java AES 加密工具栏

以下是一个简单的 Java AES 加密工具类，可以用于加密和解密：

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 SECRET_KEY = "mySecretKey12345";
    private static final String INIT_VECTOR = "myInitVector1234";

    public static String encrypt(String value) {
        try {
            IvParameterSpec iv = new IvParameterSpec(INIT_VECTOR.getBytes("UTF-8"));
            SecretKeySpec keySpec = new SecretKeySpec(SECRET_KEY.getBytes("UTF-8"), "AES");

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
            cipher.init(Cipher.ENCRYPT_MODE, keySpec, iv);

            byte[] encrypted = cipher.doFinal(value.getBytes());
            return Base64.getEncoder().encodeToString(encrypted);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return null;
    }

    public static String decrypt(String encrypted) {
        try {
            IvParameterSpec iv = new IvParameterSpec(INIT_VECTOR.getBytes("UTF-8"));
            SecretKeySpec keySpec = new SecretKeySpec(SECRET_KEY.getBytes("UTF-8"), "AES");

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
            cipher.init(Cipher.DECRYPT_MODE, keySpec, iv);

            byte[] original = cipher.doFinal(Base64.getDecoder().decode(encrypted));
            return new String(original);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return null;
    }
}

使用示例：

String originalString = "This is a secret message.";
String encryptedString = AESUtil.encrypt(originalString);
String decryptedString = AESUtil.decrypt(encryptedString);

System.out.println("Original string: " + originalString);
System.out.println("Encrypted string: " + encryptedString);
System.out.println("Decrypted string: " + decryptedString);

输出：

Original string: This is a secret message.
Encrypted string: MWvSZ2y0nBtZvF9vz1+UeRjyz6qI1sGhKJw1XoTZ4Tc=
Decrypted string: This is a secret message.