java IP归属地功能实现详解

@RestController
public class IpController {
    @RequestMapping("/getIp")
    public String hello(httpservletRequest request) {
        String ip = request.getRemoteAddr();
        System.out.println(ip);
        return ip;
    }
}

public static String getIp(HttpServletRequest request) {
    String ip = request.getHeader("x-forwarded-for");
    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
        ip = request.getRemoteAddr();
    } else if (ip.length() > 15) {
        //多次反向代理后会有多个ip值，第一个ip才是真实ip
        String[] ips = ip.split(",");
        for (int index = 0; index < ips.length; index++) {
            String strIp = ips[index];
            ip = strIp;
            break;
        }
    }
    return ip;
}

public static void main(String[] args) {
    IpAddrInfo IpAddrInfo = IPAddr.getInstance().putLocInfo("114.103.71.226");
    System.out.println(JSONObject.tojsONString(IpAddrInfo));
}
public IpAddrInfo putLocInfo(String ip) {
    IpAddrInfo info = new IpAddrInfo();
    if (StringUtils.isNotBlank(ip)) {
        try {
            DistrictInfo addrInfo = db.findInfo(ip, "CN");
            info.setCity(addrInfo.getCityName());
            info.setCountry(addrInfo.getCountryName());
            info.setCountryCode(addrInfo.getChinaAdminCode());
            info.setIsp(addrInfo.getIsp());
            info.setLat(addrInfo.getLatitude());
            info.setLon(addrInfo.getLongitude());
            info.setProvince(addrInfo.getRegionName());
            info.setTimeZone(addrInfo.getTimeZone());
            System.out.println(addrInfo.toString());
        } catch (IPFORMatException e) {
            e.printStackTrace();
        } catch (InvalidDatabaseException e) {
            e.printStackTrace();
        }
    }
    return info;
}