aes加密算法java完整代码

AES（Advanced Encryption Standard）是一种高级加密标准，用于数据的块级加密。在Java中，我们可以使用`javax.crypto.Cipher`类来实现AES加密。以下是一个简单的Java代码示例，展示了如何使用AES进行加密和解密：

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.security.Key;
import java.util.Base64;

public class AESExample {

    private static final String ALGORITHM = "AES";
    private static final String KEY = "your_secret_key"; // 用实际的密钥替换此字符串

    // 加密方法
    public static String encrypt(String data) throws Exception {
        Key key = generateAESKey();
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] encryptedData = cipher.doFinal(data.getBytes());
        return Base64.getEncoder().encodeToString(encryptedData);
    }

    // 解密方法
    public static String decrypt(String encryptedData) throws Exception {
        Key key = generateAESKey();
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, key);
        byte[] decryptedData = cipher.doFinal(Base64.getDecoder().decode(encryptedData));
        return new String(decryptedData);
    }

    // 生成AES密钥
    private static Key generateAESKey() throws Exception {
        return new SecretKeySpec(KEY.getBytes(), ALGORITHM);
    }

    public static void main(String[] args) {
        try {
            String originalText = "Hello, World!";
            String encrypted = encrypt(originalText);
            String decrypted = decrypt(encrypted);
            System.out.println("Original: " + originalText);
            System.out.println("Encrypted: " + encrypted);
            System.out.println("Decrypted: " + decrypted);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

请注意，这只是一个基本示例，实际应用中你需要妥善管理密钥的安全存储和传递，以及处理可能出现的各种异常。