Cara menggunakan Java untuk melaksanakan fungsi kedudukan tapak sistem CMS

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class GeolocationHelper {
    private static final String GEOLOCATION_API_URL = "https://maps.googleapis.com/maps/api/geocode/xml";

    public static Geolocation getGeolocationByIPAddress(String ipAddress) throws IOException, JAXBException {
        String xmlResponse = sendHttpRequest(GEOLOCATION_API_URL + "?address=" + ipAddress);
        return parseGeolocationResponse(xmlResponse);
    }

    private static String sendHttpRequest(String url) throws IOException {
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        con.setRequestMethod("GET");

        int responseCode = con.getResponseCode();
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuilder response = new StringBuilder();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        return response.toString();
    }

    private static Geolocation parseGeolocationResponse(String xmlResponse) throws JAXBException {
        JAXBContext jaxbContext = JAXBContext.newInstance(Geolocation.class);
        Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
        return (Geolocation) jaxbUnmarshaller.unmarshal(new StringReader(xmlResponse));
    }
}

public class Site {
    private String name;
    private double longitude;
    private double latitude;

    // 省略构造方法和其他属性的getter和setter

    public double getDistanceFromDevice(Geolocation deviceGeolocation) {
        double deviceLatitude = deviceGeolocation.getLatitude();
        double deviceLongitude = deviceGeolocation.getLongitude();

        double lat1 = Math.toRadians(latitude);
        double lon1 = Math.toRadians(longitude);
        double lat2 = Math.toRadians(deviceLatitude);
        double lon2 = Math.toRadians(deviceLongitude);

        double dlon = lon2 - lon1;
        double dlat = lat2 - lat1;
        double a = Math.pow(Math.sin(dlat / 2), 2) +
                Math.cos(lat1) * Math.cos(lat2) *
                Math.pow(Math.sin(dlon / 2), 2);
        double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
        double distance = 6371 * c;

        return distance;
    }
}

public class CmsSystem {
    public static void main(String[] args) throws IOException, JAXBException {
        // 假设用户设备的IP地址为"192.168.0.100"
        String ipAddress = "192.168.0.100";

        // 获取用户设备的地理位置信息
        Geolocation deviceGeolocation = GeolocationHelper.getGeolocationByIPAddress(ipAddress);

        // 创建多个站点对象
        Site site1 = new Site("Site 1", 41.8919300, 12.5113300);
        Site site2 = new Site("Site 2", 40.712776, -74.005974);
        Site site3 = new Site("Site 3", 34.052235, -118.243683);

        // 计算每个站点与用户设备之间的距离
        double distanceFromSite1 = site1.getDistanceFromDevice(deviceGeolocation);
        double distanceFromSite2 = site2.getDistanceFromDevice(deviceGeolocation);
        double distanceFromSite3 = site3.getDistanceFromDevice(deviceGeolocation);

        // 根据距离选择最近的站点，并提供个性化服务
        if (distanceFromSite1 < distanceFromSite2 && distanceFromSite1 < distanceFromSite3) {
            System.out.println("欢迎访问 " + site1.getName() + "！");
        } else if (distanceFromSite2 < distanceFromSite1 && distanceFromSite2 < distanceFromSite3) {
            System.out.println("欢迎访问 " + site2.getName() + "！");
        } else {
            System.out.println("欢迎访问 " + site3.getName() + "！");
        }
    }
}