java中根据实际地址获取百度地图的经纬度

这里需要保证传递过来的地址是实际存在的地址；最好单独写个方法提前验证下

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;

/**
 * 获取经纬度
 * 密钥:这里的密钥是在baidu的后台申请的服务端的key
 * @author only-dream
 */
public class GetLatAndLngByBaidu {
    /**
     * @param addr
     *            查询的地址
     * @return
     * @throws IOException
     */
    public Object[] getCoordinate(String addr) throws IOException {
        String lng = null;// 经度
        String lat = null;// 纬度
        String address = null;
        try {
            address = java.net.URLEncoder.encode(addr, "UTF-8");
        } catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        }
        String key = "你的密钥";
        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(","));// 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 };
    }

    public static void main(String[] args) throws IOException {
        GetLatAndLngByBaidu getLatAndLngByBaidu = new GetLatAndLngByBaidu();
        Object[] o = getLatAndLngByBaidu.getCoordinate("河北省衡水市桃城区赵家圈镇衡海防爆电器有限公司");
        System.out.println(o[0]);// 经度
        System.out.println(o[1]);// 纬度
    }

}

/*换个写法*/
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(这里用一句话描述这个类的作用)
 * 
 */
public class baidudituController {
    static String AK = "你的密钥"; // 百度地图密钥

    public static void main(String[] args) {
        String dom = "北京王府井";
        String coordinate = getCoordinate(dom);
        System.out.println("'" + dom + "'的经纬度为：" + coordinate);
        // System.err.println("######同步坐标已达到日配额6000限制，请明天再试！#####");
    }

    // 调用百度地图API根据地址，获取坐标
    public static String getCoordinate(String address) {
        if (address != null && !"".equals(address)) {
            address = address.replaceAll("\s*", "").replace("#", "栋");
            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"); // 经度
                    double lat = obj.getJSONObject("result").getJSONObject("location").getDouble("lat"); // 纬度
                    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();
    }
}