java实现的AES加密算法完整实例
本文实例讲述了java实现的AES加密算法。分享给大家供大家参考，具体如下：
importjavax.crypto.Cipher;
importjavax.crypto.spec.IvParameterSpec;
importjavax.crypto.spec.SecretKeySpec;
importandroid.util.Base64;
/**
*@authorvipin.cb,vipin.cb@experionglobal.com<br>
*Sep27,2013,5:18:34PM<br>
*Package:-<b>com.veebow.util</b><br>
*Project:-<b>Veebow</b>
*<p>
*/
publicclassAESCrypt{
privatefinalCiphercipher;
privatefinalSecretKeySpeckey;
privateAlgorithmParameterSpecspec;
publicstaticfinalStringSEED_16_CHARACTER="U1MjU1M0FDOUZ.Qz";
publicAESCrypt()throwsException{
//hashpasswordwithSHA-256andcroptheoutputto128-bitforkey
MessageDigestdigest=MessageDigest.getInstance("SHA-256");
digest.update(SEED_16_CHARACTER.getBytes("UTF-8"));
byte[]keyBytes=newbyte[32];
System.arraycopy(digest.digest(),0,keyBytes,0,keyBytes.length);
cipher=Cipher.getInstance("AES/CBC/PKCS7Padding");
key=newSecretKeySpec(keyBytes,"AES");
spec=getIV();
}
publicAlgorithmParameterSpecgetIV(){
byte[]iv={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,};
IvParameterSpecivParameterSpec;
ivParameterSpec=newIvParameterSpec(iv);
returnivParameterSpec;
}
publicStringencrypt(StringplainText)throwsException{
cipher.init(Cipher.ENCRYPT_MODE,key,spec);
byte[]encrypted=cipher.doFinal(plainText.getBytes("UTF-8"));
StringencryptedText=newString(Base64.encode(encrypted,
Base64.DEFAULT),"UTF-8");
returnencryptedText;
}
publicStringdecrypt(StringcryptedText)throwsException{
cipher.init(Cipher.DECRYPT_MODE,key,spec);
byte[]bytes=Base64.decode(cryptedText,Base64.DEFAULT);
byte[]decrypted=cipher.doFinal(bytes);
StringdecryptedText=newString(decrypted,"UTF-8");
returndecryptedText;
}
}
PS：关于加密解密感兴趣的朋友还可以参考本站在线工具：
密码安全性在线检测：
高强度密码生成器：
http://tools.jb51.net/password/CreateStrongPassword
MD5在线加密工具：
http://tools.jb51.net/password/CreateMD5Password
迅雷、快车、旋风URL加密/解密工具：
http://tools.jb51.net/password/urlrethunder
在线散列/哈希算法加密工具：
http://tools.jb51.net/password/hash_encrypt
希望本文所述对大家java程序设计有所帮助。