因为公司最近要做一个ip查询经纬度在地图上显示的功能，而且有海外的ip，所以高德地图百度地图这些收费的api就暂时先不考虑了。
寻觅了良久，终于找了一个符合我们目前需求的在线api，官网地址：ip-api.com/docs/api:js…，还支持各种语言的返回结果哦
现在来写例子吧
pom.xml 加入httpclient,fastjson,lombok依赖
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.12</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.72</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.ParseException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
/**
* 通过ip定位地址，经纬度，城市，国家等
* api地址：https://ip-api.com/docs/api:json
*
* @author miao
*/
@Slf4j
public class IpUtil {
/**
* 发起https请求并获取结果
*
* @param requestUrl 请求地址
* @return JSONObject(通过JSONObject.get ( key)的方式获取json对象的属性值)
*/
public static JSONObject doGetRequest(String requestUrl) {
//1.获得一个httpclient对象
CloseableHttpClient httpclient = HttpClients.createDefault();
//2.生成一个get请求
HttpGet httpget = new HttpGet(requestUrl);
CloseableHttpResponse response = null;
try {
//3.执行get请求并返回结果
response = httpclient.execute(httpget);
} catch (IOException e1) {
log.info("请求：{}时出错", requestUrl);
}
String result = null;
try {
//4.处理结果，这里将结果返回为字符串
HttpEntity entity = response.getEntity();
if (entity != null) {
result = EntityUtils.toString(entity);
}
} catch (ParseException | IOException e) {
log.info("处理请求结果出错");
} finally {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return JSON.parseObject(result);
}
public static void main(String[] args) {
String requestUrl = "http://ip-api.com/json/103.29.66.52?lang=zh-CN";
System.out.println(IpUtil.doGetRequest(requestUrl));
}
}
