How can SpringBoot obtain geographic location informati…

Spring Boot itself does not have a built-in function for obtaining geographic location information, but it can utilize third-party location services to achieve this.

One common method is to obtain geographical location information through IP addresses. Third-party IP address databases, such as Taobao IP address database (https://ip.taobao.com/) or AMap IP address database (https://lbs.amap.com/), can be used to retrieve geographical location information corresponding to IP addresses.

Here is an example of using the Taobao IP address database to obtain geographical location information:

1. Add Maven dependency:

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.62</version>
</dependency>

1. Create a utility class for sending HTTP requests and parsing responses.

import com.alibaba.fastjson.JSONObject;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

public class IPUtils {
    public static String getCityByIP(String ip) {
        String url = "https://ip.taobao.com/outGetIpInfo?ip=" + ip + "&accessKey=alibaba-inc";
        RestTemplate restTemplate = new RestTemplate();
        ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.GET, null, String.class);
        String responseBody = response.getBody();
        JSONObject json = JSONObject.parseObject(responseBody);
        JSONObject data = json.getJSONObject("data");
        return data.getString("city");
    }
}

1. Use this utility class in Spring Boot to obtain geographical location information.

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class LocationController {
    @GetMapping("/location/{ip}")
    public String getLocation(@PathVariable String ip) {
        String city = IPUtils.getCityByIP(ip);
        return "IP地址 " + ip + " 对应的城市是 " + city;
    }
}

In this way, when accessing the /location/{ip} endpoint, it will return the geographic location information of the corresponding IP address.

Of course, there are other ways to obtain location information, such as using GPS positioning, accessing location through a browser, etc. The specific implementation should be determined based on actual needs and the third-party services used.