java写一个发送短信的工具类

下面是一个简单的Java发送短信的工具类：

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

public class SMSUtil {

    private static final String SMS_URL = "http://sms.com/sendSMS.php";
    private static final String SMS_USERNAME = "your_username";
    private static final String SMS_PASSWORD = "your_password";

    public static void sendSMS(String phoneNumber, String message) throws Exception {
        // Encode phone number and message
        String encodedPhoneNumber = URLEncoder.encode(phoneNumber, "UTF-8");
        String encodedMessage = URLEncoder.encode(message, "UTF-8");

        // Create the SMS URL
        String smsUrl = SMS_URL + "?username=" + SMS_USERNAME + "&password=" + SMS_PASSWORD + "&phone=" + encodedPhoneNumber + "&message=" + encodedMessage;

        // Send the SMS
        URL url = new URL(smsUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");

        // Read the response
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String response = reader.readLine();
        reader.close();

        // Check the response
        if (!response.startsWith("OK")) {
            throw new Exception("Failed to send SMS: " + response);
        }
    }
}

使用方式：

try {
    SMSUtil.sendSMS("1234567890", "Hello, World!");
    System.out.println("SMS sent successfully");
} catch (Exception e) {
    System.err.println("Error sending SMS: " + e.getMessage());
}

注意：这个工具类是一个简单的示例，实际使用时需要替换SMS_URL、SMS_USERNAME和SMS_PASSWORD为你自己的信息。另外，这个工具类只支持GET方式发送短信，实际使用时可能需要根据短信服务商的要求修改为POST方式。