Logica SMPP session.submitMulti（request）;

Question

我尝试使用“submitMulti（request）;”尝试发送多条消息方法。即使所有参数都已正确设置，控制台中也会显示“提交多操作faild.java.lang.NullPointerException”的错误消息。我需要快速回答。 这是我的代码。

        SubmitMultiSM request = new SubmitMultiSM();
        SubmitMultiSMResp response;

        for (int i=0; i<3; i++) {
            request.addDestAddress(new DestinationAddress("94710486836"););
        }

        // set other values
        request.setServiceType("CMT");
        request.setSourceAddr("94115933333");
        request.setReplaceIfPresentFlag(replaceIfPresentFlag);
        request.setShortMessage("Test");
        request.setScheduleDeliveryTime(scheduleDeliveryTime);
        request.setValidityPeriod(validityPeriod);
        request.setEsmClass(esmClass);
        request.setProtocolId(protocolId);
        request.setPriorityFlag(priorityFlag);
        request.setRegisteredDelivery(registeredDelivery);
        request.setDataCoding(dataCoding);
        request.setSmDefaultMsgId(smDefaultMsgId);

        response = session.submitMulti(request);

谢谢。