# 示例：Python发送短信前检查
def send_sms(phone, content):
    # 检查手机号格式
    if not re.match(r'^1[3-9]\d{9}$', phone):
        return {"code": 400, "message": "手机号格式错误"}
    
    # 检查敏感词
    if contains_sensitive_word(content):
        return {"code": 400, "message": "内容包含敏感词"}
    
    # 检查发送频率
    if check_send_frequency(phone) > 5:
        return {"code": 429, "message": "发送频率过高"}
    
    # 实际发送逻辑
    # ...

// Java示例：使用HTTP客户端发送短信
public class SmsSender {
    private static final String API_URL = "https://api.smsprovider.com/v2/send";
    private static final String API_KEY = "your_api_key";
    private static final String SECRET = "your_api_secret";
    
    public static String sendSms(String phone, String content) throws IOException {
        HttpClient client = HttpClient.newHttpClient();
        
        // 构建请求参数
        Map<String, String> params = new HashMap<>();
        params.put("phone", phone);
        params.put("content", content);
        params.put("sign", generateSign(params));
        
        // 构建请求
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(API_URL))
                .header("Content-Type", "application/json")
                .POST(HttpRequest.BodyPublishers.ofString(new JSONObject(params).toString()))
                .build();
        
        // 发送请求
        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
        return response.body();
    }
    
    private static String generateSign(Map<String, String> params) {
        // 实现签名算法
        // ...
    }
}