java.lang.ClassCastException:com.olm.om.domain.User不能强制转换为java.util.Map @Async @凌驾 所有用户的公共无效SendPushNotifiAction（用户用户，可选allUsersForSendingNotification）{ StringBuilder收件人=新StringBuilder（“”）； if（allUsersForSendingNotification.isPresent（））{ 对于（映射数据：allUsersForSendingNotification.get（））{ logger.info（“发送电子邮件至”+data.get（“电子邮件”））； recipients.append（data.get（“email”））.append（“，”）； MailModel MailModel=new MailModel（“通知：新用户已注册在线制造，请检查并创建请求。”，“new_User_Notification.html”）； mailModel.addData（“用户”，用户）； mailModel.addTo（data.get（“email”）.toString（））； this.emailService.sendmail（mailModel）； } } MailModel MailModel=new MailModel（“通知：在线制造中提出了新请求，并已向目标用户发送通知。”，“new_request_olm.html”）； mailModel.addTo（“support@onlinemanufacturing.in"); mailModel.addData（“用户”，用户）； addData（“targetedUsers”，recipients.toString（））； this.emailService.sendmail（mailModel）； }

错误来自此代码。。我在新用户注册后发送了一封邮件，在运行它的给定错误后，如java.lang.ClassCastException:com.olm.om.domain.User无法转换为java.util.Map

位于com.olm.om.notification.service.EmailNotificationService.SendPushNotificationForAllUsers（EmailNotificationService）

错误来自以下代码：-

 @Async
    @Override
    public void sendPushNotifactionForAllUsers(User user, Optional<List<Map<String, Object>>> allUsersForSendingNotification) {
        StringBuilder recipients = new StringBuilder("");
        if(allUsersForSendingNotification.isPresent()) {
            for (Map<String,Object> data : allUsersForSendingNotification.get()) { 
                logger.info("Sending email to " + data.get("email"));
                recipients.append(data.get("email")).append(", ");
                  MailModel mailModel = new MailModel("Notification : New User has been Register On Online Manufacturing Please Check and Create Request.", "new_User_notification.html");
                  mailModel.addData("user", user);
                  mailModel.addTo(data.get("email").toString());
                  this.emailService.sendEmail(mailModel);
              }
        }
            MailModel mailModel = new MailModel("Notification : New request has been raised in Online Manufacturing and notification has been sent to targetted users.", "new_request_olm.html");
            mailModel.addTo("support@onlinemanufacturing.in");
            mailModel.addData("user" , user);
            mailModel.addData("targettedUsers", recipients.toString());
            this.emailService.sendEmail(mailModel);
    }

（映射数据：allUsersForSendingNotification.get（））的 该代码已从该代码实现

> for (Map<String,Object> data : allUsersForSendingNotification.get()) 
                  

@Async
公共无效sendPushNotifications（用户）{
可选的allUsersForSendingNotification=this.getAllUsersForSendingNotification（）；
此.emailNotificationService.SendPushNotifiActionforAllUsers（用户，allUsersForSendingNotification）；}
公共可选getAllUsersForSendingNotification（）{
返回可选的.of（this.userDao.getUserByUserName2（））；
}

请在您创建\填充此

可选allUsersForSendingNotification的位置共享一段代码

@Async
    public void sendPushNotifications(User user) {
        Optional<List<Map<String, Object>>> allUsersForSendingNotification = this.getAllUsersForSendingNotification();
        this.emailNotificationService.sendPushNotifactionForAllUsers(user, allUsersForSendingNotification);}

 public Optional<List<Map<String, Object>>> getAllUsersForSendingNotification() {
            return Optional.of(this.userDao.getUserByUserName2());
     }