import javax.crypto.Cipher;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;/** * Created by 黄俊聪 on 2017/12/15. */public class AESUtil {    public static final String KEY_ALGORITHM = "AES";    public static final String KEY_ALGORITHM_MODE = "AES/CBC/PKCS5Padding";    /**     *@Author 黄俊聪     *@Date 2017/12/15 15:44     *@Description AES对称加密     * @param data     * @param key key需要16位     */    public static String encrypt(String data,String key){        try {            SecretKeySpec spec = new SecretKeySpec(key.getBytes("UTF-8"),KEY_ALGORITHM);            Cipher cipher = Cipher.getInstance(KEY_ALGORITHM_MODE);            cipher.init(Cipher.ENCRYPT_MODE , spec,new IvParameterSpec(new byte[cipher.getBlockSize()]));            byte[] bs = cipher.doFinal(data.getBytes("UTF-8"));            return Base64Util.encode(bs);        } catch (Exception e) {            e.printStackTrace();        }        return  null;    }    /**     *@Author 黄俊聪     *@Date 2017/12/15 15:50     *@Description     * AES对称解密 key需要16位     * @param data     * @param key     * @return     */    public static String decrypt(String data, String key) {        try {            SecretKeySpec spec = new SecretKeySpec(key.getBytes("UTF-8"), KEY_ALGORITHM);            Cipher cipher = Cipher.getInstance(KEY_ALGORITHM_MODE);            cipher.init(Cipher.DECRYPT_MODE , spec , new IvParameterSpec(new byte[cipher.getBlockSize()]));            byte[] originBytes = Base64Util.decode(data);            byte[] result = cipher.doFinal(originBytes);            return new String(result,"UTF-8");        } catch (Exception e) {            e.printStackTrace();        }        return  null;    }    public static void main(String[] args) throws Exception {        /**AES加密数据**/        String key = "123456789abcdfgt";        String dataToEn = "黄俊聪";        String enResult = encrypt(dataToEn, key);        System.out.println(enResult);//        String deResult = decrypt(enResult,key);//        System.out.println(deResult);        /**RSA 加密AES的密钥**/        byte[] enKey = RSAUtil.encryptByPublicKey(key.getBytes("UTF-8"), "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCbpmF28RgRDMduGSDhB2CD 0CiOFYytTGxYQuffq5RTgdoxxsE/3dgE+qQaDsTG1yzOwwCq7X3Xye7MZlcL 5SjNiLzh5tSEG7qyAVUfAgit1gYczWM+sTg+G7pnHa/omukvOfEeWceS8P35 Xt3ShqIeKfGxU4UIdiqKonBrQtYT/wIDAQAB");        System.out.println(new String(enKey,"UTF-8"));        String baseKey = Base64Util.encode(enKey);        //服务端RSA解密AES的key        byte[] de = Base64Util.decode(baseKey);        byte[] deKeyResult = RSAUtil.decryptByPrivateKey(de);        System.out.println(new String(deKeyResult,"UTF-8"));        String deResult = decrypt(enResult,key);        System.out.println(deResult);    }

//Base64工具类 import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.OutputStream; public class Base64Util {
       private static final char[] legalChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"             .toCharArray();     public static String encode(byte[] data) {
           byte start = 0;         int len = data.length;         StringBuffer buf = new StringBuffer(data.length * 3 / 2);         int end = len - 3;         int i = start;         int n = 0;         int d;         while (i <= end) {
               d = (data[i] & 255) << 16 | (data[i + 1] & 255) << 8 | data[i + 2] & 255;             buf.append(legalChars[d >> 18 & 63]);             buf.append(legalChars[d >> 12 & 63]);             buf.append(legalChars[d >> 6 & 63]);             buf.append(legalChars[d & 63]);             i += 3;             if (n++ >= 14) {
                   n = 0;                 buf.append(" ");             }         }         if (i == start + len - 2) {
               d = (data[i] & 255) << 16 | (data[i + 1] & 255) << 8;             buf.append(legalChars[d >> 18 & 63]);             buf.append(legalChars[d >> 12 & 63]);             buf.append(legalChars[d >> 6 & 63]);             buf.append("=");         } else if (i == start + len - 1) {
               d = (data[i] & 255) << 16;             buf.append(legalChars[d >> 18 & 63]);             buf.append(legalChars[d >> 12 & 63]);             buf.append("==");         }         return buf.toString();     }     private static int decode(char c) {
           if (c >= 65 && c <= 90) {
               return c - 65;         } else if (c >= 97 && c <= 122) {
               return c - 97 + 26;         } else if (c >= 48 && c <= 57) {
               return c - 48 + 26 + 26;         } else {
               switch (c) {
               case '+':                 return 62;             case '/':                 return 63;             case '=':                 return 0;             default:                 throw new RuntimeException("unexpected code: " + c);             }         }     }     public static byte[] decode(String s) {
           ByteArrayOutputStream bos = new ByteArrayOutputStream();         try {
               decode(s, bos);         } catch (IOException var5) {
               throw new RuntimeException();         }         byte[] decodedBytes = bos.toByteArray();         try {
               bos.close();             bos = null;         } catch (IOException var4) {
               System.err.println("Error while decoding BASE64: " + var4.toString());         }         return decodedBytes;     }     private static void decode(String s, OutputStream os) throws IOException {
           int i = 0;         int len = s.length();         while (true) {
               while (i < len && s.charAt(i) <= 32) {
                   ++i;             }             if (i == len) {
                   break;             }             int tri = (decode(s.charAt(i)) << 18) + (decode(s.charAt(i + 1)) << 12) + (decode(s.charAt(i + 2)) << 6)                     + decode(s.charAt(i + 3));             os.write(tri >> 16 & 255);             if (s.charAt(i + 2) == 61) {
                   break;             }             os.write(tri >> 8 & 255);             if (s.charAt(i + 3) == 61) {
                   break;             }             os.write(tri & 255);             i += 4;         }     } }

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