此工具类基于淘宝IP地址库提供的RESTAPI。
参考：科帮网

public class AddressUtils throws Exception {
    
    public static String getAddress(String ip) {
        // 调用淘宝IP地址库API
        String restApi = "http://ip.taobao.com/service/getIpInfo.php";

        String returnStr = getResult(restApi, ip);
        if (returnStr != null) {
            // 处理返回的省市区信息
            String[] temp = returnStr.split(",");
            
            // test 打印
            List<String> list = Arrays.asList(temp);
            list.forEach(str->System.out.println(str));
            
            String country = "";
            String area = "";
            String region = "";
            String city = "";
            String county = "";
            String isp = "";
            for (int i = 0; i < temp.length; i++) {
                switch (i) {
                case 2:
                    country = (temp[i].split(":"))[1].replaceAll("\"", "");// 国家
                    System.out.println("country:"+country);
                    break;
                case 3:
                    area = (temp[i].split(":"))[1].replaceAll("\"", "");// 地区
                    break;
                case 4:
                    region = (temp[i].split(":"))[1].replaceAll("\"", "");// 省份
                    System.out.println("region:"+region);
                    break;
                case 5:
                    city = (temp[i].split(":"))[1].replaceAll("\"", "");// 市区
                    break;
                case 6:
                    county = (temp[i].split(":"))[1].replaceAll("\"", "");// 县市
                    break;
                case 7:
                    isp = (temp[i].split(":"))[1].replaceAll("\"", ""); // ISP公司
                    break;
                default:
                    break;
                }
            }
            String address = region+city+isp;
            if(StringUtils.isBlank(address)){
                address = "泰坦星";
            }
            return address;
        }
        return null;
    }
    
    private static String getResult(String urlStr, String ip) {
        URL url = null;
        HttpURLConnection connection = null;
        try {
            url = new URL(urlStr);
            connection = (HttpURLConnection) url.openConnection();// 新建连接实例
            connection.setConnectTimeout(5000);// 设置连接超时时间，单位毫秒
            connection.setReadTimeout(5000);// 设置读取数据超时时间，单位毫秒
            connection.setDoOutput(true);// 是否打开输出流 true|false
            connection.setDoInput(true);// 是否打开输入流true|false
            connection.setRequestMethod("POST");// 提交方法POST|GET
            connection.setUseCaches(false);// 是否缓存true|false
            connection.connect();// 打开连接端口
            DataOutputStream out = new DataOutputStream(connection.getOutputStream());// 打开输出流往对端服务器写数据
            out.writeBytes("ip="+ip);// 写数据,也就是提交你的表单 name=xxx&pwd=xxx
            out.flush();// 刷新
            out.close();// 关闭输出流
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "utf-8"));// 往对端写完数据对端服务器返回数据
            // ,以BufferedReader流来读取
            StringBuffer buffer = new StringBuffer();
            String line = "";
            while ((line = reader.readLine()) != null) {
                buffer.append(line);
            }
            reader.close();
            return buffer.toString();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (connection != null) {
                connection.disconnect();// 关闭连接
            }
        }
        return null;
    }
}

测试调用情况：

public static void main(String[] args) {
        String ip = "111.75.200.41";
        String result = getAddress(ip);
        System.out.println(result);
    }

// 返回结果
/*
* {"code":0
* "data":{"ip":"111.75.200.41"
* "country":"中国"
* "area":""
* "region":"江西"
* "city":"南昌"
* "county":"XX"
* "isp":"电信"
* "country_id":"CN"
* "area_id":""
* "region_id":"360000"
* "city_id":"360100"
* "county_id":"xx"
* "isp_id":"100017"}}
* country:中国
* region:江西
* 江西南昌电信
*/