基于SpringBoot的抽奖系统

一、项目简介

业务范围：该系统主要为公司活动（如年会等）提供在线抽奖功能，满足奖品、抽奖人员的管理，及抽奖活动的需要.
开发环境与技术栈：Windows、Maven、Lombok、Spring、SpringMVC、SpringBoot MySQL、Mybatis、Druid.
主要功能：用户注册、用户登录、奖项设置（增删改查）、抽奖人员设置（增删改查）、抽奖、删除获奖人员.

二、数据库设计

分析具体业务后数据库表设计如下

drop database if exists lucky_draw;
create database lucky_draw character set utf8mb4;use lucky_draw;drop table if exists user;
create table user(id int primary key auto_increment,username varchar(20) not null unique comment '用户账号',password varchar(20) not null comment '密码',nickname varchar(20) comment '用户昵称',email varchar(50) comment '邮箱',age int comment '年龄',head varchar(255) comment '头像url',create_time timestamp default NOW() comment '创建时间'
) comment '用户表';drop table if exists setting;
create table setting(id int primary key auto_increment,user_id int not null comment '用户id',batch_number int not null comment '每次抽奖人数',create_time timestamp default NOW() comment '创建时间',foreign key (user_id) references user(id)
) comment '抽奖设置';drop table if exists award;
create table award(id int primary key auto_increment,name varchar(20) not null comment '奖项名称',count int not null comment '奖项人数',award varchar(20) not null comment '奖品',setting_id int not null comment '抽奖设置id',create_time timestamp default NOW() comment '创建时间',foreign key (setting_id) references setting(id)
) comment '奖项';drop table if exists member;
create table member(id int primary key auto_increment,name varchar(20) not null comment '姓名',no varchar(20) not null comment '工号',setting_id int not null comment '抽奖设置id',create_time timestamp default NOW() comment '创建时间',foreign key (setting_id) references setting(id)
) comment '抽奖人员';drop table if exists record;
create table record(id int primary key auto_increment,member_id int not null comment '中奖人员id',award_id int not null comment '中奖奖项id',create_time timestamp default NOW() comment '创建时间',foreign key (member_id) references member(id),foreign key (award_id) references award(id)
) comment '中奖记录';

三、后端实现

五段代码只包含五个实体类从controller层到service层的调用
完整项目代码链接：Github

@RestController
@RequestMapping("/user")
public class UserController {@Autowiredprivate UserService userService;@PostMapping("/register")public Object register(User user, MultipartFile headFile){//保存上传的用户头像到服务端本地if(headFile != null) {String head = userService.saveHead(headFile);//上传的路径映射为http服务路径//用户头像的http路径设置到user.head，把user插入数据库user.setHead(head);}userService.register(user);return null;}@PostMapping("/login")public Object login(@RequestBody User user, HttpServletRequest req){//username, password//根据账号查用户User exist = userService.queryByUsername(user.getUsername());//用户不存在if(exist == null) throw new AppException("LOG001", "用户不存在");//用户存在，校验密码if(!user.getPassword().equals(exist.getPassword()))throw new AppException("LOG002", "账号或密码错误");//校验通过，保存数据库的用户(包含所有字段)到sessionHttpSession session = req.getSession();//先创建sessionsession.setAttribute("user", exist);return null;//登录成功}@GetMapping("/logout")public Object logout(HttpSession session){session.removeAttribute("user");return null;}
}@Service
public class UserService {@Autowiredprivate UserMapper userMapper;@Autowiredprivate SettingMapper settingMapper;private static final DateFormat DF = new SimpleDateFormat("yyyyMMdd");@Value("${user.head.local-path}")private String headLocalPath;@Value("${user.head.remote-path}")private String headRemotePath;public String saveHead(MultipartFile headFile) {//保存在本地路径//文件夹为当天：文件路径的间隔符和操作系统相关，可以使用File.separator，但是java也会根据操作系统自行设置Date now = new Date();String dirUri = "/"+DF.format(now);//20210203File dir = new File(headLocalPath+dirUri);if(!dir.exists()) dir.mkdirs();//保存在本地以天为单位的文件夹，保证文件唯一：随机字符串作为文件名，但是后缀还需要保留String suffix = headFile.getOriginalFilename().substring(headFile.getOriginalFilename().lastIndexOf("."));String headName = UUID.randomUUID().toString()+suffix;String uri = dirUri+"/"+headName;try {headFile.transferTo(new File(headLocalPath+uri));} catch (IOException e) {throw new AppException("REG001", "上传用户头像出错");}return headRemotePath+uri;}//事务处理：多个更新必须，有部分查询+更新有时候也需要//内部实现：aop，方法前加入开启事务逻辑，方法执行后，抛异常rollback，没有异常commit//禁止使用try catch吃异常@Transactional//可以手动指定隔离级别和传播特性public void register(User user) {//数据库校验：校验用户名不能重复，省略，自行扩展//插入user数据：插入后自增主键会按照useGeneratedKeys=true设置到对象属性int n = userMapper.insertSelective(user);//插入setting数据：登录后，进入设置页面，添加奖项和抽奖人员，需要setting_idSetting setting = new Setting();setting.setUserId(user.getId());setting.setBatchNumber(8);//每次抽奖的数量：设置一个默认值（业务决定）settingMapper.insertSelective(setting);}public User queryByUsername(String username) {return userMapper.selectByUsername(username);}
}

@RestController
@RequestMapping("/setting")
public class SettingController {@Autowiredprivate SettingService settingService;@Autowiredprivate AwardService awardService;@Autowiredprivate MemberService memberService;/*** 进入抽奖设置页面，初始化的接口，返回页面所有需要的数据：* setting对象中的属性：batchNumber* setting对象目前没有的属性：* （1）user（用户信息）* （2）awards(奖项列表：根据setting_id查)* （3）members（抽奖人员列表：根据setting_id查）*/@GetMapping("/query")public Object query(HttpSession session){//已经登录，所以可以直接使用HttpSession//获取session中的userUser user = (User) session.getAttribute("user");//根据userid查setting信息Setting setting = settingService.queryByUserId(user.getId());//把user设置到setting新增属性user中setting.setUser(user);//根据setting_id查award列表，设置到setting新增属性awards中List<Award> awards = awardService.queryBySettingId(setting.getId());setting.setAwards(awards);//根据setting_id查member列表，设置到setting新增属性members中List<Member> members = memberService.queryBySettingId(setting.getId());setting.setMembers(members);return setting;}@GetMapping("/update")public Object update(Integer batchNumber, HttpSession session){User user = (User) session.getAttribute("user");int n = settingService.update(batchNumber, user.getId());return null;}
}@Service
public class SettingService {@Autowiredprivate SettingMapper settingMapper;public Setting queryByUserId(Integer id) {return settingMapper.selectByUserId(id);}public int update(Integer batchNumber, Integer userId) {return settingMapper.update(batchNumber, userId);}
}

@RestController
@RequestMapping("/award")
public class AwardController {@Autowiredprivate AwardService awardService;@PostMapping("/add")public Object add(@RequestBody Award award, HttpSession session){User user = (User) session.getAttribute("user");int n = awardService.add(award, user.getId());return award.getId();//插入后，返回给前端自增主键id}@PostMapping("/update")public Object update(@RequestBody Award award){int n = awardService.update(award);return null;}@GetMapping("/delete/{id}")public Object delete(@PathVariable Integer id){int n = awardService.delete(id);return null;}
}@Service
public class AwardService {@Autowiredprivate AwardMapper awardMapper;@Autowiredprivate SettingMapper settingMapper;public List<Award> queryBySettingId(Integer id) {return awardMapper.selectBySettingId(id);}public int add(Award award, Integer userId) {//通过userId找settingId: 可以调用已有的selectByUserIdInteger settingId = settingMapper.queryIdByUserId(userId);//设置award中settingId属性award.setSettingId(settingId);//插入一条award数据/对象return awardMapper.insertSelective(award);}public int update(Award award) {return awardMapper.updateByPrimaryKeySelective(award);}public int delete(Integer id) {return awardMapper.deleteByPrimaryKey(id);}
}

@RestController
@RequestMapping("/member")
public class MemberController {@Autowiredprivate MemberService memberService;@PostMapping("/add")public Object add(@RequestBody Member member, HttpSession session){User user = (User) session.getAttribute("user");int n = memberService.add(member, user.getId());return member.getId();}@PostMapping("/update")public Object update(@RequestBody Member member){int n = memberService.update(member);return null;}@GetMapping("/delete/{id}")public Object delete(@PathVariable Integer id){int n = memberService.delete(id);return null;}
}@Service
public class MemberService {@Autowiredprivate MemberMapper memberMapper;@Autowiredprivate SettingMapper settingMapper;public List<Member> queryBySettingId(Integer id) {return memberMapper.selectBySettingId(id);}public int add(Member member, Integer userId) {Integer settingId = settingMapper.queryIdByUserId(userId);member.setSettingId(settingId);return memberMapper.insertSelective(member);}public int update(Member member) {return memberMapper.updateByPrimaryKeySelective(member);}public int delete(Integer id) {return memberMapper.deleteByPrimaryKey(id);}
}

@RestController
@RequestMapping("/record")
public class RecordController {@Autowiredprivate RecordService recordService;//抽奖：某个奖项下抽奖，一次抽多个人（插入多条抽奖记录）@PostMapping("/add/{awardId}")public Object add(@RequestBody List<Integer> memberIds, @PathVariable Integer awardId){int n = recordService.add(memberIds, awardId);return null;}@GetMapping("/delete/member")public Object deleteByMemberId(Integer id){int n = recordService.deleteByMemberId(id);return null;}@GetMapping("/delete/award")public Object deleteByAwardId(Integer id){int n = recordService.deleteByAwardId(id);return null;}@GetMapping("/delete/setting")public Object deleteBySetting(HttpSession session){User user = (User) session.getAttribute("user");//获取userid--->关联setting_id---->关联member_id, award_id//--->删除关联recordint n = recordService.deleteByUserId(user.getId());return null;}
}@Service
public class RecordService {@Autowiredprivate RecordMapper recordMapper;//批量插入抽奖记录public int add(List<Integer> memberIds, Integer awardId) {return recordMapper.batchInsert(memberIds, awardId);}public int deleteByMemberId(Integer memberId) {return recordMapper.deleteByMemberId(memberId);}public int deleteByAwardId(Integer id) {return recordMapper.deleteByAwardId(id);}public int deleteByUserId(Integer id) {return recordMapper.deleteByUserId(id);}
}

四、项目运行结果

注册界面

登陆界面

抽奖设置

人员设置

抽奖界面

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