一、前端JS加密与解密

import CryptoJS from 'crypto-js'

//秘钥，必须由16位字符组成
let secretKey = "aaaabbbbccccdddd"
export const AESUtil = {
  /**
   * AES加密方法
   * @param content 要加密的字符串
   * @returns {string} 加密结果
   */
  aesEncrypt: (content) => {
    let key = CryptoJS.enc.Utf8.parse(secretKey);
    let srcs = CryptoJS.enc.Utf8.parse(content);
    let encrypted = CryptoJS.AES.encrypt(srcs, key, { mode:CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 });
    return encrypted.toString();
  },

  /**
   * 解密方法
   * @param encryptStr 密文
   * @returns {string} 明文
   */
  aesDecrypt: (encryptStr) => {
    let key = CryptoJS.enc.Utf8.parse(secretKey);
    let decrypt = CryptoJS.AES.decrypt(encryptStr, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
    return CryptoJS.enc.Utf8.stringify(decrypt).toString();
  }
}

二、Java端加密与解密

EncryptUtil.java

import org.springframework.util.StringUtils;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

public class EncryptUtil {
  /**
     * AES解密
     * @param encryptStr 密文
     * @param decryptKey 秘钥，必须为16个字符组成
     * @return 明文
     * @throws Exception
     */
    public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
        if (StringUtils.isEmpty(encryptStr) || StringUtils.isEmpty(decryptKey)) {
            return null;
        }

        byte[] encryptByte = Base64.getDecoder().decode(encryptStr);
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
        byte[] decryptBytes = cipher.doFinal(encryptByte);
        return new String(decryptBytes);
    }

    /**
     * AES加密
     * @param content 明文
     * @param encryptKey 秘钥，必须为16个字符组成
     * @return 密文
     * @throws Exception
     */
    public static String aesEncrypt(String content, String encryptKey) throws Exception {
        if (StringUtils.isEmpty(content) || StringUtils.isEmpty(encryptKey)) {
            return null;
        }

        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));

        byte[] encryptStr = cipher.doFinal(content.getBytes(StandardCharsets.UTF_8));
        return Base64.getEncoder().encodeToString(encryptStr);
     }

     // 测试加密与解密
     public static void main(String[] args) {
        try {
            String secretKey = "aaaabbbbccccdddd";
            String content = "hello world";
            String s1 = aesEncrypt(content, secretKey);
            System.out.println(s1);
            String s = aesDecrypt(s1, secretKey);
            System.out.println(s);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

**注意：**前端JS加密secretKey与后端secretKey需保持一致，并且注意secretKey字符数量必须为16位

出处：https://www.jianshu.com/p/604960c569d2