根据经纬度获取地区名称，根据地区名称获取经纬度

最新推荐文章于 2024-11-20 20:54:25 发布

原创最新推荐文章于 2024-11-20 20:54:25 发布 · 1w 阅读

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本文介绍了一种使用Java实现的GPS坐标转换方法，并提供了从地址获取经纬度及从经纬度反查地址的具体代码实现。文章展示了如何调用百度地图API进行地理编码和逆地理编码，适用于需要地理位置信息处理的应用场景。

import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

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

/**
 * @author xrj
 * @date 2020/6/8
 */
public class GpsUtil {


//    public static void main(String[] args) {
//        System.out.println(reverseInt(376419585468736L)+"");
//    }




    public static long reverseInt(long i){
        long s,j=0;
        s=i;
        while (s!=0){
            j = j*10 + s%10;
            s = s/10;
        }
        return j;
    }


    /**
     * https://lbs.amap.com/console/show/picker?spm=a2c4g.11186623.2.25.1efd56f7y6ENFy
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {
        Object[] o = getCoordinate("成都市天府四街");
        //经度
        System.out.println(o[0]);
        //纬度
        System.out.println(o[1]);
        getCityFromLngAndlat("104.052288,30.546999");
    }

    /**
     * @param addr
     * 查询的地址
     * @return
     * @throws IOException
     */
    public  static Object[] getCoordinate(String addr) throws IOException {
        //经度
        String lng = null;
        //纬度
        String lat = null;
        String address = null;
        try {
            address = java.net.URLEncoder.encode(addr, "UTF-8");
        }catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        }
        String key = "f247cdb592eb43ebac6ccd27f796e2d2";
        String url = String .format("http://api.map.baidu.com/geocoder?address=%s&output=json&key=%s", address, key);
        URL myURL = null;
        URLConnection httpsConn = null;
        try {
            myURL = new URL(url);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        InputStreamReader insr = null;
        BufferedReader br = null;
        try {
            httpsConn = myURL.openConnection();
            // 不使用代理
            if (httpsConn != null) {
                insr = new InputStreamReader( httpsConn.getInputStream(), "UTF-8");
                br = new BufferedReader(insr);
                String data = null;
                int count = 1;
                while((data= br.readLine())!=null){
                    if(count==5){
                        lng = (String)data.subSequence(data.indexOf(":")+1, data.indexOf(","));
                        //经度
                        count++;
                    }else if(count==6){
                        lat = data.substring(data.indexOf(":")+1);
                        //纬度
                        count++;
                    }else{
                        count++;
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(insr!=null){
                insr.close();
            }
            if(br!=null){
                br.close();
            }
        }
        return new Object[]{lng,lat};
    }


    /**
     * 22.75424,112.76535
     * @param str
     * @throws IOException
     */
    public static void getCityFromLngAndlat(String str) throws IOException {
        //通过修改这里的location（经纬度）参数，即可得到相应经纬度的详细信息
        //f247cdb592eb43ebac6ccd27f796e2d2
        //pmCgmADsAsD9rEXkqWNcTzjd
        String url2 = "http://api.map.baidu.com/geocoder/v2/?ak=pmCgmADsAsD9rEXkqWNcTzjd&location="+str+"&output=json&pois=1 ";
        URL myURL2 = null;
        URLConnection httpsConn2 = null;
        try {
            myURL2 = new URL(url2);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        InputStreamReader insr2 = null;
        BufferedReader br2 = null;
        try {
            httpsConn2 =  myURL2.openConnection();
            // 不使用代理
            if (httpsConn2 != null) {
                insr2 = new InputStreamReader( httpsConn2.getInputStream(), "UTF-8");
                br2 = new BufferedReader(insr2);
                String data2 = br2.readLine();
                System.out.println("data2:"+data2);
                try
                {
                    //解析得到的json格式数据
                    JSONObject dataJson = new JSONObject(data2);
                    JSONObject result = dataJson.getJSONObject("result");
                    JSONObject addressComponent = result.getJSONObject("addressComponent");
                    String city = addressComponent.getString("city");
                    System.out.println("city = " + city);
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(insr2!=null){
                insr2.close();
            }
        }
    }

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