Java和PHP都是應用廣泛的編程語言，而AES是一種高級加密標準，用于加密和解密數字數據流。下面將介紹Java和PHP如何使用AES來實現數據加密和解密。

Java實現AES加密和解密

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
public class AESUtil {
private static final String ALGORITHM = "AES/ECB/PKCS5Padding";
public static byte[] encrypt(String key, String str) throws Exception {
SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
return cipher.doFinal(str.getBytes());
}
public static String decrypt(String key, byte[] bytes) throws Exception {
SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
return new String(cipher.doFinal(bytes));
}
public static void main(String[] args) throws Exception {
String key = "key1234567890";
String str = "Hello, world!";
byte[] encrypted = encrypt(key, str);
System.out.println("Encrypted data: " + new String(encrypted));
String decrypted = decrypt(key, encrypted);
System.out.println("Decrypted data: " + decrypted);
}
}

PHP實現AES加密和解密

function aes_encrypt($key, $str) {
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $str, MCRYPT_MODE_ECB, $iv);
return base64_encode($encrypted);
}
function aes_decrypt($key, $str) {
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, base64_decode($str), MCRYPT_MODE_ECB, $iv);
return rtrim($decrypted, "\0");
}
$key = "key1234567890";
$str = "Hello, world!";
$encrypted = aes_encrypt($key, $str);
echo "Encrypted data: $encrypted\n";
$decrypted = aes_decrypt($key, $encrypted);
echo "Decrypted data: $decrypted\n";