<?phpclass DES{    var $key;    var $iv; //偏移量      function DES($key, $iv=0)    {        $this->key = $key;        if($iv == 0)        {            $this->iv = $key;        }        else        {            $this->iv = $iv;        }    }      //加密    function encrypt($str)    {               $size = mcrypt_get_block_size ( MCRYPT_DES, MCRYPT_MODE_CBC );        $str = $this->pkcs5Pad ( $str, $size );          $data=http://www.mamicode.com/mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_ENCRYPT, $this->iv);"";        for($i = 0; $i < strlen ( $hexData ); $i += 2)        {            $binData .= chr(hexdec(substr($hexData, $i, 2)));        }        return $binData;    }      function pkcs5Pad($text, $blocksize)    {        $pad = $blocksize - (strlen ( $text ) % $blocksize);        return $text . str_repeat ( chr ( $pad ), $pad );    }      function pkcs5Unpad($text)    {        $pad = ord ( $text {strlen ( $text ) - 1} );        if ($pad > strlen ( $text ))            return false;        if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad)            return false;        return substr ( $text, 0, - 1 * $pad );    }}$str = ‘abcd‘;$key= ‘asdfwef5‘;$crypt = new DES($key);$mstr = $crypt->encrypt($str);$str = $crypt->decrypt($mstr);  echo $str.‘ <=> ‘.$mstr;  ?>

package com.test;  import it.sauronsoftware.base64.Base64;  import java.security.Key;import java.security.SecureRandom;import java.security.spec.AlgorithmParameterSpec;  import javax.crypto.Cipher;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import javax.crypto.spec.IvParameterSpec;  public class Main{  public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding";  /**   * DES算法，加密   *   * @param data 待加密字符串   * @param key 加密私钥，长度不能够小于8位   * @return 加密后的字节数组，一般结合Base64编码使用   * @throws CryptException 异常   */  public static String encode(String key,String data) throws Exception  {    return encode(key, data.getBytes());  }  /**   * DES算法，加密   *   * @param data 待加密字符串   * @param key 加密私钥，长度不能够小于8位   * @return 加密后的字节数组，一般结合Base64编码使用   * @throws CryptException 异常   */  public static String encode(String key,byte[] data) throws Exception  {    try    {        DESKeySpec dks = new DESKeySpec(key.getBytes());          SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");      //key的长度不能够小于8位字节      Key secretKey = keyFactory.generateSecret(dks);      Cipher cipher = Cipher.getInstance(ALGORITHM_DES);      IvParameterSpec iv = new IvParameterSpec(key.getBytes());      AlgorithmParameterSpec paramSpec = iv;      cipher.init(Cipher.ENCRYPT_MODE, secretKey,paramSpec);        byte[] bytes = cipher.doFinal(data);    //      return byte2hex(bytes);      return new String(Base64.encode(bytes));    } catch (Exception e)    {      throw new Exception(e);    }  }    /**   * DES算法，解密   *   * @param data 待解密字符串   * @param key 解密私钥，长度不能够小于8位   * @return 解密后的字节数组   * @throws Exception 异常   */  public static byte[] decode(String key,byte[] data) throws Exception  {    try    {        SecureRandom sr = new SecureRandom();        DESKeySpec dks = new DESKeySpec(key.getBytes());        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");      //key的长度不能够小于8位字节      Key secretKey = keyFactory.generateSecret(dks);      Cipher cipher = Cipher.getInstance(ALGORITHM_DES);      IvParameterSpec iv = new IvParameterSpec(key.getBytes());      AlgorithmParameterSpec paramSpec = iv;      cipher.init(Cipher.DECRYPT_MODE, secretKey,paramSpec);      return cipher.doFinal(data);    } catch (Exception e)    {      throw new Exception(e);    }  }    /**   * 获取编码后的值   * @param key   * @param data   * @return   * @throws Exception   */  public static String decodeValue(String key,String data)   {    byte[] datas;    String value = http://www.mamicode.com/null;"";        }    return value;  }    public static void main(String[] args) throws Exception  {    System.out.println("明：abcd ；密：" + Main.encode("asdfwef5","abcd"));  }}