试了下阿里云的OPEN Api

逐渐理解open api的意义，试了下阿里云的续费接口，续费一个月

 package com.test;

 /**
 * @author
 * @date 2018/12/05
 */
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.serializer.SerializerFeature;
 import com.aliyuncs.AcsRequest;
 import com.aliyuncs.AcsResponse;
 import com.aliyuncs.DefaultAcsClient;
 import com.aliyuncs.IAcsClient;
 import com.aliyuncs.ecs.model.v20140526.DescribeInstancesRequest;
 import com.aliyuncs.ecs.model.v20140526.DescribeInstancesResponse;
 import com.aliyuncs.ecs.model.v20140526.RenewInstanceRequest;
 import com.aliyuncs.exceptions.ClientException;
 import com.aliyuncs.exceptions.ServerException;
 import com.aliyuncs.profile.DefaultProfile;
 import com.aliyuncs.profile.IClientProfile;

 import java.util.*;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;

 public class  AliyunRenewInstancesExample {

     private String accessKeyId  = "your-accessKeyId";
     private String accessSecret = "your-accessSecret";

     /**
      * 实例所属的地域ID
      */
     private String regionId = "cn-beijing";
     /**
      * 指定的需要续费的实例 ID
      */
     private String[] instanceIds = new String[] {"i-m************"};
     /**
      * 预付费续费时长
      */
     private Integer period = 1;
     /**
      * 续费时长单位，取值：Week/Month
      */
     private String periodUnit = "Month";

     private Map<String, InstanceExpiredModel> instanceExpiredModelMap = new HashMap<String, InstanceExpiredModel>();
     private static final ExecutorService RENEW_INSTANCE_POOL = Executors.newFixedThreadPool(500);
     private static final Integer CHECK_EXPIRED_TIME_OUT_MILLISECOND = 60 * 1000;
     private static final Integer CHECK_EXPIRED_TIME_INTERVAL_MILLISECOND = 2 * 1000;
     private static final String INSTANCE_CHARGE_TYPE_PREPAID = "PrePaid";
     private static final String DESCRIBE_INSTANCES_FILTER_KEY_EXPIRED_START_TIME = "ExpiredStartTime";
     private static final String DESCRIBE_INSTANCES_FILTER_KEY_EXPIRED_END_TIME = "ExpiredEndTime";

     public static void main(String[] args) {
         /**
          * 使用须知：
          * 调用 OpenAPI 续费会自动扣费，请谨慎调用
          * 您的账号必须支持账号余额支付或信用支付，请确保金额充足
          *
          * 调用续费API后会对 新的到期时间 和 原始的到期时间 进行比较并分别输出成功和失败的实例
          */
         new AliyunRenewInstancesExample().callRenewInstance();
     }

     private void callRenewInstance() {
         /**
          * 若需查询需要续费的实例，可查看 describeNeedRenewInstances 方法
          */
         //List<String> needRenewInstanceIds = describeNeedRenewInstances();
         List<String> instanceIdList = Arrays.asList(instanceIds);
         List<DescribeInstancesResponse.Instance> instances = describeInstances(instanceIdList);
         if (!checkInstanceIds(instances, instanceIdList)) {
             return;
         }
         updateInstanceOriginalExpiredTime(instances);
         for (final String instanceId : instanceIdList) {
             RENEW_INSTANCE_POOL.execute(new Runnable() {
                 public void run() {
                     RenewInstanceRequest request = new RenewInstanceRequest();
                     request.setRegionId(regionId);
                     request.setInstanceId(instanceId);
                     request.setPeriod(period);
                     request.setPeriodUnit(periodUnit);
                     callOpenApi(request, instanceExpiredModelMap.get(instanceId));
                 }
             });
         }
         try {
             RENEW_INSTANCE_POOL.shutdown();
             RENEW_INSTANCE_POOL.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
         } catch (InterruptedException e) {
             e.printStackTrace();
         }
         checkInstancesExpiredTime(instanceIdList);
     }
     /**
      * 每2秒中检查一次实例的到期时间，超时时间设为1分钟
      *
      * @param instanceIds 需要检查的实例ID
      */
     private void checkInstancesExpiredTime(List<String> instanceIds) {
         Long startTime = System.currentTimeMillis();
         for (;;) {
             boolean allCompleted = true;
             Long timeStamp = System.currentTimeMillis();
             updateInstanceNewExpiredTime(instanceIds);
             for (String instanceId : instanceExpiredModelMap.keySet()) {
                 InstanceExpiredModel instanceExpiredModel = instanceExpiredModelMap.get(instanceId);
                 if (instanceExpiredModel.newExpiredTime == null && instanceExpiredModel.errorCode == null) {
                     allCompleted = false;
                 }
             }
             if (allCompleted) {
                 logRenewResult();
                 return;
             }
             if (timeStamp - startTime > CHECK_EXPIRED_TIME_OUT_MILLISECOND) {
                 logInfo(String.format("Check instance new expiredTime timeout. Because it takes too much time, View the result detail: %s",
                                 JSON.toJSONString(instanceExpiredModelMap, SerializerFeature.PrettyFormat)));
                 return;
             }
             sleepSomeTime(CHECK_EXPIRED_TIME_INTERVAL_MILLISECOND);
         }
     }

     private boolean checkInstanceIds(List<DescribeInstancesResponse.Instance> instances,
                                      List<String> instanceIds) {
         if (instances.size() != instanceIds.size()) {
             List<String> responseInstanceIds = new ArrayList<String>();
             List<String> invalidInstanceIds = new ArrayList<String>();
             for (DescribeInstancesResponse.Instance instance : instances) {
                 responseInstanceIds.add(instance.getInstanceId());
             }
             for (String instanceId : instanceIds) {
                 if (!responseInstanceIds.contains(instanceId)) {
                     invalidInstanceIds.add(instanceId);
                 }
             }
             logInfo(String.format("Fail. CheckInstanceIds failure. Invalid InstanceIds: %s",
                 JSON.toJSONString(invalidInstanceIds)));
             return false;
         }
         return true;
     }

     /**
      * 记录 instance 原始到期时间，以便在调用续费 OpenAPI 后 check 到期时间是否发生变化来判断续费是否成功
      *
      * @param instances
      * @return
      */
     private boolean updateInstanceOriginalExpiredTime(List<DescribeInstancesResponse.Instance> instances) {
         for (DescribeInstancesResponse.Instance instance : instances) {
             InstanceExpiredModel instanceExpiredModel = new InstanceExpiredModel();
             instanceExpiredModel.instanceId = instance.getInstanceId();
             instanceExpiredModel.originalExpiredTime = instance.getExpiredTime();
             instanceExpiredModelMap.put(instance.getInstanceId(), instanceExpiredModel);
         }
         return true;
     }

     private void updateInstanceNewExpiredTime(List<String> instanceIds) {
         List<DescribeInstancesResponse.Instance> instances = describeInstances(instanceIds);
         for (DescribeInstancesResponse.Instance instance : instances) {
             InstanceExpiredModel instanceExpiredModel = instanceExpiredModelMap.get(instance
                     .getInstanceId());
             if (!instance.getExpiredTime().equals(instanceExpiredModel.originalExpiredTime)) {
                 instanceExpiredModel.newExpiredTime = instance.getExpiredTime();
             }
         }
     }

     private List<DescribeInstancesResponse.Instance> describeInstances(List<String> instanceIds) {
         int offset = 0;
         int pageSize = 100;
         int totalCount = instanceIds.size();
         List<DescribeInstancesResponse.Instance> instances = new ArrayList<DescribeInstancesResponse.Instance>();
         while (offset < totalCount) {
             DescribeInstancesRequest describeInstancesRequest = new DescribeInstancesRequest();
             describeInstancesRequest.setRegionId(regionId);
             describeInstancesRequest.setPageSize(pageSize);
             describeInstancesRequest.setInstanceChargeType(INSTANCE_CHARGE_TYPE_PREPAID);
             describeInstancesRequest.setInstanceIds(JSON.toJSONString(instanceIds.subList(offset,
                     Math.min(totalCount, offset + pageSize))));
             DescribeInstancesResponse response = callOpenApi(describeInstancesRequest, null);
             if (response == null || response.getInstances().size() == 0) {
                 logInfo(String.format("Fail. Can not find instance. InstanceIds: %s", JSON.toJSONString(instanceIds)));
                 return instances;
             }
             instances.addAll(response.getInstances());
             offset += response.getPageSize();
         }
         return instances;
     }

     private Map<String, InstanceExpiredModel> getFailedInstances() {
         Map<String, InstanceExpiredModel> failedInstances = new HashMap<String, InstanceExpiredModel>();
         for (String instanceId : instanceExpiredModelMap.keySet()) {
             InstanceExpiredModel instanceExpiredModel = instanceExpiredModelMap.get(instanceId);
             if (instanceExpiredModel.errorCode != null) {
                 failedInstances.put(instanceId, instanceExpiredModel);
             }
         }
         return failedInstances;
     }

     private Map<String, InstanceExpiredModel> getSuccessInstances() {
         Map<String, InstanceExpiredModel> successInstances = new HashMap<String, InstanceExpiredModel>();
         for (String instanceId : instanceExpiredModelMap.keySet()) {
             InstanceExpiredModel instanceExpiredModel = instanceExpiredModelMap.get(instanceId);
             if (instanceExpiredModel.errorCode == null
                     && instanceExpiredModel.newExpiredTime != null
                     && !instanceExpiredModel.originalExpiredTime
                             .equals(instanceExpiredModel.newExpiredTime)) {
                 successInstances.put(instanceId, instanceExpiredModel);
             }
         }
         return successInstances;
     }

     /**
      * 调用OpenAPI的方法，这里进行了错误处理
      *
      * @param request AcsRequest, Open API的请求
      * @param <T> AcsResponse 请求所对应返回值
      * @return 返回OpenAPI的调用结果. 如果调用失败，则会返回null
      */
     private <T extends AcsResponse> T callOpenApi(AcsRequest<T> request, BaseResult errorResult) {
         IAcsClient client = initClient();
         try {
             T response = client.getAcsResponse(request, false, 0);
             logInfo(String.format("Success. OpenAPI Action: %s call successfully.",
                     request.getActionName()));
             return response;
         } catch (ClientException e) {
             buildErrResult(errorResult, e);
         }
         return null;
     }

     /**
      * 需要填充账号的AccessKey ID，以及账号的Access Key Secret
      */
     private IAcsClient initClient() {
         IClientProfile profile = DefaultProfile.getProfile(regionId, accessKeyId, accessSecret);
         return new DefaultAcsClient(profile);
     }

     private void logRenewResult() {
         logInfo("-------- Renew Instances Result --------");
         Map<String, InstanceExpiredModel> failedInstances = getFailedInstances();
         if (failedInstances.size() > 0) {
             logInfo(String.format("Fail. Some instances renew failure, result: %s",
                 JSON.toJSONString(failedInstances, SerializerFeature.PrettyFormat)));
             Map<String, InstanceExpiredModel> successInstances = getSuccessInstances();
             if (successInstances.size() > 0) {
                 logInfo(String.format("Success. Some instances renew success, result: %s",
                     JSON.toJSONString(successInstances, SerializerFeature.PrettyFormat)));
             }
         } else {
             logInfo(String.format("Success. RenewInstance result: %s", JSON.toJSONString(
                 instanceExpiredModelMap, SerializerFeature.PrettyFormat)));
         }
     }

     private static void sleepSomeTime(int sleepTime) {
         try {
             Thread.sleep(sleepTime);
         } catch (InterruptedException e) {
             e.printStackTrace();
         }
     }

     private static void buildErrResult(BaseResult errResult, ClientException e) {
         if (errResult != null) {
             errResult.errorCode = e.getErrCode();
             errResult.requestId = e.getRequestId();
         }
         if (e instanceof ServerException) {
             logInfo(String.format("Fail. Something with your connection with Aliyun go incorrect. ErrorCode: %s",
                 e.getErrCode()));
         } else {
             logInfo(String.format("Fail. Business error. ErrorCode: %s, RequestId: %s",
                 e.getErrCode(), e.getRequestId()));
         }
     }

     private static void logInfo(String message) {
         System.out.println(message);
     }

     private List<String> describeNeedRenewInstances() {
         String instanceExpiredStartTimeUtc = "2018-10-21T16:00Z";
         String instanceExpiredEndTimeUtc = "2018-12-01T16:00Z";
         List<String> instanceIds = new ArrayList<String>();

         int pageSize = 100;
         int pageNumber = 1;
         int totalCount = 1;
         while (instanceIds.size() < totalCount) {
             DescribeInstancesRequest describeInstancesRequest = new DescribeInstancesRequest();
             describeInstancesRequest.setRegionId(regionId);
             describeInstancesRequest.setFilter3Key(DESCRIBE_INSTANCES_FILTER_KEY_EXPIRED_START_TIME);
             describeInstancesRequest.setFilter3Value(instanceExpiredStartTimeUtc);
             describeInstancesRequest.setFilter4Key(DESCRIBE_INSTANCES_FILTER_KEY_EXPIRED_END_TIME);
             describeInstancesRequest.setFilter4Value(instanceExpiredEndTimeUtc);
             describeInstancesRequest.setInstanceChargeType(INSTANCE_CHARGE_TYPE_PREPAID);
             describeInstancesRequest.setPageSize(pageSize);
             describeInstancesRequest.setPageNumber(pageNumber);
             DescribeInstancesResponse response = callOpenApi(describeInstancesRequest, null);
             if (response == null || response.getTotalCount() == 0) {
                 logInfo("Fail. DescribeNeedRenewInstances occurred error or response.getTotalCount() == 0");
                 return instanceIds;
             }
             for (DescribeInstancesResponse.Instance instance : response.getInstances()) {
                 instanceIds.add(instance.getInstanceId());
             }
             totalCount = response.getTotalCount();
             pageNumber++;
         }
         logInfo(String.format("Success. DescribeNeedRenewInstances result: %s", instanceIds.toString()));
         return instanceIds;
     }

     class BaseResult {
         public String errorCode;
         public String requestId;
     }

     class InstanceExpiredModel extends BaseResult {
         public String instanceId;
         public String originalExpiredTime;
         public String newExpiredTime;
     }
 }

执行结果，用账户余额支付了一月个的续费

Success. OpenAPI Action: DescribeInstances call successfully.
Success. OpenAPI Action: RenewInstance call successfully.
Success. OpenAPI Action: DescribeInstances call successfully.
-------- Renew Instances Result --------
Success. RenewInstance result: {
    "i-m**********":{
        "instanceId":"i-m************",
        "newExpiredTime":"2019-01-05T16:00Z",
        "originalExpiredTime":"2018-12-05T16:00Z"
    }
}