Alibaba Cloud SDK for Java

<dependency>
    <groupId>com.aliyun</groupId>
    <artifactId>aliyun-java-sdk-core</artifactId>
    <version>[4.4.9,5.0.0)</version>
</dependency>
<dependency>
    <groupId>com.aliyun</groupId>
    <artifactId>aliyun-java-sdk-ecs</artifactId>
    <version>[4.16.0,5.0.0)</version>
</dependency>

<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.5</version>
</dependency>
<dependency>
    <groupId>io.opentracing</groupId>
    <artifactId>opentracing-api</artifactId>
    <version>0.33.0</version>
</dependency>
<dependency>
    <groupId>io.opentracing</groupId>
    <artifactId>opentracing-util</artifactId>
    <version>0.33.0</version>
</dependency>

package com.testprogram;
import com.aliyuncs.profile.DefaultProfile;
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.IAcsClient;
import com.aliyuncs.exceptions.ClientException;
import com.aliyuncs.exceptions.ServerException;
import com.aliyuncs.ecs.model.v20140526.*;
public class Main {
    public static void main(String[] args) {
         // 创建DefaultAcsClient实例并初始化
        DefaultProfile profile = DefaultProfile.getProfile(
            "<your-region-id>",          // 地域ID
            "<your-access-key-id>",      // RAM账号的AccessKey ID
            "<your-access-key-secret>"); // RAM账号Access Key Secret
        IAcsClient client = new DefaultAcsClient(profile);
         // 创建API请求并设置参数
        DescribeInstancesRequest request = new DescribeInstancesRequest();
        request.setPageSize(10);
        // 发起请求并处理应答或异常
        DescribeInstancesResponse response;
        try {
            response = client.getAcsResponse(request);
            for (DescribeInstancesResponse.Instance instance:response.getInstances()) {
                System.out.println(instance.getPublicIpAddress());
            }
        } catch (ServerException e) {
            e.printStackTrace();
         } catch (ClientException e) {
            e.printStackTrace();
        }
    }
}