JAVA地址通过百度地图API转化为经纬度

public static Map getLngAndLat(String address) {
        Map map = new HashMap();
        String url = "http://api.map.baidu.com/geocoder/v2/?address=" + address + "&output=json&ak=你的ak";   //这里需要自己申请百度ak
        try {
            String json = loadJSON(url);
            JSONObject obj = JSONObject.fromObject(json);
            if (obj.get("status").toString().equals("0")) {
                double lng = obj.getJSONObject("result").getJSONObject("location").getDouble("lng");
                double lat = obj.getJSONObject("result").getJSONObject("location").getDouble("lat");
                map.put("lng", getDecimal(lng));
                map.put("lat", getDecimal(lat));
                //System.out.println("经度："+lng+"---纬度："+lat);
            } else {
                map.put("error", "未找到相匹配的经纬度！");
                System.out.println("未找到相匹配的经纬度！");
            }
        } catch (Exception e) {
            map.put("error", "未找到相匹配的经纬度，请检查地址");
            System.out.println("未找到相匹配的经纬度！请检查地址");
        }
        return map;
    }
 
    public static double getDecimal(double num) {
        if (Double.isNaN(num)) {
            return 0;
        }
        BigDecimal bd = new BigDecimal(num);
        num = bd.setScale(6, BigDecimal.ROUND_HALF_UP).doubleValue();
        return num;
    }
 
    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();
    }