<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- ip2region Starter -->
   <dependency>
	    <groupId>org.lionsoul</groupId>
	    <artifactId>ip2region</artifactId>
	    <version>2.7.0</version>
	</dependency>
	<!-- hutool工具類 -->
    <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>5.8.16</version>
    </dependency>

import cn.hutool.core.io.IoUtil;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.lionsoul.ip2region.xdb.Searcher;
import org.springframework.core.io.ClassPathResource;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.io.InputStream;

@Slf4j
@Service
public class IpService {

    private Searcher searcher;

    public IpService(){
        // 加載IP數(shù)據(jù)庫
        ClassPathResource resource = new ClassPathResource("ip2region/ip2region.xdb");
        try {
            InputStream inputStream = resource.getInputStream();
            searcher =  Searcher.newWithBuffer(IoUtil.readBytes(inputStream));
        } catch (IOException e) {
            log.error("解析ip地址失敗,無法創(chuàng)建搜索器: {}", e);
            throw new RuntimeException(e);
        }
    }

    @SneakyThrows
    public String getRegion(String ip) {
        String search = searcher.search(ip);
        return search;
    }
}

import jakarta.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * @Author 李懷明
 * @Date 2024/8/12 11:38 AM
 * @Version 1.0
 */
@RestController
@RequestMapping("/api/ip")
public class IpController {

    @Autowired
    private IpService ipService;

    @GetMapping("/location")
    public String getLocation(@RequestParam(value = "ip", required = false) String ip, HttpServletRequest request) {
        if (ip == null || ip.isEmpty()) {
            ip = getIPAddress(request);
        }
        return ipService.getRegion(ip);
    }

    /**
     * IP獲取處理 （可以抽離出來成為自己的工具類）
     * @param request
     * @return
     */
    private static String getIPAddress(HttpServletRequest request) {
        String ipAddress = request.getHeader("X-Forwarded-For");
        if (ipAddress == null || ipAddress.isEmpty() || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.isEmpty() || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.isEmpty() || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ipAddress == null || ipAddress.isEmpty() || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ipAddress == null || ipAddress.isEmpty() || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getRemoteAddr();
        }
        return "0:0:0:0:0:0:0:1".equals(ipAddress) ? "127.0.0.1" : ipAddress;
    }
}

http://localhost:8080/api/ip/location?ip=124.240.3.206