Crypt 工具类

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class CryptUtil {
    private static final String AES = "AES";
    private static final String CHAR_SET_NAME1 = "UTF-8";
    private static final String CHAR_SET_NAME2 = "ASCII";
    private static final String CIPHER_KEY = "AES/CBC/PKCS5Padding";

    /**
     * 加密用的Key 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式，key需要为16位。
     */
    private static final String IV_PARAMETER = "a0.l954b_107x90l";
    /**
     * 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式，需要为16位。
     */
    private static final String S_KEY = "ax7x90.3k_10li5u";


    /**
     * 加密
     *
     * @param param
     * @return
     * @throws Exception
     */
    public static String encryption(String param) throws Exception {
        Cipher cipher = Cipher.getInstance(CIPHER_KEY);
        SecretKeySpec skeySpec = new SecretKeySpec(S_KEY.getBytes(), AES);
        // 使用CBC模式，需要一个向量iv，可增加加密算法的强度
        IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
        // 此处使用BASE64做转码。
        return new BASE64Encoder().encode(cipher.doFinal(param.getBytes(CHAR_SET_NAME1)));

    }

    /**
     * 解密
     *
     * @param value
     * @return
     * @throws Exception
     */
    public static String decrypt(String value) throws Exception {
        SecretKeySpec skeySpec = new SecretKeySpec(S_KEY.getBytes(CHAR_SET_NAME2), AES);
        Cipher cipher = Cipher.getInstance(CIPHER_KEY);
        IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes());
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
        // 先用base64解密
        return new String(cipher.doFinal(new BASE64Decoder().decodeBuffer(value)), CHAR_SET_NAME1);
    }


    /**
     * 测试
     */
    public static void main(String[] args) throws Exception {
        String key = "123456";
        String value = encryption(key);
        System.out.println("加密：" + encryption(key));
        System.out.println("解密：" + decrypt(value));
    }
}