获取两地之间距离(真实地址或经纬度)高德API-JAVA版

此工具类有两个功能,一是,传入两个真实地址,可以得到这两个地址间距离; 二是,传入两个经纬度,也可以得到两者相距多少,单位是米

package util;
import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStreamReader;  
import java.net.MalformedURLException;  
import java.net.URL;  
import java.net.URLConnection;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;  
  
/**
 * 1.这个需要客户申请个高德API上面的key,也可以自己申请(免费的，很快)
 * */
public class GetDistance {  
    public static void main(String[] args){  
        String start = "北京天安门";  
        String end = "上海市黄浦区西藏中路";  
  
        String startLonLat = getLonLat(start);  
        String endLonLat = getLonLat(end);  
  
        System.out.println("起始地："+start+",经纬度："+startLonLat);  
        System.out.println("终点："+end+",经纬度："+endLonLat);  

        Long dis = getDistance(startLonLat,endLonLat);  
        System.out.println("两点间距离："+dis+"米");  
    } 
    /**
     * 0.得到两个地址间距离
     * */
    public static long getDistanceByAdress(String start,String end){  
        String startLonLat = getLonLat(start);  
        String endLonLat = getLonLat(end); 
        long dis = getDistance(startLonLat,endLonLat);
        return dis;
    }      
    
    /**
     * 1.地址转换为经纬度
     * */
    private static String getLonLat(String address){  
        //返回输入地址address的经纬度信息, 格式是 经度,纬度  
        String queryUrl = "http://restapi.amap.com/v3/geocode/geo?key=c79946f188c7e87f7c4928b666de66da&address="+address;  
        String queryResult = getResponse(queryUrl);  //高德接品返回的是JSON格式的字符串           
        JSONObject job = JSONObject.parseObject(queryResult);      
        JSONObject jobJSON = JSONObject.parseObject(job.get("geocodes").toString().substring(1, job.get("geocodes").toString().length()-1));  
        String DZ = jobJSON.get("location").toString();
        System.out.println("经纬度："+DZ);
        return DZ;
    }  
  
    /**
     * 2.经纬度算出两点间距离
     * */
    private static long getDistance(String startLonLat, String endLonLat){  
        //返回起始地startAddr与目的地endAddr之间的距离，单位：米  
        Long result = new Long(0);  
        String queryUrl = "http://restapi.amap.com/v3/distance?key=c79946f188c7e87f7c4928b666de66da&origins="+startLonLat+"&destination="+endLonLat;  
        String queryResult = getResponse(queryUrl);  
        JSONObject job = JSONObject.parseObject(queryResult); 
        JSONArray ja = job.getJSONArray("results");  
        JSONObject jobO = JSONObject.parseObject(ja.getString(0)); 
        result = Long.parseLong(jobO.get("distance").toString());
        System.out.println("距离2："+result);
        return result;  
    }  
  
    /**
     * 3.发送请求
     * */
    private static String getResponse(String serverUrl){  
        //用JAVA发起http请求，并返回json格式的结果  
        StringBuffer result = new StringBuffer();  
        try {  
            URL url = new URL(serverUrl);  
            URLConnection conn = url.openConnection();  
            BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));   
            String line;  
            while((line = in.readLine()) != null){  
                result.append(line);  
            }  
            in.close();  
        } catch (MalformedURLException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        return result.toString();  
    }  
}