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【AES】

一種對稱加密算法，DES的取代者。

加密相關文章見：Java 加密解密 對稱加密算法 非對稱加密算法 MD5 BASE64 AES RSA

【代碼】

代碼比較多，有一部分非本文章內容代碼，具體自己看吧。

[java] view plaincopy

package?com.uikoo9.util.encrypt;??

??

import?java.math.BigInteger;??

import?java.security.MessageDigest;??

import?java.security.SecureRandom;??

??

import?javax.crypto.Cipher;??

import?javax.crypto.KeyGenerator;??

import?javax.crypto.spec.SecretKeySpec;??

??

import?sun.misc.BASE64Decoder;??

import?sun.misc.BASE64Encoder;??

??

import?com.uikoo9.util.QStringUtil;??

??

/**?

?*?編碼工具類?

?*?1.將byte[]轉為各種進制的字符串?

?*?2.base?64?encode?

?*?3.base?64?decode?

?*?4.獲取byte[]的md5值?

?*?5.獲取字符串md5值?

?*?6.結合base64實現md5加密?

?*?7.AES加密?

?*?8.AES加密為base?64?code?

?*?9.AES解密?

?*?10.將base?64?code?AES解密?

?*?@author?uikoo9?

?*?@version?0.0.7.20140601?

?*/??

public?class?QEncodeUtil?{??

??????

????public?static?void?main(String[]?args)?throws?Exception?{??

????????String?content?=?"我愛你";??

????????System.out.println("加密前："?+?content);??

??

????????String?key?=?"123456";??

????????System.out.println("加密密鑰和解密密鑰："?+?key);??

??????????

????????String?encrypt?=?aesEncrypt(content,?key);??

????????System.out.println("加密后："?+?encrypt);??

??????????

????????String?decrypt?=?aesDecrypt(encrypt,?key);??

????????System.out.println("解密后："?+?decrypt);??

????}??

??????

????/**?

?????*?將byte[]轉為各種進制的字符串?

?????*?@param?bytes?byte[]?

?????*?@param?radix?可以轉換進制的范圍，從Character.MIN_RADIX到Character.MAX_RADIX，超出范圍后變為10進制?

?????*?@return?轉換后的字符串?

?????*/??

????public?static?String?binary(byte[]?bytes,?int?radix){??

????????return?new?BigInteger(1,?bytes).toString(radix);//?這里的1代表正數??

????}??

??????

????/**?

?????*?base?64?encode?

?????*?@param?bytes?待編碼的byte[]?

?????*?@return?編碼后的base?64?code?

?????*/??

????public?static?String?base64Encode(byte[]?bytes){??

????????return?new?BASE64Encoder().encode(bytes);??

????}??

??????

????/**?

?????*?base?64?decode?

?????*?@param?base64Code?待解碼的base?64?code?

?????*?@return?解碼后的byte[]?

?????*?@throws?Exception?

?????*/??

????public?static?byte[]?base64Decode(String?base64Code)?throws?Exception{??

????????return?QStringUtil.isEmpty(base64Code)???null?:?new?BASE64Decoder().decodeBuffer(base64Code);??

????}??

??????

????/**?

?????*?獲取byte[]的md5值?

?????*?@param?bytes?byte[]?

?????*?@return?md5?

?????*?@throws?Exception?

?????*/??

????public?static?byte[]?md5(byte[]?bytes)?throws?Exception?{??

????????MessageDigest?md?=?MessageDigest.getInstance("MD5");??

????????md.update(bytes);??

??????????

????????return?md.digest();??

????}??

??????

????/**?

?????*?獲取字符串md5值?

?????*?@param?msg??

?????*?@return?md5?

?????*?@throws?Exception?

?????*/??

????public?static?byte[]?md5(String?msg)?throws?Exception?{??

????????return?QStringUtil.isEmpty(msg)???null?:?md5(msg.getBytes());??

????}??

??????

????/**?

?????*?結合base64實現md5加密?

?????*?@param?msg?待加密字符串?

?????*?@return?獲取md5后轉為base64?

?????*?@throws?Exception?

?????*/??

????public?static?String?md5Encrypt(String?msg)?throws?Exception{??

????????return?QStringUtil.isEmpty(msg)???null?:?base64Encode(md5(msg));??

????}??

??????

????/**?

?????*?AES加密?

?????*?@param?content?待加密的內容?

?????*?@param?encryptKey?加密密鑰?

?????*?@return?加密后的byte[]?

?????*?@throws?Exception?

?????*/??

????public?static?byte[]?aesEncryptToBytes(String?content,?String?encryptKey)?throws?Exception?{??

????????KeyGenerator?kgen?=?KeyGenerator.getInstance("AES");??

????????kgen.init(128,?new?SecureRandom(encryptKey.getBytes()));??

??

????????Cipher?cipher?=?Cipher.getInstance("AES");??

????????cipher.init(Cipher.ENCRYPT_MODE,?new?SecretKeySpec(kgen.generateKey().getEncoded(),?"AES"));??

??????????

????????return?cipher.doFinal(content.getBytes("utf-8"));??

????}??

??????

????/**?

?????*?AES加密為base?64?code?

?????*?@param?content?待加密的內容?

?????*?@param?encryptKey?加密密鑰?

?????*?@return?加密后的base?64?code?

?????*?@throws?Exception?

?????*/??

????public?static?String?aesEncrypt(String?content,?String?encryptKey)?throws?Exception?{??

????????return?base64Encode(aesEncryptToBytes(content,?encryptKey));??

????}??

??????

????/**?

?????*?AES解密?

?????*?@param?encryptBytes?待解密的byte[]?

?????*?@param?decryptKey?解密密鑰?

?????*?@return?解密后的String?

?????*?@throws?Exception?

?????*/??

????public?static?String?aesDecryptByBytes(byte[]?encryptBytes,?String?decryptKey)?throws?Exception?{??

????????KeyGenerator?kgen?=?KeyGenerator.getInstance("AES");??

????????kgen.init(128,?new?SecureRandom(decryptKey.getBytes()));??

??????????

????????Cipher?cipher?=?Cipher.getInstance("AES");??

????????cipher.init(Cipher.DECRYPT_MODE,?new?SecretKeySpec(kgen.generateKey().getEncoded(),?"AES"));??

????????byte[]?decryptBytes?=?cipher.doFinal(encryptBytes);??

??????????

????????return?new?String(decryptBytes);??

????}??

??????

????/**?

?????*?將base?64?code?AES解密?

?????*?@param?encryptStr?待解密的base?64?code?

?????*?@param?decryptKey?解密密鑰?

?????*?@return?解密后的string?

?????*?@throws?Exception?

?????*/??

????public?static?String?aesDecrypt(String?encryptStr,?String?decryptKey)?throws?Exception?{??

????????return?QStringUtil.isEmpty(encryptStr)???null?:?aesDecryptByBytes(base64Decode(encryptStr),?decryptKey);??

????}??

??????

}??

【輸出】

[java] view plaincopy

加密前：我愛你??

加密密鑰和解密密鑰：123456??

加密后：A63fa7DjAe3yYji44BTm1g==??

解密后：我愛你?

轉載于:https://www.cnblogs.com/Free-Thinker/p/5824641.html

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