快速简单的字符串在JAVA中加密/解密

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

public class AESUtil {

    private static final String ALGORITHM = "AES";
    private static final String TRANSFORMATION = "AES";

    public static String encrypt(String key, String data) throws Exception {
        SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), ALGORITHM);
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
        byte[] encryptedBytes = cipher.doFinal(data.getBytes());
        return Base64.getEncoder().encodeToString(encryptedBytes);
    }

    public static String decrypt(String key, String encryptedData) throws Exception {
        SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), ALGORITHM);
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
        byte[] decodedBytes = Base64.getDecoder().decode(encryptedData);
        byte[] decryptedBytes = cipher.doFinal(decodedBytes);
        return new String(decryptedBytes);
    }
}

public static void main(String[] args) {
    String key = "1234567812345678"; // 密钥长度必须为16、24或32字节
    String data = "Hello, world!";

    try {
        String encryptedData = AESUtil.encrypt(key, data);
        System.out.println("Encrypted data: " + encryptedData);

        String decryptedData = AESUtil.decrypt(key, encryptedData);
        System.out.println("Decrypted data: " + decryptedData);
    } catch (Exception e) {
        e.printStackTrace();
    }
}