java中根據實際地址獲取百度地圖的經緯度

這里需要保證傳遞過來的地址是實際存在的地址；最好單獨寫個方法提前驗證下

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;

/**
 * 獲取經緯度
 * 密鑰:這里的密鑰是在baidu的后台申請的服務端的key
 * @author only-dream
 */
public class GetLatAndLngByBaidu {
    /**
     * @param addr
     *            查詢的地址
     * @return
     * @throws IOException
     */
    public Object[] getCoordinate(String addr) throws IOException {
        String lng = null;// 經度
        String lat = null;// 緯度
        String address = null;
        try {
            address = java.net.URLEncoder.encode(addr, "UTF-8");
        } catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        }
        String key = "你的密鑰";
        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 = (URLConnection) 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 && (!data.equals("INVALID_PARAMETERS")) ) {
                    if (count == 5) {
                        lng = (String) data.subSequence(data.indexOf(":") + 1, data.indexOf(","));// 經度
                        count++;
                    } else if (count == 6) {
                        lat = data.substring(data.indexOf(":") + 1);// 緯度
                        count++;
                    } else {
                        count++;
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (insr != null) {
                insr.close();
            }
            if (br != null) {
                br.close();
            }
        }
        return new Object[] { lng, lat };
    }

    public static void main(String[] args) throws IOException {
        GetLatAndLngByBaidu getLatAndLngByBaidu = new GetLatAndLngByBaidu();
        Object[] o = getLatAndLngByBaidu.getCoordinate("河北省衡水市桃城區趙家圈鎮衡海防爆電器有限公司");
        System.out.println(o[0]);// 經度
        System.out.println(o[1]);// 緯度
    }

}

 

 

/*換個寫法*/
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 java.text.DecimalFormat;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;

/**
 * @ClassName: EntCoordSyncJob
 * @Description: TODO(這里用一句話描述這個類的作用)
 * 
 */
public class baidudituController {
    static String AK = "你的密鑰"; // 百度地圖密鑰

    public static void main(String[] args) {
        String dom = "北京王府井";
        String coordinate = getCoordinate(dom);
        System.out.println("'" + dom + "'的經緯度為：" + coordinate);
        // System.err.println("######同步坐標已達到日配額6000限制，請明天再試！#####");
    }

    // 調用百度地圖API根據地址，獲取坐標
    public static String getCoordinate(String address) {
        if (address != null && !"".equals(address)) {
            address = address.replaceAll("\\s*", "").replace("#", "棟");
            String url = "http://api.map.baidu.com/geocoder/v2/?address=" + address + "&output=json&ak=" + AK;
            String json = loadJSON(url);
            if (json != null && !"".equals(json)) {
                // JSONObject obj = JSONObject.fromObject(json);
                JSONObject obj = JSON.parseObject(json);
                if ("0".equals(obj.getString("status"))) {
                    double lng = obj.getJSONObject("result").getJSONObject("location").getDouble("lng"); // 經度
                    double lat = obj.getJSONObject("result").getJSONObject("location").getDouble("lat"); // 緯度
                    DecimalFormat df = new DecimalFormat("#.######");
                    return df.format(lng) + "," + df.format(lat);
                }
            }
        }
        return null;
    }

    public static String loadJSON(String url) {
        StringBuilder json = new StringBuilder();
        try {
            URL oracle = new URL(url);
            URLConnection yc = oracle.openConnection();
            BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream(), "UTF-8"));
            String inputLine = null;
            while ((inputLine = in.readLine()) != null) {
                json.append(inputLine);
            }
            in.close();
        } catch (MalformedURLException e) {
        } catch (IOException e) {
        }
        return json.toString();
    }
}