AESUtil

package com.sf.test.encryption;

import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.Base64;
import java.util.Scanner;

public class AESUtil {

    public static String AESEncode(String encodeRules, String content) {
        try {
            KeyGenerator keyGen = KeyGenerator.getInstance("AES");
            keyGen.init(128, new SecureRandom(encodeRules.getBytes()));
            SecretKey original_key = keyGen.generateKey();
            byte[] raw = original_key.getEncoded();
            SecretKey key = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] byte_encode = content.getBytes(StandardCharsets.UTF_8);
            byte[] byte_AES = cipher.doFinal(byte_encode);
            String AES_encode = new String(Base64.getEncoder().encode(byte_AES));
            return AES_encode;
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static String AESDecode(String encodeRules, String content) {
        try {
            KeyGenerator keyGen = KeyGenerator.getInstance("AES");
            keyGen.init(128, new SecureRandom(encodeRules.getBytes()));
            SecretKey original_key = keyGen.generateKey();
            byte[] raw = original_key.getEncoded();
            SecretKey key = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, key);
            byte[] byte_content = Base64.getDecoder().decode(content);
            byte[] byte_decode = cipher.doFinal(byte_content);
            String AES_decode = new String(byte_decode, StandardCharsets.UTF_8);
            return AES_decode;
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void test1() {
        Scanner scanner = new Scanner(System.in);
        System.out.println("encodeRules: ");
        String encodeRules = scanner.next();
        System.out.println("content to be encoded: ");
        String content = scanner.next();
        String encodedString = AESEncode(encodeRules, content);
        System.out.println("encodedString: " + encodedString);
        System.out.println("decodedString: " + AESDecode(encodeRules, encodedString));
    }

    public static void main(String[] args) {
        test1();
    }

}

encodeRules: 
AllowMeToTakeCareOfYou
content to be encoded: 
IWantToTakeCareOfYou
encodedString: ySFEfux/g+po5L//U4lOrLccosTHFNa8tNYVOKGNEjE=
decodedString: IWantToTakeCareOfYou