高德抓路服务精确获取道路定位信息 道路等级 限速值

最近由于公司需要获取车辆当前所在地点的道路等级和限速值，但是由于以前是根据gps回传定位位置名称进行判断，容易造成数据误报，所以将车辆最新的三个点位信息存储起来进行高德查询 引用了hutool工具包
实例：
package com.ltmonitor.util;

import cn.hutool.json.JSONArray;
import cn.hutool.json.JSONUtil;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

/**

• @program: gps-root

• @description: 高德服务

• @author: wj

• @create: 2020-04-28 13:49
  **/
  public class LbsLocation {

  private static String key=“key”;

  public static JSONArray GDautograsp(String carid,String locations,String time,String direction,String speed) {
  JSONArray jsonArray=new JSONArray();
  // carid=“abcd123456”;
  // locations=“116.496167,39.917066|116.496149,39.917205|116.496149,39.917326”;
  // time=“1434077500,1434077501,1434077510”;
  // direction=“1,1,2”;
  // speed=“1,1,2”;
  // carid=“1db1”+carid;
  String httpUrl = “https://restapi.amap.com/v3/autograsp?carid=”+carid+
  “&locations=”+locations +
  “&time=”+time +
  “&direction=”+direction +
  “&speed=”+speed +
  “&output=json&key=”+key;
  StringBuilder json = new StringBuilder();
  URL url = null;
  HttpURLConnection httpConn = null;
  try {
  String address = httpUrl;
  url = new URL(address);
  httpConn = (HttpURLConnection) url.openConnection();
  //URL连接可用于input或output。如果想用URL连接输入，设置DoInput标签为true。
  //输入和输出是针对计算机的，如果以程序员的角度考虑，经常弄混。
  //input输入，output输出，那么不是从output里read，input中write吗，其实相反
  //input输入进计算机，计算机才能读，所以是从input read，而output是计算机输出，通过output write。
  httpConn.setDoOutput(false);
  //所以如果setDoInput(false)，想从URLConnection读取时不能读取
  //Cannot read from URLConnection if doInput=false (call setDoInput(true))
  httpConn.setDoInput(true);
  //连接建立超时时间还有读取数据超时时间，
  httpConn.setConnectTimeout(10000);
  httpConn.setReadTimeout(10000);
  httpConn.setRequestMethod(“GET”);
  httpConn.connect();
  //获取状态码
  int code = httpConn.getResponseCode();
  System.out.println(code);
  //读http请求响应
  BufferedReader reader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), “utf-8”));
  String inputLine = null;
  while((inputLine = reader.readLine()) != null) {
  json.append(inputLine);
  }
  String maxspeed=JSONUtil.parseObj(json.toString()).get(“roads”).toString();
  jsonArray=JSONUtil.parseArray(maxspeed);
  //关闭IO和连接
  reader.close();
  httpConn.disconnect();
  }
  catch(Exception e){
  System.out.println(“error in wapaction,and e is " + e.getMessage());
  }
  finally{
  if(httpConn!=null){
  httpConn.disconnect();
  }
  }
  return jsonArray;
  }
  public static void main(String[] args) {
  System.out.println(GDautograsp(”","","","",""));
  }

}