1.依赖

     <dependency>
            <groupId>org.bouncycastle</groupId>
            <artifactId>bcprov-jdk15on</artifactId>
            <version>1.60</version>
        </dependency>

2.工具类

package com.zykj.zycx.utils;


/*import org.apache.commons.net.util.Base64;*/
import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/**
 * @author lc
 * @version 1.0
 * @date 2022/3/21 10:57
 */
public class AESUtil {
    static Logger logger = LoggerFactory.getLogger(AESUtil.class);
    // 密钥
    public static String key = "AD42F6697B035B7580E4FEF93BE20BAD"; // 32位
    private static String charset = "utf-8";
    // 偏移量
    private static int offset = 16;
    // 加密器类型:加密算法为AES,加密模式为CBC,补码方式为PKCS5Padding
    private static String transformation = "AES/CBC/PKCS5Padding";
    // 算法类型：用于指定生成AES的密钥
    private static String algorithm = "AES";



    /**
     * 加密
     *
     * @param content
     * @return
     */
    public static String encrypt(String content) {
        return encrypt(content, key);
    }

    /**
     * 解密
     *
     * @param content
     * @return
     */
    public static String decrypt(String content) {
        return decrypt(content, key);
    }

    /**
     * 加密
     *
     * @param content 需要加密的内容
     * @param key     加密密码(也可以自己直接用这个)
     * @return
     */
    public static String encrypt(String content, String key) {
        try {
            //构造密钥
            SecretKeySpec skey = new SecretKeySpec(key.getBytes(), algorithm);
            //创建初始向量iv用于指定密钥偏移量(可自行指定但必须为128位)，因为AES是分组加密，下一组的iv就用上一组加密的密文来充当
            IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, offset);
            //创建AES加密器
            Cipher cipher = Cipher.getInstance(transformation);
            byte[] byteContent = content.getBytes(charset);
            //使用加密器的加密模式
            cipher.init(Cipher.ENCRYPT_MODE, skey, iv);
            // 加密
            byte[] result = cipher.doFinal(byteContent);
            //使用BASE64对加密后的二进制数组进行编码
            return new Base64().encodeToString(result);
        } catch (Exception e) {
            logger.info("", e);
        }
        return null;
    }

    /**
     * AES（256）解密
     *
     * @param content 待解密内容
     * @param key     解密密钥
     * @return 解密之后
     * @throws Exception
     */
    public static String decrypt(String content, String key) {
        try {

            SecretKeySpec skey = new SecretKeySpec(key.getBytes(), algorithm);
            IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, offset);
            Cipher cipher = Cipher.getInstance(transformation);
            //解密时使用加密器的解密模式
            cipher.init(Cipher.DECRYPT_MODE, skey, iv);// 初始化
            byte[] result = cipher.doFinal(new Base64().decode(content));
            return new String(result); // 解密
        } catch (Exception e) {
            logger.info("解密异常：", e);
        }
        return null;
    }

    // 通过秘钥判断code是否正确
    public static boolean checkCode(String code, String key) {
        String decrypt = decrypt(code, key);
        if (decrypt != null) {
            return true;
        }
        return false;
    }

    // 随机生成32位字符串
    public static String generate32Str() {
        return RandomUtils.getItemID(32);
    }

    public static void main(String[] args) {
        String s = "BUSINESS_CARD";
        String key = generate32Str();
        System.out.println(key);
        String encryptResultStr = encrypt(s,key);
        // 加密
        System.out.println("加密前：" + s);
        System.out.println("加密后：" + encryptResultStr);
        // 解密
        System.out.println("解密后：" + decrypt(encryptResultStr, key));

        System.out.println("符合：" + checkCode(encryptResultStr, key));

    }


}

3.枚举

package com.zykj.zycx.common.enums;

import com.zykj.zycx.utils.AESUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.security.Key;
import java.security.PrivateKey;
import java.util.Base64;

/**
 * 商户key枚举
 *
 * @author lc
 * @version 1.0
 * @date 2022/3/21 10:41
 */
public enum  BusinessEnum {
    BUSINESS_CARD(3, "12s6z02yo6X1OjB458mb2E89d9bqDF1j", "adxyNQCC+Tf4HgQM1a6klw==");


    private Integer businessId;
    private String businessKey; // 加密的盐
    private String businessCode; // 加密后的code

    // 私有构造
    BusinessEnum(int businessId, String businessKey, String businessCode) {
        this.businessId = businessId;
        this.businessKey = businessKey;
        this.businessCode = businessCode;
    }



    // 通过key来校验code
    public static boolean checkCode(BusinessEnum businessEnum) {
        boolean check = AESUtil.checkCode(businessEnum.businessCode, businessEnum.businessKey);
        return check;
    }

    public static boolean checkCode(String businessCode, String businessKey) {
        boolean check = AESUtil.checkCode(businessCode, businessKey);
        return check;
    }

}