教你如何拔取百度地图POI兴趣点

通过聚合数据提供的接口，获取百度地图的POI兴趣点，并存储至数据库中。

实现：

1、聚合数据百度POI接口说明

调用聚合数据，首先得注册聚合。聚合数据提供的百度地图POI的接口有三个：数据分类，查询数据和获取周边数据。想要获取百度POI兴趣点，涉及到的接口为数据分类，查询数据。

a、数据分类

{
"resultcode":"200",
"reason":"Return Successd!",
"result":[
    {
    "id":"17",
    "name":"中式快餐",
    "fid":"1"
    },
    {
    "id":"18",
    "name":"中餐馆",
    "fid":"1"
    },
    {
    "id":"19",
    "name":"休闲餐饮",
    "fid":"1"
    },
    {
    "id":"20",
    "name":"日韩式料理",
    "fid":"1"
    },
    {
    "id":"21",
    "name":"西餐厅",
    "fid":"1"
    },
    {
    "id":"22",
    "name":"西式快餐",
    "fid":"1"
    },
    {
    "id":"33",
    "name":"东南亚菜",
    "fid":"1"
    }
]
}

b、查询数据

{
"resultcode":"200",
"reason":"Return Successd!",
"result":{
    "data":[
        {
            "id":"493567",
            "title":"生良饭店",
            "province":"上海市",
            "city":"上海市",
            "address":"上海市",
            "tags":"餐饮",
            "type1":"1",
            "type2":"0",
            "tag":"",
            "lng":"121.375458",
            "lat":"31.794554"
        },
        {
            "id":"493568",
            "title":"永兴饭店",
            "province":"上海市",
            "city":"上海市",
            "address":"上海市",
            "tags":"餐饮",
            "type1":"1",
            "type2":"0",
            "tag":"",
            "lng":"121.421982",
            "lat":"31.767340"
        },
        {
            "id":"493569",
            "title":"猛东饭店",
            "province":"上海市",
            "city":"上海市",
            "address":"庙镇镇合作社区竖星路210号",
            "tags":"餐饮",
            "type1":"1",
            "type2":"0",
            "tag":"小吃",
            "lng":"121.372307",
            "lat":"31.747095"
        },
        {
            "id":"493570",
            "title":"百顺酒家",
            "province":"上海市",
            "city":"上海市",
            "address":"宏海公路2010",
            "tags":"餐饮,中餐馆",
            "type1":"1",
            "type2":"18",
            "tag":"",
            "lng":"121.352936",
            "lat":"31.720875"
        },
        {
            "id":"493571",
            "title":"群丰酒楼",
            "province":"上海市",
            "city":"上海市",
            "address":"上海市",
            "tags":"餐饮",
            "type1":"1",
            "type2":"0",
            "tag":"",
            "lng":"121.354179",
            "lat":"31.720181"
        }
    ],
        "pageinfo":{
            "nums":93720,
            "pnums":"5",
            "current":"2",
            "pageall":18744
        }
    }
}

根据提供的接口，获取数据全部分类的地址为：

http://apis.juhe.cn/baidu/getCategory?key=您的key&dtype=json

为方便使用，我将返回的数据整理成了表格形式，如下：

3、获取POI

根据提供的接口，获取POI的地址为：

http://apis.juhe.cn/baidu/getData?key=您的key&dtype=json&city=北京市&page=1&cid=1

其中：

city：城市名称；

page：当前页；

cid：获取到的数据分类的id

为了能将获取到的数据保存下来，用java+oracle写了一段小程序，实现了数据的获取与保存。

a、数据库表

根据获取到的json数据，建立表BDPOI，表结构设计如下：

b、获取并保存数据

package com.lzugis.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.sql.SQLException;

import com.lzugis.db.ConOrcl;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class GetPoiData {

	public static void main(String[] args) throws SQLException {
		String poiUrl = "http://apis.juhe.cn/baidu/getData";
		String poiParam = "key=7ea83e6f1e025782c47229b49865111b&dtype=json&city=北京市"+
				"&page="+1+"&cid=1";
		String poiResult = SendGET(poiUrl,poiParam);	
		JSONObject poiJson = JSONObject.fromObject(poiResult);
		System.out.println(poiJson);
		int pageAll = poiJson.getJSONObject("result").getJSONObject("pageinfo").getInt("pageall");

		for(int i=0;i<pageAll;i++){
			System.out.println("—————————————————————————————————————————————");
			System.out.println("第"+(i+1)+"页");
			String poiParam = "key=7ea83e6f1e025782c47229b49865111b&dtype=json&city=北京市"+
					"&page="+(i+1)+"&cid=1";
			String poiResult = SendGET(poiUrl,poiParam);	
			JSONObject poiJson = JSONObject.fromObject(poiResult);
			JSONArray data = http://www.mamicode.com/poiJson.getJSONObject("result").getJSONArray("data");
			int size = data.size();
			for(int j=0;j<size;j++){
				JSONObject item = data.getJSONObject(j);
				//id,title,addr,pro,city,tags,ty1,ty2,lng,lat
				String sql = "insert into bdpoi values(‘"+item.getString("id")+"‘,‘"
						+item.getString("title")+"‘,‘"
						+item.getString("address")+"‘,‘"
						+item.getString("province")+"‘,‘"
						+item.getString("city")+"‘,‘"
						+item.getString("tags")+"‘,"
						+item.getInt("type1")+","
						+item.getInt("type2")+","
						+item.getDouble("lng")+","
						+item.getDouble("lat")+")";				
				System.out.println("	"+sql);				
				ConOrcl.runSql(sql);				
			}
		}
	}	
	
	public static String SendGET(String url,String param){
		String result="";//访问返回结果
		BufferedReader read=null;//读取访问结果
		try {
		    //创建url
		    URL realurl=new URL(url+"?"+param);
		    //打开连接
		    URLConnection connection=realurl.openConnection();
		    // 设置通用的请求属性
		    connection.setRequestProperty("accept", "*/*");
		    connection.setRequestProperty("connection", "Keep-Alive");
		    connection.setRequestProperty("user-agent",
		       "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
		    //建立连接
		    connection.connect();
		    // 定义 BufferedReader输入流来读取URL的响应
		    read = new BufferedReader(new InputStreamReader(
		       connection.getInputStream(),"UTF-8"));
		    String line;//循环读取
		    while ((line = read.readLine()) != null) {
		       result += line;
		    }
		} 
		catch (IOException e) {
		    e.printStackTrace();
		}
		finally{
			if(read!=null){//关闭流
				try {
					read.close();
				} 
				catch (IOException e) {
					e.printStackTrace();
				}
		    }
		}		    
		return result; 
	}
}

注：聚合数据是有请求次数限制的，想获取更多的话就自己想办法掏钱吧！