java调用百度地图API根据地理位置获取经纬度

2019-10-24  本文已影响0人  氨基钠

准备工作

1、申请百度ak(v1版本的key) 百度地图开放平台链接:http://lbsyun.baidu.com/

2、百度地图web服务API链接:http://lbsyun.baidu.com/index.php?title=webapi/guide/webservice-geocoding

百度地图有json和xml两种形式存储数据

3、导入jar包:此处通过json形式,需导入jar包

json所需要的jar包如下:

json-lib-2.3-jdk15.jar

json所依赖的jar如下:

commons-beanutils-1.8.0.jar

commons-collections-3.2.1.jar

commons-lang-2.4.jar

commons-logging-1.1.jar

ezmorph-1.0.6.jar

下载jar包链接:http://download.csdn.net/download/ghjzzhg/10014271

采用maven导入jar包:


<dependency>
        <groupId>commons-beanutils</groupId>
        <artifactId>commons-beanutils-core</artifactId>
        <version>1.8.0</version>
    </dependency>
<dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
        <version>3.2.1</version>
</dependency>
<dependency>
        <groupId>commons-lang</groupId>  
        <artifactId>commons-lang</artifactId>  
        <version>2.6</version> 
</dependency>
<dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.1.1</version>
</dependency>
<dependency>  
        <groupId>net.sf.json-lib</groupId>  
        <artifactId>json-lib</artifactId>  
    <version>2.3</version>  
        <classifier>jdk15</classifier>  
</dependency>
<dependency>
    <groupId>net.sf.ezmorph</groupId>
    <artifactId>ezmorph</artifactId>
    <version>1.0.6</version>
</dependency>

代码:

package cn.zx.ghjmaven.utils;   
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.Map;
import net.sf.json.JSONObject;
 
/** 
 * @author 作者 : 
 * @createDate 创建时间:
 * 类说明 -- 百度地图经纬度和地址相互转换的工具类
 */
public class BaiduMapUtils {
    private static final  String AK = "XXXXXXXX";
    /**
     * 百度地图通过经纬度来获取地址,传入参数纬度lat、经度lng
     * @param lat
     * @param lng
     * @return
     */
    public static String getDetailAddress(String lat, String lng) { 
        JSONObject obj = getLocationInfo(lat, lng).getJSONObject("result");
        return obj.getString("formatted_address");  
    }   
    
    /**
     * 获取City
     * @param lat
     * @param lng
     * @return
     */
    public static String getCity(String lat, String lng) {  
        JSONObject obj = getLocationInfo(lat, lng).getJSONObject("result").getJSONObject("addressComponent");
        return obj.getString("city");   
    }

    public static JSONObject getLocationInfo(String lat, String lng) {
        String url = "http://api.map.baidu.com/geocoding/v3/?callback=renderReverse&location="+lat+","+lng+"&output=json&pois=0&ak="+AK;
        JSONObject obj = JSONObject.fromObject(loadJSON(url));
        System.out.println(obj);
        return obj;
    }
    
    /**
     * 百度地图通过地址来获取经纬度,传入参数address
     * @param address
     * @return
     * Todo
     */
    public static Map<String,Double> getLngAndLat(String address){
        Map<String,Double> map=new HashMap<String, Double>();
        String url = "http://api.map.baidu.com/geocoding/v3/?address="+address+"&output=json&ak="+AK;
        String json = loadJSON(url);
        JSONObject obj = JSONObject.parseObject(json);
        if(obj.get("status").toString().equals("0")){
            double lng=obj.getJSONObject("result").getJSONObject("location").getDouble("lng");
            double lat=obj.getJSONObject("result").getJSONObject("location").getDouble("lat");
            map.put("lng", lng);
            map.put("lat", lat);
            System.out.println("经度:" + lng + "--- 纬度:" + lat);
        }else{
            System.out.println("未找到相匹配的经纬度!");
        }
        return map;
    }

    public static String loadJSON (String url) {
        StringBuilder json = new StringBuilder();
        try {
            URL oracle = new URL(url);
            URLConnection yc = oracle.openConnection();
            BufferedReader in = new BufferedReader(new InputStreamReader(
                    yc.getInputStream(),"UTF-8"));
            String inputLine = null;
            while ( (inputLine = in.readLine()) != null) {
                json.append(inputLine);
            }
            in.close();
        } catch (Exception e) {
        }

        return json.toString();
    }
}

转自https://blog.csdn.net/ghjzzhg/article/details/78193739#commentBox

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