|  |  |  | 
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|  |  |  | //获取所有城市aqi小时数据 | 
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|  |  |  | QueryWrapper<CityAqi> wrapper = new QueryWrapper<>(); | 
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|  |  |  | wrapper.select("city_code", "time", "value") | 
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|  |  |  | .ge("time", DateUtils.dateToDateString(start)) | 
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|  |  |  | .lt("time", DateUtils.dateToDateString(end)); | 
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|  |  |  | .ge("time", start) | 
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|  |  |  | .lt("time", end); | 
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|  |  |  | List<Map<String, Object>> dailyData = cityAqiService.listMaps(wrapper); | 
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|  |  |  |  | 
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|  |  |  | if (dailyData.size() == 0) { | 
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|  |  |  | 
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|  |  |  | .collect(Collectors.groupingBy(o -> o.get("city_code").toString())); | 
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|  |  |  |  | 
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|  |  |  | List<CityAqiDaily> cityAqiDailies = new ArrayList<>(); | 
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|  |  |  | CityAqiDaily cityAqiDaily = new CityAqiDaily(); | 
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|  |  |  |  | 
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|  |  |  | data.forEach((cityCode, value) -> { | 
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|  |  |  | CityAqiDaily cityAqiDaily = new CityAqiDaily(); | 
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|  |  |  | Map<String, Object> jsonMap = new HashMap<>(); | 
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|  |  |  | cityAqiDaily.setCityCode(Integer.parseInt(cityCode)); | 
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|  |  |  | cityAqiDaily.setTime(start); | 
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