tencent cloud

import com.tencentcloudapi.common.Credential;
import com.tencentcloudapi.common.exception.TencentCloudSDKException;
// Import the client of the corresponding product module
import com.tencentcloudapi.cvm.v20170312.CvmClient;
// Import the request response class corresponding to the request API
import com.tencentcloudapi.cvm.v20170312.models.DescribeInstancesRequest;
import com.tencentcloudapi.cvm.v20170312.models.DescribeInstancesResponse;
import com.tencentcloudapi.cvm.v20170312.models.Filter;
// Import the optional configuration classes
import com.tencentcloudapi.common.profile.ClientProfile;
import com.tencentcloudapi.common.profile.HttpProfile;
import com.tencentcloudapi.common.profile.Language;
public class DescribeInstances {
     public static void main(String[] args) {
         try {
             // Instantiate an authentication object. Pass in `secretId` and `secretKey` of your Tencent Cloud account as the input parameters and keep them confidential
             Credential cred = new Credential("secretId", "secretKey");
             // (Optional) Instantiate an HTTP option
             HttpProfile httpProfile = new HttpProfile();
             // Starting from v3.1.16, set up an HTTP proxy separately
             // httpProfile.setProxyHost("real proxy ip");
             // httpProfile.setProxyPort(real proxy port);
             httpProfile.setReqMethod("GET"); // GET request (POST request by default)
             httpProfile.setProtocol("https://");  // Please select a protocol (https:// or http://). HTTP is supported if the network environment has access to the public network, and HTTPS is used by default
             httpProfile.setConnTimeout(30); // Specify the request connection timeout value in seconds. The default value is 60s
             httpProfile.setWriteTimeout(30);  // Set the write timeout period in seconds. The default value is 0s
             httpProfile.setReadTimeout(30);  // Set the read timeout period in seconds. The default value is 0s
             httpProfile.setEndpoint("cvm.ap-shanghai.tencentcloudapi.com"); // Specify the endpoint. If you do not specify the endpoint, nearby access is enabled by default
             // Instantiate a client option (optional; skip if no special requirements are present)
             ClientProfile clientProfile = new ClientProfile();
             clientProfile.setSignMethod("HmacSHA256"); // Specify the signature algorithm (HmacSHA256 by default)
             // Starting from v3.1.80, the SDK supports printing logs.
             clientProfile.setHttpProfile(httpProfile);
             clientProfile.setDebug(true);
             // Starting from v3.1.16, the common parameter `Language` can be set, which is not passed in by default. You can select `ZH_CN` or `EN_US`
             clientProfile.setLanguage(Language.EN_US);
             // Instantiate the client object of the requested product (with CVM as an example). `clientProfile` is optional
             CvmClient client = new CvmClient(cred, "ap-shanghai", clientProfile);
             // Instantiate a CVM instance information query request object. Each API corresponds to a request object
             DescribeInstancesRequest req = new DescribeInstancesRequest();
             // Populate the request parameters. Here, the member variables of the request object are the input parameters of the corresponding API
             // You can view the definition of the request parameters in the API documentation at the official website or by redirecting to the definition of the request object
             Filter respFilter = new Filter(); // Create a `Filter` object to query CVM instances in the `zone` dimension
             respFilter.setName("zone");
             respFilter.setValues(new String[] { "ap-shanghai-1", "ap-shanghai-2" });
             req.setFilters(new Filter[] { respFilter }); // `Filters` is a list of `Filter` objects
             // Initialize the request by calling the `DescribeInstances` method on the client object. Note: the request method name corresponds to the request object
             // The returned `resp` is an instance of the `DescribeInstancesResponse` class which corresponds to the request object
             DescribeInstancesResponse resp = client.DescribeInstances(req);
             // A string return packet in JSON format is output
             System.out.println(DescribeInstancesResponse.toJsonString(resp));
             // You can also take a single value
             // You can view the definition of the return field in the API documentation at the official website or by redirecting to the definition of the response object
             System.out.println(resp.getTotalCount());
         } catch (TencentCloudSDKException e) {
              System.out.println(e.toString());
         }
     }
}