调用百度api获取经纬度
本文记录调用百度API获取经纬度使用记录，包含2个，一个是获取某个地点的经纬度信息，一个是以某个经纬度为中心点，查询方圆内的坐标。
百度API地址：http://lbsyun.baidu.com/index.php?title=webapi/guide/webservice-placeapi
一.获取某个地点的经纬度信息
工具类：
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RestController;
import java.io.IOException;
import java.math.BigDecimal;
import java.net.URISyntaxException;
@RestController
public class ApiInvoker {
static class Position {
BigDecimal lat;
BigDecimal lng;
Position(BigDecimal lat, BigDecimal lng) {
this.lat = lat;
this.lng = lng;
}
public String toString() {
return lng + "," + lat;
}
}
public static String getPositionXY(String keyword, String boundary) throws IOException, URISyntaxException {
JSONObject result = ApiInvoker.callApi(keyword, boundary);
if (result != null) {
Position position = getPostion(result);
if (position != null) {
System.out.println("position : " + position.lng + "," + position.lat);
return position.lng + "," + position.lat;
}else {
System.out.println("解析坐标失败");
return null;
}
}
return null;
}
public static Position getPostion(JSONObject object) {
if (object == null) return null;
JSONArray array = (JSONArray) object.get("results");
if (array == null || array.size() < 1) return null;
JSONObject location = null;
location = (JSONObject) ((JSONObject)array.get(0)).get("location");
if (location == null) return null;
try {
return new Position((BigDecimal)location.get("lat"), (BigDecimal)location.get("lng"));
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
*
* @param keyword 检索关键字
* @param boundary 检索行政区划区域
* @return
* @throws IOException
* @throws URISyntaxException
*/
public static JSONObject callApi(String keyword, String boundary) throws IOException, URISyntaxException {
HttpClient client = HttpClients.createDefault();
URIBuilder uriBuilder = new URIBuilder("http://api.map.baidu.com/place/v2/search");
uriBuilder.setParameter("query", keyword)
.setParameter("region", boundary)
.setParameter("output", "json")
.setParameter("ak", "nPQRbkNFGmz05mAwVn16gsM24VSV6mh7");
HttpGet httpGet = new HttpGet(uriBuilder.build());
HttpEntity entity = null;
try {
HttpResponse response = client.execute(httpGet);
entity = response.getEntity();
} catch (IOException e) {
System.out.println("调用失败");
}
if (entity != null) {
String jsonString = EntityUtils.toString(entity, "utf-8");
if (!StringUtils.isEmpty(jsonString))
return JSON.parseObject(jsonString);
}
return null;
}
public static String buildBoundary(String area1, String area2) {
StringBuilder sb = new StringBuilder("region(");
sb.append(area1);
sb.append(area2);
sb.append(",0)");
return sb.toString();
}
}
二.以某个经纬度为中心点，查询方圆内的坐标
工具类：
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RestController;
import java.io.IOException;
import java.math.BigDecimal;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
/**
* 百度api获取范围地址
*/
@RestController
public class ApiNearInvoker {
private Logger log = LoggerFactory.getLogger(this.getClass());
public static void main(String[] args) throws IOException, URISyntaxException {
List<Position> postion = ApiNearInvoker.callApi("餐厅", "27.535303,109.950842", "20000");
if (null != postion || postion.size() < 1)
for (Position position : postion) {
String s = position.toString();
System.out.println(s);
}
else
System.out.println("解析坐标失败");
}
public static List<Position> getPostion(JSONObject object) {
if (object == null) return null;
JSONArray array = (JSONArray) object.get("results");
if (array == null || array.size() < 1) return null;
List<Position> list = new ArrayList<>();
try {
JSONObject location = null;
Position position = null;
for (Object o : array) {
position = new Position();
JSONObject json = (JSONObject) o;
location = (JSONObject) json.get("location");
position.setLat((BigDecimal) location.get("lat"));
position.setLng((BigDecimal) location.get("lng"));
position.setAddress((String) json.get("address"));
position.setCity((String) json.get("city"));
position.setArea((String) json.get("area"));
position.setProvince((String) json.get("province"));
position.setTelephone((String) json.get("telephone"));
position.setName((String) json.get("name"));
list.add(position);
}
return list;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
*
* @param query 查询名字：餐厅，饭店。。。
* @param location 中心点坐标：纬度，经度
* @param radius 方圆，单位米
* @return
* @throws IOException
* @throws URISyntaxException
*/
public static List<Position> callApi(String query, String location, String radius) throws IOException, URISyntaxException {
HttpClient client = HttpClients.createDefault();
URIBuilder uriBuilder = new URIBuilder("http://api.map.baidu.com/place/v2/search");
uriBuilder.setParameter("query", query)
.setParameter("location", location)
.setParameter("radius", radius)
.setParameter("output", "json")
.setParameter("ak", "nPQRbkNFGmz05mAwVn16gsM24VSV6mh7");
HttpGet httpGet = new HttpGet(uriBuilder.build());
HttpEntity entity = null;
try {
HttpResponse response = client.execute(httpGet);
entity = response.getEntity();
} catch (IOException e) {
// log.info("调用失败", e);
System.out.println("调用失败:" + e);
}
if (entity != null) {
String jsonString = EntityUtils.toString(entity, "utf-8");
if (!StringUtils.isEmpty(jsonString)) {
JSONObject jsonObject = JSON.parseObject(jsonString);
if (jsonObject != null) {
List<Position> postion = getPostion(jsonObject);
return postion;
}
}
}
return null;
}
}
实体类：
import java.math.BigDecimal;
public class Position {
BigDecimal lat;
BigDecimal lng;
String area;
String address;
String province;
String city;
String name;
String telephone;
Position(){
}
Position(BigDecimal lat, BigDecimal lng,String area,String address,String province,String city,String name,String telephone) {
this.lat = lat;
this.lng = lng;
this.area=area;
this.address=address;
this.province=province;
this.city=city;
this.name=name;
this.telephone=telephone;
}
public BigDecimal getLat() {
return lat;
}
public void setLat(BigDecimal lat) {
this.lat = lat;
}
public BigDecimal getLng() {
return lng;
}
public void setLng(BigDecimal lng) {
this.lng = lng;
}
public String getArea() {
return area;
}
public void setArea(String area) {
this.area = area;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getProvince() {
return province;
}
public void setProvince(String province) {
this.province = province;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
@Override
public String toString() {
return "Position{" +
"lat=" + lat +
", lng=" + lng +
", area='" + area + '\'' +
", address='" + address + '\'' +
", province='" + province + '\'' +
", city='" + city + '\'' +
", name='" + name + '\'' +
", telephone='" + telephone + '\'' +
'}';
}
}
