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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