前端AES加密，后端AES解密

1.引入crypto-js

import AES from 'crypto-js';

2.前端加密函数（附加一个解密函数）

//十六位十六进制数作为密钥
const key = AES.enc.Utf8.parse('0123456789ASDFGH');
//十六位十六进制数作为密钥偏移量
const iv = AES.enc.Utf8.parse('ASDFGH0123456789'); 

export const encrypt = word => {
    const src = AES.enc.Utf8.parse(word);
    const encrypted = AES.AES.encrypt(
        src,
        key,
        {
            iv: iv,
            mode: AES.mode.CBC,
            padding: AES.pad.Pkcs7
        });
    return encrypted.ciphertext.toString().toUpperCase();
};

export const decrypt = word => {
    const encryptedHexStr = AES.enc.Hex.parse(word);
    const src = AES.enc.Base64.stringify(encryptedHexStr);
    const decrypt = AES.AES.decrypt(
        src,
        key,
        {
            iv: iv,
            mode: AES.mode.CBC,
            padding: AES.pad.Pkcs7
        });
    const decryptedStr = decrypt.toString(AES.enc.Utf8);
    return decryptedStr.toString();
};

3.后端解密函数（附加一个加密函数）

import com.alibaba.fastjson.JSONObject;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.util.Objects;

public class AESHelper {
	 // key：必须16个字符，且要和前端保持一致
    private final static String KEY = "0123456789ASDFGH";
    // 偏移量：必须16个字符，且要和前端保持一致
    private final static String IV = "ASDFGH0123456789";

    /**
     * 加密返回的数据转换成 String 类型
     * @param content 明文
     */
    public static String encrypt(String content) {
        return parseByte2HexStr(Objects.requireNonNull(aesCbcEncrypt(content.getBytes(), KEY.getBytes(), IV.getBytes())));
    }

    /**
     * 将解密返回的数据转换成 String 类型
     * @param content Base64编码的密文
     */
    public static String decrypt(String content) {
        return new String(Objects.requireNonNull(aesCbcDecrypt(parseHexStr2Byte(content), KEY.getBytes(), IV.getBytes())));
    }

    private static byte[] aesCbcEncrypt(byte[] content, byte[] keyBytes, byte[] iv) {
        try {
            SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
            //设置模式，编码，后端为PKCS5Padding，对应前端是Pkcs7
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(iv));
            return cipher.doFinal(content);
        } catch (Exception e) {
            System.out.println("exception:" + e.toString());
        }
        return null;
    }

    private static byte[] aesCbcDecrypt(byte[] content, byte[] keyBytes, byte[] iv) {
        try {
            SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
            return cipher.doFinal(content);
        } catch (Exception e) {
            System.out.println("exception:" + e.toString());
        }
        return null;
    }

    /**
     * 将byte数组转换成16进制String
     */
    public static String parseByte2HexStr(byte[] buf) {
        StringBuilder sb = new StringBuilder();
        for (byte b : buf) {
            String hex = Integer.toHexString(b & 0xFF);
            if (hex.length() == 1) {
                hex = '0' + hex;
            }
            sb.append(hex.toUpperCase());
        }
        return sb.toString();
    }

    /**
     * 将16进制String转换为byte数组
     */
    public static byte[] parseHexStr2Byte(String hexStr) {
        if (hexStr.length() < 1) {
            return null;
        }
        byte[] result = new byte[hexStr.length() / 2];
        for (int i = 0; i < hexStr.length() / 2; i++) {
            int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
            int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);
            result[i] = (byte) (high * 16 + low);
        }
        return result;
    }
}