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 + '\'' +
                '}';
    }
}