weChatpay完整版java

注意要点： 1，Topay里面的参数要填好：appid，appsecret，mch_id，partnerkey，spbill_create_ip 2，openid 需要微信授权获取到 3，每次支付orderNo要不同 openid参考实例： 1，授权链接地址：https://open.weixin.qq.com/connect/oauth2/authorize?appid=wxba3445566677&redirect_uri=http://www.acc.com/weixin/pay/paydispatcher&response_type=code&scope=snsapi_userinfo&state=123#wechat_redirect 2,转向处理地址：通过第一个链接微信会把code传过来，之前参数获取就行 @RequestMapping(value = "/paydispatcher", method = { RequestMethod.GET }) public void payDispatcher(HttpServletRequest request, HttpServletResponse response) throws Exception { String code = request.getParameter("code"); String msg=""; if(code==null||code.equals("")){ msg="获取微信Code失败！"; request.setAttribute("msg" ,msg); request.getRequestDispatcher("/jsp/login.jsp").forward(request,response); }else{ WeixinUtil util = new WeixinUtil(); UserAccessToken token = (UserAccessToken) request.getSession().getAttribute("UserAccessToken"); if(null==token){ token = util.getAccessToken3(Constants.APPID, Constants.SECRET,code); request.getSession().setAttribute("UserAccessToken",token); } request.setAttribute("openid", token.getOpenid()); request.setAttribute("accessToken", token.getAccessToken()); request.setAttribute("refreshToken", token.getRefreshToken()); request.setAttribute("expiresIn", token.getExpiresIn()); request.getRequestDispatcher("/pay/index.jsp").forward(request,response); } } // 获取用户openid accesstoken public static UserAccessToken getAccessToken3(String appid , String appsecret,String code) { UserAccessToken accessToken = null; String requestUrl = Constants.GET_OPENID_ACCESSTOKEN_URL.replace("APPID" , appid).replace("APPSECRET" , appsecret).replace("CODE" , code); String json = httpRequest(requestUrl , "GET" , null); JSONObject jsonObject = JSONObject.fromObject(json); // 如果请求成功 if (null != jsonObject) { try { accessToken = new UserAccessToken(); accessToken.setAccessToken(jsonObject.getString("access_token")); accessToken.setRefreshToken(jsonObject.getString("refresh_token")); accessToken.setExpiresIn(jsonObject.getInt("expires_in")); accessToken.setOpenid(jsonObject.getString("openid")); accessToken.setScope(jsonObject.getString("scope")); } catch (Exception e) { accessToken = null; // 获取token失败 System.out.println("获取token失败 errcode:{} errmsg:{}"); } } return accessToken; }