天气预报微服务 | 从0开始构建SpringCloud微服务(8)

摘要：本章主要讲解天气预报微服务的实现。获取城市列表改为由城市数据微服务来提供数据改为由城市数据微服务提供数据深圳猪猪的天气预报

照例附上项目github链接

本项目实现的是将一个简单的天气预报系统一步一步改造成一个SpringCloud微服务系统的过程，本节主要讲的是单块架构改造成微服务架构的过程，最终将原来单块架构的天气预报服务拆分为四个微服务：城市数据API微服务，天气数据采集微服务，天气数据API微服务，天气预报微服务。

本章主要讲解天气预报微服务的实现。

对原来单块架构的天气预报服务进行改进，去除多余的依赖，最终的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中提供根据城市Id获取天气数据的方法。这里的天气数据后期将会由天气数据API尾服务从缓存中获取。

@Service
public class WeatherReportServiceImpl implements WeatherReportService {
    
    @Override
    public Weather getDataByCityId(String cityId) {
        // TODO 改为由天气数据API微服务来提供
        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("无风");
        forecast.setHigh("高温 11度");
        forecast.setLow("低温 1度");
        forecastList.add(forecast);
        
        forecast = new Forecast();
        forecast.setDate("26日星期天");
        forecast.setType("晴");
        forecast.setFengxiang("无风");
        forecast.setHigh("高温 11度");
        forecast.setLow("低温 1度");
        forecastList.add(forecast);
        
        forecast = new Forecast();
        forecast.setDate("27日星期天");
        forecast.setType("晴");
        forecast.setFengxiang("无风");
        forecast.setHigh("高温 11度");
        forecast.setLow("低温 1度");
        forecastList.add(forecast);
        
        forecast = new Forecast();
        forecast.setDate("28日星期天");
        forecast.setType("晴");
        forecast.setFengxiang("无风");
        forecast.setHigh("高温 11度");
        forecast.setLow("低温 1度");
        forecastList.add(forecast);
        
        forecast = new Forecast();
        forecast.setDate("29日星期天");
        forecast.setType("晴");
        forecast.setFengxiang("无风");
        forecast.setHigh("高温 11度");
        forecast.setLow("低温 1度");
        forecastList.add(forecast);
        
        data.setForecast(forecastList);
        return data;
    }

}

在Controller中提供根据城市Id获取相关天气预报数据并进行前端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 {
        // 获取城市ID列表
        // TODO 改为由城市数据API微服务来提供数据
        List cityList = null;
        
        try {
            
            // TODO 改为由城市数据API微服务提供数据
            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", "猪猪的天气预报");
        model.addAttribute("cityId", cityId);
        model.addAttribute("cityList", cityList);
        model.addAttribute("report", weatherReportService.getDataByCityId(cityId));
        return new ModelAndView("weather/report", "reportModel", model);
    }

}