java根据地址获取百度API经纬度

java根据地址获取百度API经纬度（详细文档）

public void getLarLng(String address) throws Exception {

        String ak = "vZ5wAkH9uc6mCnrhtYWey2fBHBmU9Rh5";

        String addressUrl = "http://api.map.baidu.com/geocoder/v2/?address=" + address + "&output=json&ak=" + ak + "&callback=showLocation";

        URL url = new URL(addressUrl);

        InputStream inputStream = url.openStream();

        String string = IOUtils.toString(inputStream);

        // showLocation&&showLocation({"status":0,"result":{"location":{"lng":121.4423987575458,"lat":30.939981749234133},"precise":1,"confidence":80,"level":"道路"}})

        System.out.println(string);

        int len = string.length();

        String substring = string.substring(27, len - 1);

        // {"status":0,"result":{"location":{"lng":121.4423987575458,"lat":30.939981749234133},"precise":1,"confidence":80,"level":"道路"}}
        System.out.println(substring);

        JSONObject jsonObject = JSONObject.parseObject(substring);

        String status = jsonObject.getString("status");

        Double lng = 0.0;

        Double lat = 0.0;

        if (status.equals("0")){

            lng = jsonObject.getJSONObject("result").getJSONObject("location").getDouble("lng");

            lat = jsonObject.getJSONObject("result").getJSONObject("location").getDouble("lat");
        }

        if (Double.isNaN(lng)){
            System.out.println(0);
        }
        BigDecimal bd = new BigDecimal(lng);
        // 保留小数点后六位 并做四舍五入
        double v = bd.setScale(6, BigDecimal.ROUND_HALF_UP).doubleValue();

        System.out.println(v);
        System.out.println(lat);
    }