springboot实现成功调用天气预报

1.首先需要申请获取天气预报的API接口，可以通过官方网站进行申请。

2.在Spring Boot项目中，可以通过引入相关的HTTP客户端库，如Apache HttpClient或Spring RestTemplate来实现调用API接口。

3.通过配置相关的请求参数和请求头，发送HTTP请求获取天气预报数据。

4.使用JSON解析库，如Jackson或Gson，对获取的JSON格式数据进行解析，提取需要的天气信息，并进行展示。

5.可以根据具体需求，定时或手动触发更新天气预报数据，保证数据的准确性和及时性。

相关问题

springboot用HttpClient调用天气预报接口

以下是使用HttpClient调用天气预报接口的Spring Boot示例：

1. 添加HttpClient和Jackson依赖

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
</dependency>

2. 创建HttpClient实例

@Configuration
public class HttpClientConfig {

    @Bean
    public CloseableHttpClient httpClient() {
        return HttpClients.createDefault();
    }

    @Bean
    public HttpClientService httpClientService(CloseableHttpClient httpClient) {
        return new HttpClientService(httpClient);
    }
}

3. 创建HttpClientService类

public class HttpClientService {

    private final CloseableHttpClient httpClient;

    public HttpClientService(CloseableHttpClient httpClient) {
        this.httpClient = httpClient;
    }

    public String get(String url) throws IOException {
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response = httpClient.execute(httpGet);
        try {
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                return EntityUtils.toString(entity);
            }
        } finally {
            response.close();
        }
        return null;
    }
}

4. 创建Weather类

public class Weather {

    private String date;
    private String week;
    private String weather;
    private String temp;
    private String humidity;
    private String wind;

    // getter and setter
}

5. 创建WeatherService类

@Service
public class WeatherService {

    private final HttpClientService httpClientService;

    public WeatherService(HttpClientService httpClientService) {
        this.httpClientService = httpClientService;
    }

    public List<Weather> getWeather(String city) throws IOException {
        String url = "http://wthrcdn.etouch.cn/weather_mini?city=" + city;
        String json = httpClientService.get(url);
        ObjectMapper mapper = new ObjectMapper();
        JsonNode rootNode = mapper.readTree(json);
        JsonNode dataNode = rootNode.path("data");
        List<Weather> weatherList = new ArrayList<>();
        for (JsonNode node : dataNode.path("forecast")) {
            Weather weather = mapper.treeToValue(node, Weather.class);
            weatherList.add(weather);
        }
        return weatherList;
    }
}

6. 测试WeatherService

@RestController
public class WeatherController {

    private final WeatherService weatherService;

    public WeatherController(WeatherService weatherService) {
        this.weatherService = weatherService;
    }

    @GetMapping("/weather")
    public List<Weather> getWeather(@RequestParam String city) throws IOException {
        return weatherService.getWeather(city);
    }
}

现在，你可以通过访问http://localhost:8080/weather?city=北京来获取北京的天气预报信息。

springboot利用FeignClient调用天气预报接口代码

以下是使用Spring Boot和FeignClient调用天气预报接口的示例代码：

首先，在pom.xml文件中添加以下依赖：

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>

然后，在应用程序主类上添加@EnableFeignClients注解，启用FeignClient：

@SpringBootApplication
@EnableFeignClients
public class WeatherApplication {
    public static void main(String[] args) {
        SpringApplication.run(WeatherApplication.class, args);
    }
}

接下来，创建一个FeignClient接口来定义调用天气预报API的方法：

@FeignClient(name = "weather-api", url = "https://api.weather.com")
public interface WeatherApiClient {
    @GetMapping("/forecast")
    ResponseEntity<String> getForecast(@RequestParam("city") String city, @RequestParam("apiKey") String apiKey);
}

在这个接口上，使用了FeignClient注解来指定要调用的API的名称和URL。然后，定义了一个getForecast方法，它使用@GetMapping注解来指定调用API的HTTP方法和路径，并使用@RequestParam注解来指定必需的查询参数。这个方法返回一个ResponseEntity<String>，其中包含API响应的主体。

最后，在需要调用天气预报API的代码中，注入WeatherApiClient接口，并调用getForecast方法：

@RestController
public class WeatherController {
    @Autowired
    private WeatherApiClient weatherApiClient;

    @GetMapping("/weather")
    public ResponseEntity<String> getWeather(@RequestParam("city") String city, @RequestParam("apiKey") String apiKey) {
        return weatherApiClient.getForecast(city, apiKey);
    }
}

在这个控制器中，注入了WeatherApiClient接口，并在getWeather方法中调用了getForecast方法来获取天气预报数据。这个方法返回了一个ResponseEntity<String>，它包含了API响应的主体。