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/** * 获取微信小程序 session_key 和 openid * * @param code 调用微信登陆返回的Code * @return */public static JSONObject getSessionKeyOropenid(String code) { //微信端登录code值 String wxCode = code; Locale locale = new Locale("en", "US"); ResourceBundle resource = ResourceBundle.getBundle("config/wx-config",locale); //读取属性文件 String requestUrl = resource.getString("url"); //请求地址 https://api.weixin.qq.com/sns/jscode2session Map<String, String> requestUrlParam = new HashMap<String, String>(); requestUrlParam.put("appid", resource.getString("appId")); //开发者设置中的appId requestUrlParam.put("secret", resource.getString("appSecret")); //开发者设置中的appSecret requestUrlParam.put("js_code", wxCode); //小程序调用wx.login返回的code requestUrlParam.put("grant_type", resource.getString("grantType")); //默认参数 authorization_code //发送post请求读取调用微信 https://api.weixin.qq.com/sns/jscode2session 接口获取openid用户唯一标识 JSONObject jsonObject = JSON.parseObject(sendPost(requestUrl, requestUrlParam)); return jsonObject;}/** * 向指定 URL 发送POST方法的请求 * * @param url 发送请求的 URL * @return 所代表远程资源的响应结果 */public static String sendPost(String url, Map<String, ?> paramMap) { PrintWriter out = null; BufferedReader in = null; String result = ""; String param = ""; Iterator<String> it = paramMap.keySet().iterator(); while (it.hasNext()) { String key = it.next(); param += key + "=" + paramMap.get(key) + "&"; } try { URL realUrl = new URL(url); // 打开和URL之间的连接 URLConnection conn = realUrl.openConnection(); // 设置通用的请求属性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("Accept-Charset", "utf-8"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); // 获取URLConnection对象对应的输出流 out = new PrintWriter(conn.getOutputStream()); // 发送请求参数 out.print(param); // flush输出流的缓冲 out.flush(); // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8")); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { log.error(e.getMessage(), e); } //使用finally块来关闭输出流、输入流 finally { try { if (out != null) { out.close(); } if (in != null) { in.close(); } } catch (IOException ex) { ex.printStackTrace(); } } return result;} /** * 解密用户敏感数据获取用户信息 * * @param sessionKey 数据进行加密签名的密钥 * @param encryptedData 包括敏感数据在内的完整用户信息的加密数据 * @param iv 加密算法的初始向量 * @return * */ public static JSONObject getUserInfo(String encryptedData, String sessionKey, String iv) { // 被加密的数据 byte[] dataByte = Base64Util.decodeByte(encryptedData); // 加密秘钥 byte[] keyByte = Base64Util.decodeByte(sessionKey); // 偏移量 byte[] ivByte = Base64Util.decodeByte(iv); try { // 如果密钥不足16位，那么就补足. 这个if 中的内容很重要 int base = 16; if (keyByte.length % base != 0) { int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0); byte[] temp = new byte[groups * base]; Arrays.fill(temp, (byte) 0); System.arraycopy(keyByte, 0, temp, 0, keyByte.length); keyByte = temp; } // 初始化 Security.addProvider(new BouncyCastleProvider()); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC"); SecretKeySpec spec = new SecretKeySpec(keyByte, "AES"); AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES"); parameters.init(new IvParameterSpec(ivByte)); cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化 byte[] resultByte = cipher.doFinal(dataByte); if (null != resultByte && resultByte.length > 0) { String result = new String(resultByte, "UTF-8"); return JSON.parseObject(result); } } catch (NoSuchAlgorithmException e) { log.error(e.getMessage(), e); } catch (NoSuchPaddingException e) { log.error(e.getMessage(), e); } catch (InvalidParameterSpecException e) { log.error(e.getMessage(), e); } catch (IllegalBlockSizeException e) { log.error(e.getMessage(), e); } catch (BadPaddingException e) { log.error(e.getMessage(), e); } catch (UnsupportedEncodingException e) { log.error(e.getMessage(), e); } catch (InvalidKeyException e) { log.error(e.getMessage(), e); } catch (InvalidAlgorithmParameterException e) { log.error(e.getMessage(), e); } catch (NoSuchProviderException e) { log.error(e.getMessage(), e); } return null; } |
原文：https://www.cnblogs.com/yelanggu/p/12938941.html