???????? 提前聲明一下:此工具類忘記出處了，很抱歉，如果原創(chuàng)遇上了我立馬上您的鏈接：

加密解密的工具類DataEncryptUtil：

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package org.util;import java.security.MessageDigest; import javax.crypto.KeyGenerator; import javax.crypto.Mac; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; /** * data encrypt utls * * @author skyline * */ public class DataEncryptUtil { public static final String KEY_SHA = "SHA"; public static final String KEY_MD5 = "MD5"; /** * MAC算法可選以下多種算法 * * <pre> * HmacMD5 * HmacSHA1 * HmacSHA256 * HmacSHA384 * HmacSHA512 * </pre> */ public static final String KEY_MAC = "HmacMD5"; /** * BASE64解密 * * @param key = 需要解密的密碼字符串 * @return * @throws Exception */ public static byte[] decryptBASE64(String key) throws Exception { return (new BASE64Decoder()).decodeBuffer(key); } /** * BASE64加密 * * @param key = 需要加密的字符數(shù)組 * @return * @throws Exception */ public static String encryptBASE64(byte[] key) throws Exception { return (new BASE64Encoder()).encodeBuffer(key); } /** * MD5加密 * * @param data = 需要加密的字符數(shù)組 * @return * @throws Exception */ public static byte[] encryptMD5(byte[] data) throws Exception { MessageDigest md5 = MessageDigest.getInstance(KEY_MD5); md5.update(data); return md5.digest(); } /** * SHA加密 * * @param data = 需要加密的字符數(shù)組 * @return * @throws Exception */ public static byte[] encryptSHA(byte[] data) throws Exception { MessageDigest sha = MessageDigest.getInstance(KEY_SHA); sha.update(data); return sha.digest(); } /** * 初始化HMAC密鑰 * * @return * @throws Exception */ public static String initMacKey() throws Exception { KeyGenerator keyGenerator = KeyGenerator.getInstance(KEY_MAC); SecretKey secretKey = keyGenerator.generateKey(); return encryptBASE64(secretKey.getEncoded()); } /** * HMAC加密 * * @param data = 密匙加密過的字符數(shù)組 * @param key = 需要加密的字符串 * @return * @throws Exception */ public static byte[] encryptHMAC(byte[] data, String key) throws Exception { SecretKey secretKey = new SecretKeySpec(decryptBASE64(key), KEY_MAC); Mac mac = Mac.getInstance(secretKey.getAlgorithm()); mac.init(secretKey); return mac.doFinal(data); } }
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