怎么使用aes-256-cbc 加密，可以给我一份java代码吗

当然可以，以下是Java中使用AES-256-CBC加密的示例代码： ```java import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.nio.charset.StandardCharsets; import java.util.Base64; public class AESUtil { public static [string](https://geek.csdn.net/edu/8802d631b97a4a6af1f4d0bbf8527465?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083) encrypt([string](https://geek.csdn.net/edu/8802d631b97a4a6af1f4d0bbf8527465?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083) key, [string](https://geek.csdn.net/edu/8802d631b97a4a6af1f4d0bbf8527465?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083) iv, [string](https://geek.csdn.net/edu/8802d631b97a4a6af1f4d0bbf8527465?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083) data) throws Exception { Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); SecretKeySpec secret = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES"); IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes(StandardCharsets.UTF_8)); cipher.init(Cipher.ENCRYPT_MODE, secret, ivParameterSpec); byte[] encrypted = cipher.doFinal(data.getBytes()); return Base64.getEncoder().encodeTo[string](https://geek.csdn.net/edu/8802d631b97a4a6af1f4d0bbf8527465?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083)(encrypted); public static String decrypt(String key, String iv, String encrypted) throws Exception { Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); SecretKeySpec secret = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES"); IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes(StandardCharsets.UTF_8)); cipher.init(Cipher.DECRYPT_MODE, secret, ivParameterSpec); byte[] original = cipher.doFinal(Base64.getDecoder().decode(encrypted)); return new String(original, StandardCharsets.UTF_8); ```