海南旅游景点推荐系统 毕业设计 JAVA+Vue+SpringBoot+MySQL

https://gf.bilibili.com/item/detail/1104039029

@RequestMapping(value = "/getRecommendList2OnWeb", method = RequestMethod.GET)
@ApiOperation(value = "查询推荐的景点")
public Result<List<ScenicSpot>> getRecommendList2(){
    List<ScenicSpot> spotList = iScenicSpotService.list();
    int[] arr = new int[spotList.size()];
    for(int i = 1; i < spotList.size(); i ++) {
        arr[i - 1] = i;
    }
    int[] ints = selectM(arr, 10);
    List<ScenicSpot> ans = new ArrayList<>();
    for (int i : ints) {
        ans.add(spotList.get(i));
    }
    return new ResultUtil<List<ScenicSpot>>().setData(ans);
}
public static int[] selectM(int[] arr,int m){
    int len=arr.length;
    if(m>arr.length) {
        throw new RuntimeException("xxxxx");
    }
    int[] res=new int[m];
    for(int i=0;i<m;i++){
        int randomIndex=len-1-new Random().nextInt(len-i);
        res[i]=arr[randomIndex];
        int tmp=arr[randomIndex];
        arr[randomIndex]=arr[i];
        arr[i]=tmp;
    }
    return res;
}

@RequestMapping(value = "/addEvaluate", method = RequestMethod.GET)
@ApiOperation(value = "新增评价")
public Result<Evaluate> addEvaluate(@RequestParam String id, @RequestParam BigDecimal level, @RequestParam String message){
    ScenicSpot ss = iScenicSpotService.getById(id);
    if(ss == null) {
        return ResultUtil.error("景点不存在");
    }
    User currUser = securityUtil.getCurrUser();
    QueryWrapper<Evaluate> qw = new QueryWrapper<>();
    qw.eq("spot_id",ss.getId());
    qw.eq("user_id",currUser.getId());
    qw.last("limit 1");
    Evaluate evaluate = iEvaluateService.getOne(qw);
    if(evaluate == null) {
        evaluate = new Evaluate();
        evaluate.setSpotId(ss.getId());
        evaluate.setSpotName(ss.getTitle());
        evaluate.setUserId(currUser.getId());
        evaluate.setUserName(currUser.getNickname());
    }
    evaluate.setLevel(level);
    evaluate.setMessage(message);
    evaluate.setTime(DateUtil.now());
    iEvaluateService.saveOrUpdate(evaluate);
    return ResultUtil.success();
}

@Scheduled(cron = "0 0/1 * * * ?")
@ApiOperation(value = "景点数据更新")
public void job(){
    List<ScenicSpot> spotList = iScenicSpotService.list();
    for (ScenicSpot vo : spotList) {
        Long evaluateSum = 0L;
        QueryWrapper<Evaluate> evalQw = new QueryWrapper<>();
        evalQw.eq("spot_id",vo.getId());
        List<Evaluate> evaluateList = iEvaluateService.list(evalQw);
        for (Evaluate evaluate : evaluateList) {
            evaluateSum += evaluate.getLevel().longValue();
        }
        // 收藏 10分
        QueryWrapper<Collection> coQw = new QueryWrapper<>();
        coQw.eq("spot_id",vo.getId());
        evaluateSum += iCollectionService.count(coQw);
        // 浏览 1分
        String viewStr = redisTemplate.get("SPOT_VIEW:" + vo.getId());
        if(!ZwzNullUtils.isNull(viewStr)) {
            try {
                long viewNumber = Long.parseLong(viewStr);
                evaluateSum += viewNumber;
            } catch (Exception e) {}
        }
        vo.setValue(evaluateSum);
    }
    Collections.sort(spotList, new Comparator<ScenicSpot>() {
        @Override
        public int compare(ScenicSpot o1, ScenicSpot o2) {
            return (int)(o2.getValue() - o1.getValue());
        }
    });
    if(spotList.size() > 10) {
        spotList = spotList.subList(0,10);
    }
    for (ScenicSpot vo1 : spotList) {
        // 评分
        BigDecimal evaluateSum = BigDecimal.ZERO;
        QueryWrapper<Evaluate> evalQw = new QueryWrapper<>();
        evalQw.eq("spot_id",vo1.getId());
        List<Evaluate> evaluateList = iEvaluateService.list(evalQw);
        for (Evaluate evaluate : evaluateList) {
            evaluateSum = evaluateSum.add(evaluate.getLevel());
        }
        if(evaluateList.size() > 0) {
            vo1.setStar(evaluateSum.divide(BigDecimal.valueOf(evaluateList.size()),2, RoundingMode.DOWN));
        } else {
            vo1.setStar(BigDecimal.valueOf(-1));
        }
        // 收藏
        QueryWrapper<Collection> coQw = new QueryWrapper<>();
        coQw.eq("spot_id",vo1.getId());
        vo1.setCollection(iCollectionService.count(coQw));
    }
    redisTemplate.set("SPOT_JOB_DATA", JSON.toJSONString(spotList));
    System.out.println("缓存完毕！");
}

@RequestMapping(value = "/loginOnWeb", method = RequestMethod.GET)
@ApiOperation(value = "网站前台登陆")
public Result<String> loginOnWeb(@RequestParam String userName, @RequestParam String password){
    QueryWrapper<User> qw = new QueryWrapper<>();
    qw.eq("username",userName);
    List<User> userList = iUserService.list(qw);
    if(userList.size() < 1) {
        return ResultUtil.error("用户不存在");
    }
    User user = userList.get(0);
    if(!new BCryptPasswordEncoder().matches(password, user.getPassword())){
        return ResultUtil.error("密码不正确");
    }
    String accessToken = securityUtil.getToken(user.getUsername(), true);
    UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(new SecurityUserDetails(user), null, null);
    SecurityContextHolder.getContext().setAuthentication(authentication);
    return new ResultUtil<String>().setData(accessToken);
}

@RequestMapping(value = "/getByPage", method = RequestMethod.GET)
@ApiOperation(value = "查询美食")
public Result<IPage<DeliciousFood>> getByPage(@ModelAttribute DeliciousFood deliciousFood ,@ModelAttribute PageVo page){
    QueryWrapper<DeliciousFood> qw = new QueryWrapper<>();
    if(!ZwzNullUtils.isNull(deliciousFood.getTitle())) {
        qw.like("title",deliciousFood.getTitle());
    }
    if(!ZwzNullUtils.isNull(deliciousFood.getContent())) {
        qw.like("content",deliciousFood.getContent());
    }
    if(!ZwzNullUtils.isNull(deliciousFood.getSpotId())) {
        qw.eq("spot_id",deliciousFood.getSpotId());
    }
    IPage<DeliciousFood> data = iDeliciousFoodService.page(PageUtil.initMpPage(page),qw);
    return new ResultUtil<IPage<DeliciousFood>>().setData(data);
}