spring mvc中restcontroller的套路

最新推荐文章于 2025-05-08 09:35:27 发布

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本文介绍了一个基于HTTP的天气查询接口的设计与实现方案，包括定义Java类WeatherResponse用于封装返回的数据，实现WeatherDataService接口以提供根据城市ID或城市名称获取天气信息的功能。

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public class WeatherResponse implements Serializable {

    private static final long serialVersionUID = 1L;

    private Weather data; // 消息数据
    private String status; // 消息状态
    private String desc; // 消息描述

    public Weather getData() {
        return data;
    }

    public void setData(Weather data) {
        this.data = data;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

}

接口：


public interface WeatherDataService {

    /**
     * 根据城市ID查询天气数据
     * @param cityId
     * @return
     */
    WeatherResponse getDataByCityId(String cityId);

    /**
     * 根据城市名称查询天气数据
     * @param cityId
     * @return
     */
    WeatherResponse getDataByCityName(String cityName);
}

实现：


@Service
public class WeatherDataServiceImpl implements WeatherDataService {

    @Autowired
    private RestTemplate restTemplate;

    private final String WEATHER_API = "http://wthrcdn.etouch.cn/weather_mini";

    @Override
    public WeatherResponse getDataByCityId(String cityId) {
        String uri = WEATHER_API + "?citykey=" + cityId;
        return this.doGetWeatherData(uri);
    }

    @Override
    public WeatherResponse getDataByCityName(String cityName) {
        String uri = WEATHER_API + "?city=" + cityName;
        return this.doGetWeatherData(uri);
    }

    private WeatherResponse doGetWeatherData(String uri) {
        ResponseEntity<String> response = restTemplate.getForEntity(uri, String.class);
        String strBody = null;

        if (response.getStatusCodeValue() == 200) {
            strBody = response.getBody();
        }

        ObjectMapper mapper = new ObjectMapper();
        WeatherResponse weather = null;

        try {
            weather = mapper.readValue(strBody, WeatherResponse.class);
        } catch (IOException e) {
            e.printStackTrace();
        }

        return weather;
    }

}

控制器：


@RestController
@RequestMapping("/weather") 
public class WeatherController {

    @Autowired
    private WeatherDataService weatherDataService;

    @GetMapping("/cityId/{cityId}")
    public WeatherResponse getReportByCityId(@PathVariable("cityId") String cityId) {
        return weatherDataService.getDataByCityId(cityId);
    }

    @GetMapping("/cityName/{cityName}")
    public WeatherResponse getReportByCityName(@PathVariable("cityName") String cityName) {
        return weatherDataService.getDataByCityName(cityName);
    }

}