java.util.concurrent.ExecutionException: com.aliyun.sdk.gateway.pop.exception.PopClientException

问题：大概的意思就是说没有拿到阿里云的Id和密钥

java.util.concurrent.ExecutionException: com.aliyun.sdk.gateway.pop.exception.PopClientException: (
Code: MissingAccessKeyId
Message: code: 400, AccessKeyId is mandatory for this action. request id: 89B9CEC0-82FE-506A-AFE4-8F78CAF6D78C
Request ID: 89B9CEC0-82FE-506A-AFE4-8F78CAF6D78C
Description: null)

简单，其他代码不用动，只需要将代码一改成代码二即可：

// 配置身份验证信息,包括AccessKey、AccessKeySecret、Token
//accessKeyId和accessKeySecret在数据库存储好，直接从数据库获取;也可以配置在yml文件中通过变量的方式获取
StaticCredentialProvider provider = StaticCredentialProvider.create(Credential.builder()
                .accessKeyId(System.getenv(accessKeyId))
                .accessKeySecret(System.getenv(accessKeySecret))
                .build());

也就是将System.getenv(accessKeyId)和System.getenv(accessKeySecret)改成accessKeyId和accessKeySecret即可

StaticCredentialProvider provider = StaticCredentialProvider.create(Credential.builder()
              .accessKeyId(accessKeyId)
              .accessKeySecret(accessKeySecret)
              .build());

重新启动编译，应该就可以了

发送短信验证码的代码我是直接从阿里云copy下来的小demo

发送短信：SendSms_短信服务_API调试-阿里云OpenAPI开发者门户 (aliyun.com)

demo如下：

// This file is auto-generated, don't edit it. Thanks.
package demo;

import com.aliyun.auth.credentials.Credential;
import com.aliyun.auth.credentials.provider.StaticCredentialProvider;
import com.aliyun.core.http.HttpClient;
import com.aliyun.core.http.HttpMethod;
import com.aliyun.core.http.ProxyOptions;
import com.aliyun.httpcomponent.httpclient.ApacheAsyncHttpClientBuilder;
import com.aliyun.sdk.service.dysmsapi20170525.models.*;
import com.aliyun.sdk.service.dysmsapi20170525.*;
import com.google.gson.Gson;
import darabonba.core.RequestConfiguration;
import darabonba.core.client.ClientOverrideConfiguration;
import darabonba.core.utils.CommonUtil;
import darabonba.core.TeaPair;

//import javax.net.ssl.KeyManager;
//import javax.net.ssl.X509TrustManager;
import java.net.InetSocketAddress;
import java.time.Duration;
import java.util.*;
import java.util.concurrent.CompletableFuture;
import java.io.*;

public class SendSms {
    public static void main(String[] args) throws Exception {

        // HttpClient Configuration
        /*HttpClient httpClient = new ApacheAsyncHttpClientBuilder()
                .connectionTimeout(Duration.ofSeconds(10)) // Set the connection timeout time, the default is 10 seconds
                .responseTimeout(Duration.ofSeconds(10)) // Set the response timeout time, the default is 20 seconds
                .maxConnections(128) // Set the connection pool size
                .maxIdleTimeOut(Duration.ofSeconds(50)) // Set the connection pool timeout, the default is 30 seconds
                // Configure the proxy
                .proxy(new ProxyOptions(ProxyOptions.Type.HTTP, new InetSocketAddress("<your-proxy-hostname>", 9001))
                        .setCredentials("<your-proxy-username>", "<your-proxy-password>"))
                // If it is an https connection, you need to configure the certificate, or ignore the certificate(.ignoreSSL(true))
                .x509TrustManagers(new X509TrustManager[]{})
                .keyManagers(new KeyManager[]{})
                .ignoreSSL(false)
                .build();*/

        // Configure Credentials authentication information, including ak, secret, token
        StaticCredentialProvider provider = StaticCredentialProvider.create(Credential.builder()
                // Please ensure that the environment variables ALIBABA_CLOUD_ACCESS_KEY_ID and ALIBABA_CLOUD_ACCESS_KEY_SECRET are set.
                .accessKeyId(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"))
                .accessKeySecret(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"))
                //.securityToken(System.getenv("ALIBABA_CLOUD_SECURITY_TOKEN")) // use STS token
                .build());

        // Configure the Client
        AsyncClient client = AsyncClient.builder()
                .region("cn-beijing-finance-1") // Region ID
                //.httpClient(httpClient) // Use the configured HttpClient, otherwise use the default HttpClient (Apache HttpClient)
                .credentialsProvider(provider)
                //.serviceConfiguration(Configuration.create()) // Service-level configuration
                // Client-level configuration rewrite, can set Endpoint, Http request parameters, etc.
                .overrideConfiguration(
                        ClientOverrideConfiguration.create()
                                  // Endpoint 请参考 https://api.aliyun.com/product/Dysmsapi
                                .setEndpointOverride("dysmsapi.aliyuncs.com")
                        //.setConnectTimeout(Duration.ofSeconds(30))
                )
                .build();

        // Parameter settings for API request
        SendSmsRequest sendSmsRequest = SendSmsRequest.builder()
                .phoneNumbers("111111")
                .signName("1")
                .templateCode("SMS_287670657")
                .templateParam("{\"code\":\"1234\"}")
                // Request-level configuration rewrite, can set Http request parameters, etc.
                // .requestConfiguration(RequestConfiguration.create().setHttpHeaders(new HttpHeaders()))
                .build();

        // Asynchronously get the return value of the API request
        CompletableFuture<SendSmsResponse> response = client.sendSms(sendSmsRequest);
        // Synchronously get the return value of the API request
        SendSmsResponse resp = response.get();
        System.out.println(new Gson().toJson(resp));
        // Asynchronous processing of return values
        /*response.thenAccept(resp -> {
            System.out.println(new Gson().toJson(resp));
        }).exceptionally(throwable -> { // Handling exceptions
            System.out.println(throwable.getMessage());
            return null;
        });*/

        // Finally, close the client
        client.close();
    }

}