package com.skynet.rimp.common.utils.string;

 import java.io.UnsupportedEncodingException;

 import java.security.InvalidKeyException;

 import java.security.NoSuchAlgorithmException;

 import java.security.SecureRandom;

 import javax.crypto.BadPaddingException;

 import javax.crypto.Cipher;

 import javax.crypto.IllegalBlockSizeException;

 import javax.crypto.KeyGenerator;

 import javax.crypto.NoSuchPaddingException;

 import javax.crypto.SecretKey;

 import javax.crypto.spec.SecretKeySpec;

 public class AESUtil {

     private static final String key = "yunyou17lw";

     /**

      * 加密

      * @param content 需要加密的内容

      * @param password  加密密码

      * @return

      */

     private static byte[] encryptByte(String content, String password) {

         try {

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

             kgen.init(128, new SecureRandom(password.getBytes()));

             SecretKey secretKey = kgen.generateKey();

             byte[] enCodeFormat = secretKey.getEncoded();

             SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");

             Cipher cipher = Cipher.getInstance("AES");// 创建密码器

             byte[] byteContent = content.getBytes("utf-8");

             cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化

             byte[] result = cipher.doFinal(byteContent);

             return result; // 加密

         } catch (NoSuchAlgorithmException e) {

             e.printStackTrace();

         } catch (NoSuchPaddingException e) {

             e.printStackTrace();

         } catch (InvalidKeyException e) {

             e.printStackTrace();

         } catch (UnsupportedEncodingException e) {

             e.printStackTrace();

         } catch (IllegalBlockSizeException e) {

             e.printStackTrace();

         } catch (BadPaddingException e) {

             e.printStackTrace();

         }

         return null;

     }

     /**

      * 解密

      * @param content  待解密内容

      * @param password 解密密钥

      * @return

      */

     private static byte[] decryptByte(byte[] content, String password) {

         try {

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

             kgen.init(128, new SecureRandom(password.getBytes()));

             SecretKey secretKey = kgen.generateKey();

             byte[] enCodeFormat = secretKey.getEncoded();

             SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");

             Cipher cipher = Cipher.getInstance("AES");// 创建密码器

             cipher.init(Cipher.DECRYPT_MODE, key);// 初始化

             byte[] result = cipher.doFinal(content);

             return result; // 加密

         } catch (NoSuchAlgorithmException e) {

             e.printStackTrace();

         } catch (NoSuchPaddingException e) {

             e.printStackTrace();

         } catch (InvalidKeyException e) {

             e.printStackTrace();

         } catch (IllegalBlockSizeException e) {

             e.printStackTrace();

         } catch (BadPaddingException e) {

             e.printStackTrace();

         }

         return null;

     }

     /**

      * AES加密

      * @param str

      * @return

      */

     public static String encrypt(String str) {

         return BinaryHex.binary2Hex(encryptByte(str, key));

     }

     /**

      * AES解密

      * @param str

      * @return

      */

     public static String decrypt(String str) throws UnsupportedEncodingException {

         // 16进制转2进制

         byte[] decryptFrom = BinaryHex.hex2Byte(str);

         // 根据byte进行解码

         byte[] decryptResult = decryptByte(decryptFrom, key);

         return new String(decryptResult,"UTF-8");

     }

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

         String str = "发多少房间打扫看来减肥鲁大师 <br>///fdsfds房贷首付斯蒂芬是";

         // 加密

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

         String s = AESUtil.encrypt(str);

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

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

     }

 }

 package com.skynet.rimp.common.utils.string;

 /**

  * 2进制/16进制互转

  *

  * @author Jieven

  * @date 2014-5-12

  */

 public class BinaryHex {

     /**

      * 2进制转16进制

      * @param bString 2进制字符串

      * @return

      */

     public static String binary2Hex(String bString) {

         if (bString == null || bString.equals("") || bString.length() % 8 != 0)

             return null;

         StringBuffer tmp = new StringBuffer();

         int iTmp = 0;

         for (int i = 0; i < bString.length(); i += 4) {

             iTmp = 0;

             for (int j = 0; j < 4; j++) {

                 iTmp += Integer.parseInt(bString.substring(i + j, i + j + 1)) << (4 - j - 1);

             }

             tmp.append(Integer.toHexString(iTmp));

         }

         return tmp.toString();

     }

     /**

      * 16进制转2进制

      * @param hexString

      * @return

      */

     public static String hex2Binary(String hexString) {

         if (hexString == null || hexString.length() % 2 != 0)

             return null;

         String bString = "", tmp;

         for (int i = 0; i < hexString.length(); i++) {

             tmp = "0000" + Integer.toBinaryString(Integer.parseInt(hexString.substring(i, i + 1), 16));

             bString += tmp.substring(tmp.length() - 4);

         }

         return bString;

     }

     /**

      * 将二进制转换成16进制

      * @param buf

      * @return

      */

     public static String binary2Hex(byte buf[]) {

         StringBuffer sb = new StringBuffer();

         for (int i = 0; i < buf.length; i++) {

             String hex = Integer.toHexString(buf[i] & 0xFF);

             if (hex.length() == 1) {

                 hex = '0' + hex;

             }

             sb.append(hex.toUpperCase());

         }

         return sb.toString();

     }

     /**

      * 将16进制转换为二进制

      * @param hexStr

      * @return

      */

     public static byte[] hex2Byte(String hexStr) {

         if (hexStr.length() < 1)

             return null;

         byte[] result = new byte[hexStr.length() / 2];

         for (int i = 0; i < hexStr.length() / 2; i++) {

             int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);

             int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);

             result[i] = (byte) (high * 16 + low);

         }

         return result;

     }

     public static void main(String[] args) {

         String bString = "1010101111001101";

         System.out.println(binary2Hex(bString));

         String hexString = "ABCD";

         System.out.println(hex2Binary(hexString));

     }

 }