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);    }}
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