java实现的AES加密算法完整实例_Java教程-查字典教程网

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：

import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import android.util.Base64; /** * @author vipin.cb , vipin.cb@experionglobal.com * Sep 27, 2013, 5:18:34 PM * Package:- com.veebow.util * Project:- Veebow * */ public class AESCrypt { private final Cipher cipher; private final SecretKeySpec key; private AlgorithmParameterSpec spec; public static final String SEED_16_CHARACTER = "U1MjU1M0FDOUZ.Qz"; public AESCrypt() throws Exception { // hash password with SHA-256 and crop the output to 128-bit for key MessageDigest digest = MessageDigest.getInstance("SHA-256"); digest.update(SEED_16_CHARACTER.getBytes("UTF-8")); byte[] keyBytes = new byte[32]; System.arraycopy(digest.digest(), 0, keyBytes, 0, keyBytes.length); cipher = Cipher.getInstance("AES/CBC/PKCS7Padding"); key = new SecretKeySpec(keyBytes, "AES"); spec = getIV(); } public AlgorithmParameterSpec getIV() { byte[] iv = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }; IvParameterSpec ivParameterSpec; ivParameterSpec = new IvParameterSpec(iv); return ivParameterSpec; } public String encrypt(String plainText) throws Exception { cipher.init(Cipher.ENCRYPT_MODE, key, spec); byte[] encrypted = cipher.doFinal(plainText.getBytes("UTF-8")); String encryptedText = new String(Base64.encode(encrypted, Base64.DEFAULT), "UTF-8"); return encryptedText; } public String decrypt(String cryptedText) throws Exception { cipher.init(Cipher.DECRYPT_MODE, key, spec); byte[] bytes = Base64.decode(cryptedText, Base64.DEFAULT); byte[] decrypted = cipher.doFinal(bytes); String decryptedText = new String(decrypted, "UTF-8"); return decryptedText; } }

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：

http://tools.jb51.net/password/my_password_safe

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。