Question

我正在制作一个Java文件，您在其中输入国家，然后它向您显示该国家的covid-19信息。我正在使用的网站是https://covid19.mathdro.id/api/countries/ 在这里，我希望用户输入国家名称，并将国家名称添加到网站，例如，如果用户输入印度，则应这样做 https://covid19.mathdro.id/api/countries/India

任何帮助都是必要的，谢谢

Answer 1

您可以使用Retrofit来调用API

import okhttp3.OkHttpClient;
import retrofit2.Call;
import retrofit2.GsonConverterFactory;
import retrofit2.Retrofit;
import retrofit2.Response;

public class Retrofit_Example {
  public static void main(String[] args) {
    OkHttpClient.Builder client = new OkHttpClient.Builder();
    Retrofit retrofit = new Retrofit.Builder().baseUrl("https://covid19.mathdro.id/")
        .addConverterFactory(GsonConverterFactory.create())
        .client(client.build())
        .build();

    Service service = retrofit.create(Service.class);
    Call<Response1> responseCall = service.getData("India");
    try {
      Response<Response1> response = responseCall.execute();
      Response1 apiResponse = response.body();
      System.out.println(apiResponse);
    } catch (Exception ex) {
      ex.printStackTrace();
    }

  }
}

您将必须首先根据api以及更新客户端的JSON响应创建POJO。 POJO响应

public class Response1 {

    private Confirmed confirmed;
    private Deaths deaths;
    private String lastUpdate;
    private Recovered recovered;

    public Confirmed getConfirmed() {
        return confirmed;
    }

    public void setConfirmed(Confirmed confirmed) {
        this.confirmed = confirmed;
    }

    public Deaths getDeaths() {
        return deaths;
    }

    public void setDeaths(Deaths deaths) {
        this.deaths = deaths;
    }

    public String getLastUpdate() {
        return lastUpdate;
    }

    public void setLastUpdate(String lastUpdate) {
        this.lastUpdate = lastUpdate;
    }

    public Recovered getRecovered() {
        return recovered;
    }

    public void setRecovered(Recovered recovered) {
        this.recovered = recovered;
    }

    @Override
    public String toString() {
        return "Response1{" +
            "confirmed=" + confirmed +
            ", deaths=" + deaths +
            ", lastUpdate='" + lastUpdate + '\'' +
            ", recovered=" + recovered +
            '}';
    }
}

public class Recovered {

    private String detail;
    private Long value;

    public String getDetail() {
        return detail;
    }

    public void setDetail(String detail) {
        this.detail = detail;
    }

    public Long getValue() {
        return value;
    }

    public void setValue(Long value) {
        this.value = value;
    }

    @Override
    public String toString() {
        return "Recovered{" +
            "detail='" + detail + '\'' +
            ", value=" + value +
            '}';
    }
}

public class Deaths {


    private String detail;        
    private Long value;

    public String getDetail() {
        return detail;
    }

    public void setDetail(String detail) {
        this.detail = detail;
    }

    public Long getValue() {
        return value;
    }

    public void setValue(Long value) {
        this.value = value;
    }

    @Override
    public String toString() {
        return "Deaths{" +
            "detail='" + detail + '\'' +
            ", value=" + value +
            '}';
    }
}

public class Confirmed {


    private String detail;

    private Long value;

    public String getDetail() {
        return detail;
    }

    public void setDetail(String detail) {
        this.detail = detail;
    }

    public Long getValue() {
        return value;
    }

    public void setValue(Long value) {
        this.value = value;
    }

    @Override
    public String toString() {
        return "Confirmed{" +
            "detail='" + detail + '\'' +
            ", value=" + value +
            '}';
    }
}

改造客户

public interface Service {
  @GET("/api/countries/{country}")
  public Call<Response1> getData(@Path("country")String country);
}

如何使用Java，JSON获取国家/地区的Covid信息

1 个答案: