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();
}
}