AES加密解密工具类

AES加密解密工具类

package com.demo.utils;import java.io.UnsupportedEncodingException;import javax.crypto.Cipher;import javax.crypto.spec.SecretKeySpec;/** * AES加密解密工具类 * @author dongyangyang * @Date 2017/3/13  12:31 * @Version 1.0 * */public class AESUtils {    private static final String AES = "AES";    /**     * 必须16个字节     */    private static final String CRYPT_KEY = "dongyangyangpuff";    /**     * 加密     * @param encryptStr     * @return     */    public static byte[] encrypt(byte[] src, String key) throws Exception {        Cipher cipher = Cipher.getInstance(AES);        SecretKeySpec securekey = new SecretKeySpec(key.getBytes(), AES);        cipher.init(Cipher.ENCRYPT_MODE, securekey);        return cipher.doFinal(src);    }    /**     * 解密     * @param decryptStr     * @return     * @throws Exception     */    public static byte[] decrypt(byte[] src, String key) throws Exception {        Cipher cipher = Cipher.getInstance(AES);        SecretKeySpec securekey = new SecretKeySpec(key.getBytes(), AES);        cipher.init(Cipher.DECRYPT_MODE, securekey);        return cipher.doFinal(src);    }    public static String byte2hex(byte[] b) {        String hs = "";        String stmp = "";        for (int n = 0; n < b.length; n++) {            stmp = (Integer.toHexString(b[n] & 0XFF));            if (stmp.length() == 1)                hs = hs + "0" + stmp;            else                hs = hs + stmp;        }        return hs.toUpperCase();    }    public static byte[] hex2byte(byte[] b) {        if ((b.length % 2) != 0)            throw new IllegalArgumentException("长度不是偶数");        byte[] b2 = new byte[b.length / 2];        for (int n = 0; n < b.length; n += 2) {            String item = new String(b, n, 2);            b2[n / 2] = (byte) Integer.parseInt(item, 16);        }        return b2;    }    /**     * 解密     * @param data     * @return     * @throws Exception     */    public final static String decrypt(String data) {        try {            return new String(decrypt(hex2byte(data.getBytes()), CRYPT_KEY), "UTF-8");        } catch (Exception e) {        }        return null;    }    /**     * 加密     * @param data     * @return     * @throws UnsupportedEncodingException      * @throws Exception     */    public final static String encrypt(String data) throws UnsupportedEncodingException, Exception {        return byte2hex(encrypt(data.getBytes("UTF-8"), CRYPT_KEY));    }    public static void main(String[] args) throws UnsupportedEncodingException, Exception {        String string = encrypt("曹杰");        System.out.println(string);        String string2 = decrypt(string);        System.out.println(string2);    }}