Obtain an STS token

import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.exceptions.ClientException;
import com.aliyuncs.http.MethodType;
import com.aliyuncs.profile.DefaultProfile;
import com.aliyuncs.profile.IClientProfile;
import com.aliyuncs.sts.model.v20150401.AssumeRoleRequest;
import com.aliyuncs.sts.model.v20150401.AssumeRoleResponse;


/**
 * @author jack
 * @date 2020/5/25
 */
public class TestStsService {

    public static void main(String[] args) {
        // Only RAM users can call the AssumeRole operation.
        // AccessKey pairs of Alibaba Cloud accounts cannot be used to initiate AssumeRole requests.
        // Create a RAM user in the Resource Access Management (RAM) console and create an AccessKey pair for the RAM user.
        String accessKeyId = "LTAI5tKtf6vKccbinQu****";
        String accessKeySecret = "D47l1yBPgjdqe3JzVASSF9yrje****";
        // Request parameters for the AssumeRole operation include RoleArn, RoleSessionName, Policy, and DurationSeconds.
        // RoleArn: You can obtain the value of this parameter in the RAM console.
        String roleArn = "acs:ram::1748098430911242:role/vodrole";
        // RoleSessionName: the session name of the role. You can set this parameter based on your needs.
        String roleSessionName = "session-name";// Specify a session name.
        // Specify a policy.
        String policy = "{\n" +
                "  \"Version\": \"1\",\n" +
                "  \"Statement\": [\n" +
                "    {\n" +
                "      \"Action\": \"vod:*\",\n" +
                "      \"Resource\": \"*\",\n" +
                "      \"Effect\": \"Allow\"\n" +
                "    }\n" +
                "  ]\n" +
                "}";
        try {
            AssumeRoleResponse response = assumeRole(accessKeyId, accessKeySecret, roleArn, roleSessionName, policy);
            System.out.println("Expiration: " + response.getCredentials().getExpiration());
            System.out.println("Access Key Id: " + response.getCredentials().getAccessKeyId());
            System.out.println("Access Key Secret: " + response.getCredentials().getAccessKeySecret());
            System.out.println("Security Token: " + response.getCredentials().getSecurityToken());
            System.out.println("RequestId: " + response.getRequestId());

            createUploadVideo(response.getCredentials().getAccessKeyId(), response.getCredentials().getAccessKeySecret(), response.getCredentials().getSecurityToken());
        } catch (ClientException e) {
            System.out.println("Failed to get a token.");
            System.out.println("Error code: " + e.getErrCode());
            System.out.println("Error message: " + e.getErrMsg());
        }
    }

    static AssumeRoleResponse assumeRole(String accessKeyId, String accessKeySecret, String roleArn, String roleSessionName, String policy) throws ClientException {
        try {
            // Construct a default profile. Leave the parameters empty. The regionId parameter is not required.
            /*
            Note: If you set SysEndpoint to sts.aliyuncs.com, the regionId parameter is optional. Otherwise, you must set the regionId parameter to the region in which you use STS. Example: cn-shanghai.
            For more information about the STS endpoints in different regions, see Endpoints. 
             */
            IClientProfile profile = DefaultProfile.getProfile("", accessKeyId, accessKeySecret);
            // Use the profile to construct a client.
            DefaultAcsClient client = new DefaultAcsClient(profile);
            // Create an AssumeRole request and set the request parameters.
            final AssumeRoleRequest request = new AssumeRoleRequest();
            request.setSysEndpoint("sts.aliyuncs.com");
            request.setSysMethod(MethodType.POST);
            request.setRoleArn(roleArn);
            request.setRoleSessionName(roleSessionName);
            request.setPolicy(policy);
            // Initiate the request and obtain the response.
            final AssumeRoleResponse response = client.getAcsResponse(request);
            return response;
        } catch (ClientException e) {
            throw e;
        }
    }