fcm的java发送代码

public static void send(String urlPath, String content) throws JSONException {         try {             URL url = new URL(urlPath);             HttpURLConnection connection = (HttpURLConnection) url.openConnection();             connection.setDoOutput(true);             connection.setDoInput(true);             connection.setRequestMethod(“POST”);             connection.setUseCaches(false);             connection.setInstanceFollowRedirects(true);             connection.setRequestProperty(“Content-Type”, “application/json”);             connection.setRequestProperty(“Authorization”, “”);             connection.connect();             DataOutputStream out = new DataOutputStream(connection.getOutputStream());             JSONObject json = new JSONObject();              json.put(“to”, “erUretmvVrM:APA91bEWrUIsl1KawvionLeu3YkBqrH2cYKoeAy7Pc16J7xZcNVwvzQKbPYc14K90YBcbysxkkFzr7HUKX7vj0T9XrDbD3uFsI7v4J3LZmtwiGe2PsK49JcnLyJMiYmFz3wnS9J6Ycot”);              JSONObject info = new JSONObject();             info.put(“title”, “Notificatoin Title”); //通知标题             info.put(“body”, “Hello Test notification”); // Notification body              json.put(“notification”, info);             out.writeBytes(json.toString());             out.flush();             out.close();             BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));             String lines;             StringBuffer sb = new StringBuffer(“”);             while ((lines = reader.readLine()) != null) {                 lines = new String(lines.getBytes(), “utf-8”);                 sb.append(lines);             }             System.out.println(sb);             reader.close();             // 断开连接             connection.disconnect();         } catch (MalformedURLException e) {             e.printStackTrace();         } catch (UnsupportedEncodingException e) {             e.printStackTrace();         } catch (IOException e) {             e.printStackTrace();         }

}