accessKey=r2MHQGeUdmT6LXzR
secretKey=1TV98lz1ttXpqyiO
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;


import javax.crypto.*;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.MessageDigest;


/**
 * 加密解密工具
 *
 * @author harris
 */
public class CodingUtil {


    private static final String UTF_8 = "UTF-8";


    /**
     * JAVA 签名方法, API 调用 DEMO
     * @throws Exception
     */
    @org.junit.Test
    public void test () throws Exception {
        try {
            URL url = new URL("http://localhost:1024/prod-api/system/user/list/all");
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestProperty("Accept", "application/json;charset=UTF-8");
            urlConnection.setRequestProperty("accessKey", accessKey);
            String str = accessKey + "|" + System.currentTimeMillis();//时间戳
            String signature = aesEncrypt(str, secretKey, accessKey);
            urlConnection.setRequestProperty("signature", signature);
            InputStream is = urlConnection.getInputStream();
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len = 0;
            while (-1 != (len = is.read(buffer))) {
                baos.write(buffer, 0, len);
                baos.flush();
            }
            System.out.println(urlConnection.getResponseCode());
            System.out.println(baos.toString("utf-8"));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    /**
     * AES加密
     *
     * @param src       待加密字符串
     * @param secretKey 密钥
     * @param iv        向量
     * @return 加密后字符串
     */
    public static String aesEncrypt(String src, String secretKey, String iv) throws Exception {
        if (StringUtils.isBlank(secretKey)) {
            throw new Exception("secretKey is empty");
        }


        try {
            byte[] raw = secretKey.getBytes(UTF_8);
            SecretKeySpec secretKeySpec = new SecretKeySpec(raw, "AES");
            // "算法/模式/补码方式" ECB
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            IvParameterSpec iv1 = new IvParameterSpec(iv.getBytes());
            cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, iv1);
            byte[] encrypted = cipher.doFinal(src.getBytes(UTF_8));
            return Base64.encodeBase64String(encrypted);
        } catch (Exception e) {
            throw new Exception("AES encrypt error:", e);
        }


    }


    /**
     * AES 解密
     *
     * @param src       待解密字符串
     * @param secretKey 密钥
     * @param iv        向量
     * @return 解密后字符串
     */
    public static String aesDecrypt(String src, String secretKey, String iv) {
        if (StringUtils.isBlank(secretKey)) {
            throw new RuntimeException("secretKey is empty");
        }
        try {
            byte[] raw = secretKey.getBytes(UTF_8);
            SecretKeySpec secretKeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            IvParameterSpec iv1 = new IvParameterSpec(iv.getBytes());
            cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, iv1);
            byte[] encrypted1 = Base64.decodeBase64(src);
            byte[] original = cipher.doFinal(encrypted1);
            return new String(original, UTF_8);
        } catch (BadPaddingException | IllegalBlockSizeException e) {
            // 解密的原字符串为非加密字符串，则直接返回原字符串
            return src;
        } catch (Exception e) {
            throw new RuntimeException("decrypt error，please check parameters", e);
        }
    }


    public static String secretKey() {
        try {
            KeyGenerator keyGen = KeyGenerator.getInstance("AES");
            keyGen.init(128);
            SecretKey secretKey = keyGen.generateKey();
            return Base64.encodeBase64String(secretKey.getEncoded());
        } catch (Exception e) {
            throw new RuntimeException("generate secretKey error", e);
        }


    }
}