java数据库加密

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

public class DataEncryptionExample {

    public static void main(String[] args) throws Exception {
        String originalData = "Sensitive information";

        // Generate a secret key
        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
        keyGen.init(256);
        SecretKey secretKey = keyGen.generateKey();

        // Encrypt the data
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] encryptedData = cipher.doFinal(originalData.getBytes());
        String encryptedDataBase64 = Base64.getEncoder().encodeToString(encryptedData);
        System.out.println("Encrypted Data: " + encryptedDataBase64);

        // Decrypt the data
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte[] decryptedData = cipher.doFinal(Base64.getDecoder().decode(encryptedDataBase64));
        String decryptedDataString = new String(decryptedData);
        System.out.println("Decrypted Data: " + decryptedDataString);
    }
}