用iv & PKCS7Padding加密串解密AES256CBC(用Java加密)

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

public class AESUtil {
    private static final String ALGORITHM = "AES/CBC/PKCS5Padding";
    private static final String CHARSET = "UTF-8";

    public static String encrypt(String data, String key, String iv) throws Exception {
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(CHARSET), "AES");
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes(CHARSET));
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec);
        byte[] encrypted = cipher.doFinal(data.getBytes(CHARSET));
        return Base64.getEncoder().encodeToString(encrypted);
    }

    public static String decrypt(String encryptedData, String key, String iv) throws Exception {
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(CHARSET), "AES");
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes(CHARSET));
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivParameterSpec);
        byte[] decrypted = cipher.doFinal(Base64.getDecoder().decode(encryptedData));
        return new String(decrypted, CHARSET);
    }

    public static void main(String[] args) throws Exception {
        String data = "Hello, World!";
        String key = "0123456789abcdef0123456789abcdef";
        String iv = "0123456789abcdef";
        String encryptedData = encrypt(data, key, iv);
        String decryptedData = decrypt(encryptedData, key, iv);
        System.out.println("Encrypted Data: " + encryptedData);
        System.out.println("Decrypted Data: " + decryptedData);
    }
}