APP Turntable Draw Java Service side Interface Details

Develop a WeChat Public Number lottery in response to company needs

Functions: The prize and winning probability can be configured in the background, scroll to refresh the winning list, control the number of lottery draw per day, etc.

Rule: During the activity, you can draw a lottery once a day. Fill in personal information after winning to facilitate the distribution of prizes.

1. Get data from the lottery page

/**
 *  Get lottery page data 
 * @param request
 * @param response
 * @return
 * @throws ServletException
 * @throws IOException
 */
@RequestMapping(value="/queryLotteryActivity")
@ResponseBody
public AppIntReturn queryLotteryActivity(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException {
 AppIntReturn res = new AppIntReturn();
 
 //  Once the user agrees to authorize, he or she can obtain code
 String code = request.getParameter("code");
 
 //  User agrees to authorize 
 if (!"authdeny".equals(code)) {
 //  Obtain Web Page Authorization access_token
 WeixinOauth2Token weixinOauth2Token = CommonUtil
 .getOauth2AccessToken(ConfigUtil.APPID, ConfigUtil.APP_SECRECT, code);
 //  User ID 
 String openId = weixinOauth2Token.getOpenId();
 
 if(!StringUtil.isEmpty(openId)){
 
 //  Query user information 
 List<CxhWechatMember> memberList = appLotteryService.getMemberList(openId);
 //  Number of operations 
 int operNum = 1; //  Writable as background configurable 
 if(memberList != null && memberList.size() > 0){
 operNum = operNum - memberList.size();
 /*//  Get user information 
 String accessToken = CommonUtil.getAccessToken(ConfigUtil.APPID, ConfigUtil.APP_SECRECT).getToken();
 cxhWechatMember = CommonUtil.getWeChatMemberInfo(accessToken, openId);
 //  Save user information 
 appLotteryService.saveMemberInfo(cxhWechatMember);*/
 }
 
 if (null == request.getParameter("activityId") || "".equals(request.getParameter("activityId"))){
 res.setResult("-2");
 res.setMsg(" Parameter error ");
 return res;
 }
 //  Query activity information 
 CxhVoteActivity cxhVoteActivity = appLotteryService.getActivityInfo(request.getParameter("activityId"));
 if (null == cxhVoteActivity){
 res.setResult("-3");
 res.setMsg(" This type of activity is temporarily unavailable ");
 return res;
 }
 CxhVoteAward cxhVoteAward = new CxhVoteAward();
 cxhVoteAward.setCxhVoteActivity(cxhVoteActivity);
 //  Query prize list 
 List<CxhVoteAward> awardList = appLotteryService.findAwardList(cxhVoteAward);
 
 //  Return Map
 Map<String, Object> rtnMap = new HashMap<String, Object>();
 rtnMap.put("activity", cxhVoteActivity);
 rtnMap.put("awardList", awardList);
 rtnMap.put("operNum", operNum);
 rtnMap.put("openId", openId);
 
 res.setResult("0");
 res.setMsg(" Request succeeded ");
 res.setData(rtnMap);
 }else{
 res.setResult("-1");
 res.setMsg(" privilege grant failed ");
 }
 
 }else{
 res.setResult("-1");
 res.setMsg(" privilege grant failed ");
 }
 return res;
}

2. Winner List Interface

/**
 *  Winner List Interface 
 * @author lee
 * @return
 */
@ResponseBody
@RequestMapping(value = "/winningMemberList")
public Object queryWinningMemberList(HttpServletRequest request, HttpServletResponse response) {
 AppListReturn appResult = new AppListReturn();
 try {
 CxhWechatMember cxhWechatMember = new CxhWechatMember();
 cxhWechatMember.setIswinning("1"); //  Win the prize 
 //  Query winner list (paging) 
 Page<CxhWechatMember> pageList = appLotteryService.findPage(new Page<CxhWechatMember>(request, response), cxhWechatMember);
 appResult.setData(pageList.getList());
 appResult.setPageNumber(pageList.getPageNo());
 appResult.setPageSize(pageList.getPageSize());
 appResult.setTotal((int) pageList.getCount());
 appResult.setTotalPages(pageList.getTotalPage());
 appResult.setResult(0);
 appResult.setMsg(" Success ");
 } catch (Exception e) {
 appResult.setResult(-9);
 appResult.setMsg(" System exception ");
 logger.info(e.toString(), e);
 }
 return appResult;
}

3. Draw Interface

/**
 *  Draw Interface 
 * @author lee
 * @return
 */
@ResponseBody
@RequestMapping(value = "/doLottery")
public Object doLottery(HttpServletRequest request, HttpServletResponse response) {
 AppListReturn appResult = new AppListReturn();
 //  Return Map
 Map<String, Object> rtnMap = new HashMap<String, Object>();
 String activityId = request.getParameter("activityId");
 String openId = request.getParameter("openId");
 try {
 
 if (null == activityId || "".equals(activityId) || null == openId || "".equals(openId)){
 appResult.setResult(-2);
 appResult.setMsg(" Parameter error ");
 return appResult;
 }
 //  Query activity information 
 CxhVoteActivity cxhVoteActivity = appLotteryService.getActivityInfo(request.getParameter("activityId"));
 if (null == cxhVoteActivity){
 appResult.setResult(-3);
 appResult.setMsg(" This type of activity is temporarily unavailable ");
 return appResult;
 }
 CxhVoteAward cxhVoteAward = new CxhVoteAward();
 cxhVoteAward.setCxhVoteActivity(cxhVoteActivity);
 //  Query prize list 
 List<CxhVoteAward> awardList = appLotteryService.findAwardList(cxhVoteAward);
 
 Random rd = new Random();
 double dd = rd.nextDouble();
 double before = 0;
 double end = 0;
 cxhVoteAward.setLevel("5"); // 5- Not winning 
 
 //  Calculate the winning probability 
 for (int i = 0; i < awardList.size(); i++) {
 if(i > 0){
 before += awardList.get(i-1).getRate().doubleValue();
 }
 end += awardList.get(i).getRate().doubleValue();
 if(dd >= before && dd < end){
 if(awardList.get(i).getLeftnum() > 0){
  //  Winning Prize 
  cxhVoteAward = awardList.get(i);
  //  Modify Remaining Prize Quantity 
  cxhVoteAward.setLeftnum(cxhVoteAward.getLeftnum() - 1);
  appLotteryService.updateAwardNumber(cxhVoteAward);
 }
 break;
 }
 }
 
 //  Add User Action Record 
 String accessToken = CommonUtil.getAccessToken(ConfigUtil.APPID, ConfigUtil.APP_SECRECT).getToken();
 CxhWechatMember cxhWechatMember = CommonUtil.getWeChatMemberInfo(accessToken, openId);
 cxhWechatMember.setId(IdGen.uuid());
 cxhWechatMember.setJoindate(new Date());
 cxhWechatMember.setDelFlag("0");
 //  Save user information 
 appLotteryService.saveMemberInfo(cxhWechatMember);
 
 rtnMap.put("awardLevel", cxhVoteAward.getLevel());
 rtnMap.put("awardId", cxhVoteAward.getId());
 appResult.setData(rtnMap);
 appResult.setResult(0);
 appResult.setMsg(" Success ");
 } catch (Exception e) {
 appResult.setResult(-9);
 appResult.setMsg(" System exception ");
 logger.info(e.toString(), e);
 }
 return appResult;
}

4. Interface for saving winner user information

/**
 *  Interface for saving winner user information 
 * @author lee
 * @return
 */
@ResponseBody
@RequestMapping(value = "/saveMemberInfo")
public Object saveMemberInfo(HttpServletRequest request, HttpServletResponse response) {
 AppListReturn appResult = new AppListReturn();
 try {
 
 //  Once the user agrees to authorize, he or she can obtain code
 String openId = request.getParameter("openId");
 String username = request.getParameter("username");
 String phone = request.getParameter("phone");
 String address = request.getParameter("address");
 String awardLevel = request.getParameter("awardLevel");
 String awardId = request.getParameter("awardId");
 
 if (null == username || "".equals(username)
 || null == phone || "".equals(phone)
 || null == address || "".equals(address)
 || null == openId || "".equals(openId)
 || null == awardLevel || "".equals(awardLevel)
 || null == awardId || "".equals(awardId)){
 appResult.setResult(-2);
 appResult.setMsg(" Parameter error ");
 return appResult;
 }
 
 //  Query user information 
 List<CxhWechatMember> memberList = appLotteryService.getMemberList(openId);
 CxhWechatMember cxhWechatMember = memberList.get(0);
 cxhWechatMember.setUsername(username);
 cxhWechatMember.setPhone(phone);
 cxhWechatMember.setAddress(address);
 cxhWechatMember.setIswinning(awardLevel == "5" ? "0" : "1");
 cxhWechatMember.setAwardid(awardId);
 appLotteryService.update(cxhWechatMember);
 
 appResult.setResult(0);
 appResult.setMsg(" Success ");
 
 } catch (Exception e) {
 appResult.setResult(-9);
 appResult.setMsg(" System exception ");
 logger.info(e.toString(), e);
 }
 return appResult;
}