:CreateAccount

import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
public class Base64Utils {
    public static final Charset UTF8 = StandardCharsets.UTF_8;
    /**
    * Decode the Base64 string.
    * @param str
    * @return
    */
    public static String decode(String str) {
        return new String(Base64.getDecoder().decode(str.getBytes(UTF8)), UTF8);
    }
    public static String encode(String bytes) {
        return new String(Base64.getEncoder().encode(bytes.getBytes(UTF8)), UTF8);
    }
    public static void main(String[] args) {
        // Use the ID of your ApsaraMQ for RabbitMQ instance and the AccessKey pair of the Alibaba Cloud account that you use to purchase the instance to form a string.
        String str = "2:${instanceId}:${ak}";
        // Generate the value of the userName parameter in the API operation.
        String userName = encode(str);
        System.out.println("userName=" + userName);
        String decodeStr = decode(userName);
        System.out.println("originStr=" + decodeStr);
    }
}

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
public class SignatureUtils {
    public static String hamcsha1(byte[] data, byte[] key) throws NoSuchAlgorithmException, InvalidKeyException {
        SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
        Mac mac = Mac.getInstance("HmacSHA1");
        mac.init(signingKey);
        return byte2hex(mac.doFinal(data));
    }
    public static String byte2hex(byte[] b) {
        StringBuilder hs = new StringBuilder();
        String stmp;
        for (int n = 0; b != null && n < b.length; n++) {
            stmp = Integer.toHexString(b[n] & 0XFF);
            if (stmp.length() == 1) {
                hs.append('0');
            }
            hs.append(stmp);
        }
        return hs.toString().toUpperCase();
    }
    public static void main(String[] args) throws InvalidKeyException, NoSuchAlgorithmException {
        // The value of the createTimestamp parameter in the sample code is the value of the createTimestamp parameter in the API operation. 
        String createTimestamp= String.valueOf(System.currentTimeMillis());
        System.out.println("createTimestamp:" + createTimestamp);
        // The AccessKey secret of your Alibaba Cloud account. 
        String sk = "${sk}";
        // Generate the value of the SecretSign parameter in the API operation. 
        String SecretSign = hamcsha1(sk.getBytes(), createTimestamp.getBytes());
        System.out.println("SecretSign:" + SecretSign);
        // Generate the value of the signature parameter in the operation. 
        String signature = hamcsha1(createTimestamp.getBytes(), sk.getBytes());
        System.out.println("signature:" + signature);
    }
}

http(s)://[Endpoint]/?Action=CreateAccount
&instanceId=amqp-cn-*********
&accountAccessKey=LTAI5t8be*******tEJ6vfo
&userName=LTAI5***********eRZtEJ6vfo
&signature=22c2d7d1769cb53c5a6d9213248e2de524******
&createTimestamp=1671175303522
&secretSign=4c1a6367ce4c4255e9617326f9133ac635******
&<Common request parameters>

HTTP/1.1 200 OK
Content-Type:application/xml

<CreateAccountResponse>
    <RequestId>FEBA5E0C-50D0-4FA6-A794-4901E5465***</RequestId>
    <Code>200</Code>
    <Message>operation success</Message>
    <Success>true</Success>
    <Data>
        <AccessKey>LTAI5***********eRZtEJ6vfo</AccessKey>
        <Password>OUYwQzM2QjZBRkUxNDRFM***************MzZCNzdDQzoxNjcxNDMwMzkyODI1</Password>
        <CreateTimeStamp>1671175303522</CreateTimeStamp>
        <InstanceId>amqp-cn-*********</InstanceId>
        <UserName>MjphbXFwLWNuLXVxbTJ6cjc2djAwMzpMVEFJNX*******ZNMWVSWnRFSjZ2Zm8=</UserName>
    </Data>
</CreateAccountResponse>

HTTP/1.1 200 OK
Content-Type:application/json

{
  "RequestId" : "FEBA5E0C-50D0-4FA6-A794-4901E5465***",
  "Code" : 200,
  "Message" : "operation success",
  "Success" : true,
  "Data" : {
    "AccessKey" : "LTAI5***********eRZtEJ6vfo",
    "Password" : "OUYwQzM2QjZBRkUxNDRFM***************MzZCNzdDQzoxNjcxNDMwMzkyODI1",
    "CreateTimeStamp" : 1671175303522,
    "InstanceId" : "amqp-cn-*********",
    "UserName" : "MjphbXFwLWNuLXVxbTJ6cjc2djAwMzpMVEFJNX*******ZNMWVSWnRFSjZ2Zm8="
  }
}