APP转盘抽奖Java服务端接口详解

应公司需求开发一个微信公众号中抽奖活动

功能：奖品及中奖概率可在后台配置，滚动刷新中奖名单，控制用户每日抽奖次数等。

规则：在活动期间，每日可抽奖一次，中奖后填写个人信息以便奖品的配送。

1.获取抽奖页面数据

/**
 * 获取抽奖页面数据
 * @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();

 // 用户同意授权后，能获取到code
 String code = request.getParameter("code");

 // 用户同意授权
 if (!"authdeny".equals(code)) {
 // 获取网页授权access_token
 WeixinOauth2Token weixinOauth2Token = CommonUtil
 .getOauth2AccessToken(ConfigUtil.APPID, ConfigUtil.APP_SECRECT, code);
 // 用户标识
 String openId = weixinOauth2Token.getOpenId();

 if(!StringUtil.isEmpty(openId)){

 // 查询用户信息
 List<CxhWechatMember> memberList = appLotteryService.getMemberList(openId);
 // 操作次数
 int operNum = 1; // 可写成后台可配置的
 if(memberList != null && memberList.size() > 0){
 operNum = operNum - memberList.size();
 /*// 获取用户信息
 String accessToken = CommonUtil.getAccessToken(ConfigUtil.APPID, ConfigUtil.APP_SECRECT).getToken();
 cxhWechatMember = CommonUtil.getWeChatMemberInfo(accessToken, openId);
 // 保存用户信息
 appLotteryService.saveMemberInfo(cxhWechatMember);*/
 }

 if (null == request.getParameter("activityId") || "".equals(request.getParameter("activityId"))){
 res.setResult("-2");
 res.setMsg("参数错误");
 return res;
 }
 // 查询活动信息
 CxhVoteActivity cxhVoteActivity = appLotteryService.getActivityInfo(request.getParameter("activityId"));
 if (null == cxhVoteActivity){
 res.setResult("-3");
 res.setMsg("暂无该类活动");
 return res;
 }
 CxhVoteAward cxhVoteAward = new CxhVoteAward();
 cxhVoteAward.setCxhVoteActivity(cxhVoteActivity);
 // 查询奖品列表
 List<CxhVoteAward> awardList = appLotteryService.findAwardList(cxhVoteAward);

 // 返回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("请求成功");
 res.setData(rtnMap);
 }else{
 res.setResult("-1");
 res.setMsg("授权失败");
 }

 }else{
 res.setResult("-1");
 res.setMsg("授权失败");
 }
 return res;
}

2.中奖名单接口

/**
 * 中奖名单接口
 * @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"); // 中奖
 // 查询中奖用户名单（分页）
 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("成功");
 } catch (Exception e) {
 appResult.setResult(-9);
 appResult.setMsg("系统异常");
 logger.info(e.toString(), e);
 }
 return appResult;
}

3.抽奖接口

/**
 * 抽奖接口
 * @author lee
 * @return
 */
@ResponseBody
@RequestMapping(value = "/doLottery")
public Object doLottery(HttpServletRequest request, HttpServletResponse response) {
 AppListReturn appResult = new AppListReturn();
 // 返回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("参数错误");
 return appResult;
 }
 // 查询活动信息
 CxhVoteActivity cxhVoteActivity = appLotteryService.getActivityInfo(request.getParameter("activityId"));
 if (null == cxhVoteActivity){
 appResult.setResult(-3);
 appResult.setMsg("暂无该类活动");
 return appResult;
 }
 CxhVoteAward cxhVoteAward = new CxhVoteAward();
 cxhVoteAward.setCxhVoteActivity(cxhVoteActivity);
 // 查询奖品列表
 List<CxhVoteAward> awardList = appLotteryService.findAwardList(cxhVoteAward);

 Random rd = new Random();
 double dd = rd.nextDouble();
 double before = 0;
 double end = 0;
 cxhVoteAward.setLevel("5"); // 5-未中奖

 // 计算中奖概率
 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){
  // 中奖奖品
  cxhVoteAward = awardList.get(i);
  // 修改奖品剩余数量
  cxhVoteAward.setLeftnum(cxhVoteAward.getLeftnum() - 1);
  appLotteryService.updateAwardNumber(cxhVoteAward);
 }
 break;
 }
 }

 // 新增用户操作记录
 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");
 // 保存用户信息
 appLotteryService.saveMemberInfo(cxhWechatMember);

 rtnMap.put("awardLevel", cxhVoteAward.getLevel());
 rtnMap.put("awardId", cxhVoteAward.getId());
 appResult.setData(rtnMap);
 appResult.setResult(0);
 appResult.setMsg("成功");
 } catch (Exception e) {
 appResult.setResult(-9);
 appResult.setMsg("系统异常");
 logger.info(e.toString(), e);
 }
 return appResult;
}

4.保存中奖用户信息的接口

/**
 * 保存中奖用户信息的接口
 * @author lee
 * @return
 */
@ResponseBody
@RequestMapping(value = "/saveMemberInfo")
public Object saveMemberInfo(HttpServletRequest request, HttpServletResponse response) {
 AppListReturn appResult = new AppListReturn();
 try {

 // 用户同意授权后，能获取到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("参数错误");
 return appResult;
 }

 // 查询用户信息
 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("成功");

 } catch (Exception e) {
 appResult.setResult(-9);
 appResult.setMsg("系统异常");
 logger.info(e.toString(), e);
 }
 return appResult;
}

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