java實現的AES加密算法完整實例

本文實例講述了java實現的AES加密算法。分享給大家供大家參考，具體如下：

 import javax.crypto.Cipher;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;import android.util.Base64;/** * @author vipin.cb , [email protected] <br> * Sep 27, 2013, 5:18:34 PM <br> * Package:- <b>com.veebow.util</b> <br> * Project:- <b>Veebow</b> * <p> */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：關於加密解密感興趣的朋友還可以參考本站在線工具：

密碼安全性在線檢測：
http://tools.VeVB.COm/password/my_password_safe

高強度密碼生成器：
http://tools.VeVB.COm/password/CreateStrongPassword

MD5在線加密工具：
http://tools.VeVB.COm/password/CreateMD5Password

迅雷、快車、旋風URL加密/解密工具：
http://tools.VeVB.COm/password/urlrethunder

在線散列/哈希算法加密工具：
http://tools.VeVB.COm/password/hash_encrypt

希望本文所述對大家java程序設計有所幫助。