摘要：本章主要講解天氣預報微服務的實現。獲取城市列表改為由城市數據微服務來提供數據改為由城市數據微服務提供數據深圳豬豬的天氣預報

照例附上項目github鏈接

本項目實現的是將一個簡單的天氣預報系統一步一步改造成一個SpringCloud微服務系統的過程，本節主要講的是單塊架構改造成微服務架構的過程，最終將原來單塊架構的天氣預報服務拆分為四個微服務：城市數據API微服務，天氣數據采集微服務，天氣數據API微服務，天氣預報微服務。

本章主要講解天氣預報微服務的實現。

對原來單塊架構的天氣預報服務進行改進，去除多余的依賴，最終的pom文件如下：

    4.0.0



    com.demo

    sifoudemo02

    0.0.1-SNAPSHOT

    jar



    sifoudemo02

    Demo project for Spring Boot



    

        org.springframework.boot

        spring-boot-starter-parent

        2.0.5.RELEASE

         

    



    

        UTF-8

        UTF-8

        1.8

    



    

        

            org.springframework.boot

            spring-boot-devtools

            true

        

     

        

            org.springframework.boot

            spring-boot-starter-web

        



        

            org.springframework.boot

            spring-boot-starter-test

            test

        

        

        

            org.slf4j

            slf4j-jdk14

            1.7.7

            

        

        

            org.springframework.boot

            spring-boot-starter-thymeleaf

        

        

    



    

        

            

                org.springframework.boot

                spring-boot-maven-plugin

                

                    true

                

                

            

        

     

在Service中提供根據城市Id獲取天氣數據的方法。這里的天氣數據后期將會由天氣數據API尾服務從緩存中獲取。

@Service
public class WeatherReportServiceImpl implements WeatherReportService {
    
    @Override
    public Weather getDataByCityId(String cityId) {
        // TODO 改為由天氣數據API微服務來提供
        Weather data = new Weather();
        data.setAqi("81");
        data.setCity("深圳");
        data.setGanmao("容易感冒！多穿衣");
        data.setWendu("22");
        
        List forecastList = new ArrayList<>();
        
        Forecast forecast = new Forecast();
        forecast.setDate("25日星期天");
        forecast.setType("晴");
        forecast.setFengxiang("無風");
        forecast.setHigh("高溫 11度");
        forecast.setLow("低溫 1度");
        forecastList.add(forecast);
        
        forecast = new Forecast();
        forecast.setDate("26日星期天");
        forecast.setType("晴");
        forecast.setFengxiang("無風");
        forecast.setHigh("高溫 11度");
        forecast.setLow("低溫 1度");
        forecastList.add(forecast);
        
        forecast = new Forecast();
        forecast.setDate("27日星期天");
        forecast.setType("晴");
        forecast.setFengxiang("無風");
        forecast.setHigh("高溫 11度");
        forecast.setLow("低溫 1度");
        forecastList.add(forecast);
        
        forecast = new Forecast();
        forecast.setDate("28日星期天");
        forecast.setType("晴");
        forecast.setFengxiang("無風");
        forecast.setHigh("高溫 11度");
        forecast.setLow("低溫 1度");
        forecastList.add(forecast);
        
        forecast = new Forecast();
        forecast.setDate("29日星期天");
        forecast.setType("晴");
        forecast.setFengxiang("無風");
        forecast.setHigh("高溫 11度");
        forecast.setLow("低溫 1度");
        forecastList.add(forecast);
        
        data.setForecast(forecastList);
        return data;
    }

}

在Controller中提供根據城市Id獲取相關天氣預報數據并進行前端UI界面展示的接口。

@RestController
@RequestMapping("/report")
public class WeatherReportController {
    private final static Logger logger = LoggerFactory.getLogger(WeatherReportController.class);  

    @Autowired
    private WeatherReportService weatherReportService;
    
    @GetMapping("/cityId/{cityId}")
    public ModelAndView getReportByCityId(@PathVariable("cityId") String cityId, Model model) throws Exception {
        // 獲取城市ID列表
        // TODO 改為由城市數據API微服務來提供數據
        List cityList = null;
        
        try {
            
            // TODO 改為由城市數據API微服務提供數據
            cityList = new ArrayList<>();
            City city = new City();
            city.setCityId("101280601");
            city.setCityName("深圳");
            cityList.add(city);
            
        } catch (Exception e) {
            logger.error("Exception!", e);
        }
        
        model.addAttribute("title", "豬豬的天氣預報");
        model.addAttribute("cityId", cityId);
        model.addAttribute("cityList", cityList);
        model.addAttribute("report", weatherReportService.getDataByCityId(cityId));
        return new ModelAndView("weather/report", "reportModel", model);
    }

}