [_config.TEMPLATE_ID],success (res) {console.log("订阅成功！")// 业务逻辑},fail(res) {// 即使用户拒绝订阅也要继续原来的业务逻辑}})}}
})

三、java后端

@Component
@Slf4j
public class WxAccessTokenUtil {@Value("${WX_APPID}")String APP_ID;@Value("${WX_SECREAT}")String SECREAT;@Value("${WX_TEMPLATE_ID}")String TEMPLATE_ID;public String getWxAccessToken(){String res = HttpClient.doGet("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+APP_ID+"&secret="+SECREAT);JSONObject jsonObject = JSON.parseObject(res);return jsonObject.getString("access_token");}public void sendReservationSubscribeMsg(String touser,String id,String apparatusName,String state){String token = getWxAccessToken();JSONObject jsonObject2 = new JSONObject();jsonObject2.put("access_token",token);jsonObject2.put("touser",touser);jsonObject2.put("template_id",TEMPLATE_ID);jsonObject2.put("page","/pages/appointment_detail/appointment_detail?id="+id);JSONObject data = new JSONObject();JSONObject thing2 = new JSONObject();thing2.put("value",apparatusName);data.put("thing2",thing2);JSONObject phrase3 = new JSONObject();phrase3.put("value",state);data.put("phrase3",phrase3);jsonObject2.put("data",data);String res = HttpClient.doPost("https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token="+token,jsonObject2.toString());log.warn("微信小程序订阅消息：{}",res);}
}

其中thing2、phrase3是模板的字段名，根据自己模板去修改即可

HttpClient.java

public class HttpClient {public static void main(String[] args) {String APP_ID = "xxx";String SECREAT = "xxx";String res = HttpClient.doGet("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+APP_ID+"&secret="+SECREAT);com.alibaba.fastjson.JSONObject jsonObject = JSON.parseObject(res);String token = jsonObject.getString("access_token");JSONObject jsonObject2 = new JSONObject();jsonObject2.put("access_token",token);jsonObject2.put("touser","xxxxx");jsonObject2.put("template_id","xxxx");jsonObject2.put("page","/pages/tabbar/mine/mine");JSONObject data = new JSONObject();JSONObject phrase1 = new JSONObject();phrase1.put("value","待审核");data.put("phrase1",phrase1);JSONObject thing2 = new JSONObject();thing2.put("value","已成功提交预约申请，请耐心等待审核。");data.put("thing2",thing2);jsonObject2.put("data",data);jsonObject2.put("miniprogram_state","trial");System.out.println(HttpClient.doPost("https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token="+token,jsonObject2.toString()));}public static String doGet(String httpurl) {HttpURLConnection connection = null;InputStream is = null;BufferedReader br = null;String result = null;// 返回结果字符串try {// 创建远程url连接对象URL url = new URL(httpurl);// 通过远程url连接对象打开一个连接，强转成httpURLConnection类connection = (HttpURLConnection) url.openConnection();// 设置连接方式：getconnection.setRequestMethod("GET");// 设置连接主机服务器的超时时间：15000毫秒connection.setConnectTimeout(15000);// 设置读取远程返回的数据时间：60000毫秒connection.setReadTimeout(60000);// 发送请求connection.connect();// 通过connection连接，获取输入流if (connection.getResponseCode() == 200) {is = connection.getInputStream();// 封装输入流is，并指定字符集br = new BufferedReader(new InputStreamReader(is, "UTF-8"));// 存放数据StringBuffer sbf = new StringBuffer();String temp = null;while ((temp = br.readLine()) != null) {sbf.append(temp);sbf.append("\r\n");}result = sbf.toString();}} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {// 关闭资源if (null != br) {try {br.close();} catch (IOException e) {e.printStackTrace();}}if (null != is) {try {is.close();} catch (IOException e) {e.printStackTrace();}}connection.disconnect();// 关闭远程连接}return result;}public static String doPost(String httpUrl, String param) {HttpURLConnection connection = null;InputStream is = null;OutputStream os = null;BufferedReader br = null;String result = null;try {URL url = new URL(httpUrl);// 通过远程url连接对象打开连接connection = (HttpURLConnection) url.openConnection();// 设置连接请求方式connection.setRequestMethod("POST");// 设置连接主机服务器超时时间：15000毫秒connection.setConnectTimeout(15000);// 设置读取主机服务器返回数据超时时间：60000毫秒connection.setReadTimeout(60000);// 默认值为：false，当向远程服务器传送数据/写数据时，需要设置为trueconnection.setDoOutput(true);// 默认值为：true，当前向远程服务读取数据时，设置为true，该参数可有可无connection.setDoInput(true);// 设置传入参数的格式:请求参数应该是 name1=value1&name2=value2 的形式。connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");// 设置鉴权信息：Authorization: Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0connection.setRequestProperty("Authorization", "Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0");// 通过连接对象获取一个输出流os = connection.getOutputStream();// 通过输出流对象将参数写出去/传输出去,它是通过字节数组写出的os.write(param.getBytes());// 通过连接对象获取一个输入流，向远程读取if (connection.getResponseCode() == 200) {is = connection.getInputStream();// 对输入流对象进行包装:charset根据工作项目组的要求来设置br = new BufferedReader(new InputStreamReader(is, "UTF-8"));StringBuffer sbf = new StringBuffer();String temp = null;// 循环遍历一行一行读取数据while ((temp = br.readLine()) != null) {sbf.append(temp);sbf.append("\r\n");}result = sbf.toString();}} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {// 关闭资源if (null != br) {try {br.close();} catch (IOException e) {e.printStackTrace();}}if (null != os) {try {os.close();} catch (IOException e) {e.printStackTrace();}}if (null != is) {try {is.close();} catch (IOException e) {e.printStackTrace();}}// 断开与远程地址url的连接connection.disconnect();}return result;}
}