Java implements SMS sending and receiving functions of form data

Java implements the SMS sending and receiving function of form data

With the popularity of mobile Internet, SMS has become one of the important communication methods in people's daily life. In some application scenarios, form data needs to be sent to designated recipients via SMS, and SMS replies from users need to be received. This article will introduce how to use Java to implement this function and provide corresponding code examples.

1. Sending SMS

To implement the SMS sending function, we need to send the SMS content to the SMS gateway through the network interface, and then the SMS gateway sends the SMS to the target mobile phone. In Java, you can use the HTTP interface or the SMTP interface to accomplish this task.

The following is a sample code for sending text messages using the HTTP interface:

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

public class SmsSender {
    public static void main(String[] args) {
        try {
            String phoneNumber = "手机号码";
            String message = "短信内容";
            
            String username = "用户名";
            String password = "密码";
            
            String urlString = "http://sms-api.example.com/send?"
                    + "username=" + URLEncoder.encode(username, "UTF-8")
                    + "&password=" + URLEncoder.encode(password, "UTF-8")
                    + "&phoneNumber=" + URLEncoder.encode(phoneNumber, "UTF-8")
                    + "&message=" + URLEncoder.encode(message, "UTF-8");
            
            URL url = new URL(urlString);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String response;
            while ((response = reader.readLine()) != null) {
                System.out.println(response);
            }
            
            reader.close();
            
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

In the code, use HttpURLConnection to create an HTTP request and pass the parameters to SMS gateway. Among them, username and password are the account number and password of the SMS gateway, phoneNumber is the target mobile phone number, and message is the text message content. The result of sending SMS can be obtained by calling connection.getInputStream().

2. Receiving text messages

To receive text messages, we need to use the API provided by the SMS gateway to monitor and process the reception of text messages. Depending on the SMS gateway, the way to receive SMS messages is also different.

The following is a sample code for receiving text messages using the SMPP protocol:

import com.cloudhopper.smpp.SmppBindType;
import com.cloudhopper.smpp.SmppSession;
import com.cloudhopper.smpp.pdu.BindReceiver;
import com.cloudhopper.smpp.pdu.DeliverSm;
import com.cloudhopper.smpp.pdu.EnquireLink;
import com.cloudhopper.smpp.pdu.EnquireLinkResp;
import com.cloudhopper.smpp.pdu.SubmitSm;
import com.cloudhopper.smpp.pdu.SubmitSmResp;
import com.cloudhopper.smpp.pdu.Unbind;
import com.cloudhopper.smpp.pdu.UnbindResp;
import com.cloudhopper.smpp.util.DeliveryReceipt;
import com.cloudhopper.smpp.util.DeliveryReceiptException;
import com.cloudhopper.smpp.util.RandomUtil;
import com.cloudhopper.smpp.util.SmppSessionUtil;

public class SmsReceiver {
    public static void main(String[] args) {
        try {
            String hostname = "短信网关地址";
            int port = 2775;
            
            String username = "用户名";
            String password = "密码";
            
            SmppSession session = SmppSessionUtil.bind(hostname, port, SmppBindType.RECEIVER, username, password);
            
            boolean keepRunning = true;
            while (keepRunning) {
                EnquireLinkResp enquireLinkResp = session.enquireLink(new EnquireLink(), 5000);
                if (enquireLinkResp == null) {
                    System.out.println("连接已断开，重新绑定");
                    session.unbind(5000);
                    session = SmppSessionUtil.bind(hostname, port, SmppBindType.RECEIVER, username, password);
                } else {
                    Thread.sleep(1000);
                }
            }
            
            session.unbind(5000);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

In the code, the CloudHopper library is used to implement the operation of the SMPP protocol. First use the SmppSessionUtil.bind() method to establish a connection with the SMS gateway, and then call the session.enquireLink() method cyclically to maintain the heartbeat connection with the SMS gateway. If the heartbeat connection is disconnected, rebind it.

In order to obtain the text message content and sender information, it is also necessary to add processing of the DeliverSm message in the loop. Depending on the SMS gateway, the message format and method of retrieval may vary.

3. Summary

Through the introduction of this article, we have learned how to use Java to implement the SMS sending and receiving function of form data. To send SMS messages, you can use the HTTP interface or SMTP interface to communicate with the SMS gateway; to receive SMS messages, you can use the APIs provided by different SMS gateways to monitor and process the reception of SMS messages.

However, it should be noted that the SMS sending and receiving functions involve network communication and security issues, and need to be configured in cooperation with the SMS gateway provider, and pay attention to the compliance with relevant laws and regulations.

I hope this article will help you understand the SMS sending and receiving functions of form data in Java. If you want to know more, you can check the documentation and related development guides of specific SMS gateways.

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