请求中的imei与mac字段均需通过AES算法进行加密，并且将加密后的二进制数据通过base64编码为字符串。为了方便配置，示例中的密钥是经过base64处理后的字符串(base64Key)。base64Key在接入时由OPPO提供。 Base64Key: XGAXicVG5GMBsx5bueOe4w==

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

public class EncryptionExample {
    public static void main(String[] args) throws Exception {
        String imei = "1234567890";
        String mac = "00:11:22:33:44:55";
        String base64Key = "XGAXicVG5GMBsx5bueOe4w==";

        // 使用Base64解码密钥
        byte[] keyBytes = Base64.getDecoder().decode(base64Key);
        SecretKeySpec secretKeySpec = new SecretKeySpec(keyBytes, "AES");

        // 创建AES加密器
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);

        // 加密IMEI字段
        byte[] encryptedImeiBytes = cipher.doFinal(imei.getBytes());
        String encryptedImeiBase64 = Base64.getEncoder().encodeToString(encryptedImeiBytes);

        // 加密MAC字段
        byte[] encryptedMacBytes = cipher.doFinal(mac.getBytes());
        String encryptedMacBase64 = Base64.getEncoder().encodeToString(encryptedMacBytes);

        System.out.println("Encrypted IMEI: " + encryptedImeiBase64);
        System.out.println("Encrypted MAC: " + encryptedMacBase64);
    }
}