AES加密

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package com.test.util.encrypt;   import org.apache.commons.lang3.StringUtils; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder;   import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.spec.SecretKeySpec; import java.math.BigInteger; import java.security.MessageDigest; import java.security.SecureRandom;   /**  * 一些简单的编码测试  * Created by miaorf on 2016/4/24.  */ public class AESEncrypt {     public static void main(String[] args) throws Exception {         String content = "我爱你";         System.out.println("加密前：" + content);           String key = "123456";         System.out.println("加密密钥和解密密钥：" + 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);     }           /**      * base 64 encode      *      * @param bytes 待编码的byte[]      * @return 编码后的base 64 code      */     public static String base64Encode(byte[] bytes) {         return new BASE64Encoder().encode(bytes);     }       /**      * base 64 decode      *      * @param base64Code 待解码的base 64 code      * @return 解码后的byte[]      * @throws Exception      */     public static byte[] base64Decode(String base64Code) throws Exception {         return StringUtils.isEmpty(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code);     }       /**      * AES加密      *      * @param content    待加密的内容      * @param encryptKey 加密密钥      * @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加密为base 64 code      *      * @param content    待加密的内容      * @param encryptKey 加密密钥      * @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   解密密钥      * @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);     }       /**      * 将base 64 code AES解密      *      * @param encryptStr 待解密的base 64 code      * @param decryptKey 解密密钥      * @return 解密后的string      * @throws Exception      */     public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {         return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);     } }