天氣預報微服務 | 從0開始構建SpringCloud微服務(8)

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爲四個微服務：城市數據API微服務，天氣數據採集微服務，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。

天氣預報微服務的實現

配置pom文件

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

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>



    <groupId>com.demo</groupId>

    <artifactId>sifoudemo02</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>jar</packaging>



    <name>sifoudemo02</name>

    <description>Demo project for Spring Boot</description>



    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.0.5.RELEASE</version>

        <relativePath/> <!-- lookup parent from repository -->

    </parent>



    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <java.version>1.8</java.version>

    </properties>



    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-devtools</artifactId>

            <optional>true</optional>

        </dependency>

     

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>



        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        

        <dependency>

            <groupId>org.slf4j</groupId>

            <artifactId>slf4j-jdk14</artifactId>

            <version>1.7.7</version>

        </dependency>    

        

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-thymeleaf</artifactId>

        </dependency>

        

    </dependencies>



    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

                <configuration>

                    <fork>true</fork>

                </configuration>

                <!-- <groupId>org.apache.felix</groupId>

                <artifactId>maven-bundle-plugin</artifactId>

                <extensions>true</extensions> -->

            </plugin>

        </plugins>

    </build> 

</project>

提供接口

在Service中提供根據城市Id獲取天氣數據的方法。這裏的天氣數據後期將會由天氣數據API尾服務從緩存中獲取。

@Service
public class WeatherReportServiceImpl implements WeatherReportService {
    
    @Override
    public Weather getDataByCityId(String cityId) {
        // TODO 改爲由天氣數據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<Forecast> 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並進行前端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 改爲由城市數據API微服務來提供數據
        List<City> cityList = null;
        
        try {
            
            // TODO 改爲由城市數據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);
    }

}