PHP代码:

<?php
class Security {
   public static function encrypt($input, $key) {
   $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
   $input = Security::pkcs5_pad($input, $size);
   $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
   $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
   mcrypt_generic_init($td, $key, $iv);
   $data = mcrypt_generic($td, $input);
   mcrypt_generic_deinit($td);
   mcrypt_module_close($td);
   $data = base64_encode($data);
   return $data;
   }

   private static function pkcs5_pad ($text, $blocksize) {
       $pad = $blocksize - (strlen($text) % $blocksize);
       return $text . str_repeat(chr($pad), $pad);
   }

   public static function decrypt($sStr, $sKey) {
       $decrypted= mcrypt_decrypt(
       MCRYPT_RIJNDAEL_128,
       $sKey,
       base64_decode($sStr),
       MCRYPT_MODE_ECB
   );

       $dec_s = strlen($decrypted);
       $padding = ord($decrypted[$dec_s-1]);
       $decrypted = substr($decrypted, 0, -$padding);
       return $decrypted;
   }   
}



$key = "1234567891234567";
$data = "example";

$value = Security::encrypt($data , $key );
echo $value.'<br/>';
echo Security::decrypt($value, $key );

java 代码

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

public class Security {
   public static String encrypt(String input, String key){
   byte[] crypted = null;
   try{
   SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
   Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
   cipher.init(Cipher.ENCRYPT_MODE, skey);
   crypted = cipher.doFinal(input.getBytes());
   }catch(Exception e){
   System.out.println(e.toString());
   }
   return new String(Base64.encodeBase64(crypted));
}

public static String decrypt(String input, String key){
   byte[] output = null;
   try{
   SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
   Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
   cipher.init(Cipher.DECRYPT_MODE, skey);
   output = cipher.doFinal(Base64.decodeBase64(input));
   }catch(Exception e){
   System.out.println(e.toString());
   }
   return new String(output);
}

   public static void main(String[] args) {
       String key = "1234567891234567";
       String data = "example";
       
       System.out.println(Security.encrypt(data, key));
       
       System.out.println(Security.decrypt(Security.encrypt(data, key), key));
       
           
   }   
}

原文链接：http://jickcai.iteye.com/blog/1742481