base64加密解密

package com.sms.utils;


import java.util.HashMap;
import java.util.Map;

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

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;

import com.alibaba.fastjson.JSONObject;


public class AESUtils {
    public static String key = "123456!@#";
    public static String iv = "1234567812345678";

    /**
     * 加密
     *
     * @param data
     * @return
     */
    public static String encrypt(String data) throws Exception {

        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        int blockSize = cipher.getBlockSize();

        byte[] dataBytes = data.getBytes();
        int plaintextLength = dataBytes.length;
        if (plaintextLength % blockSize != 0) {
            plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
        }

        byte[] plaintext = new byte[plaintextLength];
        System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);

        SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
        IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

        cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
        byte[] encrypted = cipher.doFinal(plaintext);
        return Base64.encodeBase64String(encrypted);

    }


    /**
     * 解密
     *
     * @param data
     * @return
     */
    public static String desEncrypt(String data) throws Exception {
    	//base64加密串在http中会把"+"号变为" "
    	data = StringUtils.replace(data, " ", "+");
//        byte[] contentBytes = Base64.decode(data, 0);
        byte[] contentBytes = Base64.decodeBase64(data);
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
        IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

        cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);

        byte[] original = cipher.doFinal(contentBytes);
        String originalString = new String(original);
        return originalString;

    }

    public static void main(String[] args) throws Exception {
		Map<String, String> map = new HashMap<String, String>();
//		map.put("username", "admin");
//		map.put("password", "123456");
		System.out.println(AESUtils.encrypt(JSONUtil.toJson(map)));
	}

}