springmvc中自己实现的token防表单重复提交,防止二次提交

1、springmvc 中自己实现的 token 防表单重复提交 ,防止二次提代码简介springmvc 中自己实现的 token 防表单重复提交 ,防止二次提 交！代码片段一：首先创立一个 token 处理类 ，这里的 类名叫 TokenHandler private static Logger logger = Logger.getLogger(TokenHandler.class);static Map springmvc_token = new HashMap();/ 生成一个唯一值的 tokenSuppressWarnings(unchecked)public synchronized

2、static String generateGUID(HttpSession session) String token = ;try Object obj = session.getAttribute(SPRINGMVC.TOKEN);if(obj!=null)springmvc_token = (Map)session.getAttribute(SPRINGMVC.TOKEN);token = new BigInteger(165, new Random().toString(36).toUpperCase();E + . + token,token); session.setAttrib

3、ute(SPRINGMVC.TOKEN, springmvc_token);Constants.TOKEN_V ALUE = token; catch (IllegalStateException e) logger.error(generateGUID() mothod find bug,by token session.);return token;/验证表单token值和session中的token值是否一致SuppressWarnings(unchecked)public static boolean validToken(HttpServletRequest request)Stri

4、ng inputToken = getInputToken(request);if (inputToken = null) logger.warn(token is not valid!inputToken is NULL);return false;HttpSession session = request.getSession();Map tokenMap = (Map) session.getAttribute(SPRINGMVC.TOKEN);if (tokenMap = null | tokenMap.size() 1) logger.warn(token is not valid!

5、sessionToken is NULL);return false;String sessionToken = tokenMap.get(Constants.DEFAULT_TOKEN_NAME + . + inputToken);if (!inputToken.equals(sessionToken) logger.warn(token is not valid!inputToken= +inputToken+ ,sessionToken = + sessionToken + ); return false;tokenMap.remove(Constants.DEFAULT_TOKEN_N

6、AME + . + inputToken);session.setAttribute(SPRINGMVC.TOKEN, tokenMap);return true;/ 获取表单中 token 值SuppressWarnings(unchecked)public static String getInputToken(HttpServletRequest request) Map params = request.getParameterMap();if(!params.containsKey(Constants.DEFAULT_TOKEN_NAME) logger.warn(Could not find token name in params.); return null;String tokens = (String) (String) params .get(Constants.DEFAULT_TOKEN_NAME);i