java高德地图根据坐标与具体地址互转，计算两地距离

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

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

/**

• 高德地图根据地名获取经纬度，计算距离

• 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 GaodMap {

  //高德地图申请的key值
  public static final String MAP_KEY = “xxx”;
  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
  • */
    public 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=&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;
    }

  // 将经纬度getLng， getLat 通过getAmapByLngAndLat方法转换地址
  public static String getAmapByLngAndLat(String getLng, String getLat) throws Exception {
  String url;
  try {
  url = “http://restapi.amap.com/v3/geocode/regeo?output=JSON&location=” + getLng + “,” + getLat
  + “&key=MAP_KEY&radius=0&extensions=base”;
  String queryResult = getResponse(url); // 高德接品返回的是JSON格式的字符串
  if (queryResult == null) {
  return “-1”;
  }
  // 将获取结果转为json 数据
  JSONObject obj = JSONObject.parseObject(queryResult);
  if (obj.get(“status”).toString().equals(“1”)) {
  // 如果没有返回-1

   		JSONObject regeocode = obj.getJSONObject("regeocode");
   		if (regeocode.size() > 0) {
   			// 在regeocode中拿到 formatted_address 具体位置
   			String formatted = regeocode.get("formatted_address").toString();
   			return formatted;
  
   		} else {
   			System.out.println("未找到相匹配的地址！");
   			return "-1";
  
   		}
   	} else {
   		System.out.println("请求错误！");
   		return "-1";
   	}
   } catch (Exception e) {
   	// TODO Auto-generated catch block
   	e.printStackTrace();
   }
   return "-1";
  

  }

  /**

  • 2.经纬度算出两点间距离
  • */
    public 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=MAP_KEY&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
  • */
    public 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();
    }

}