百度地图根据地址获取经纬度

地理编码服务
地理编码服务（又名Geocoder）是一类Web API接口服务；
地理编码服务提供将结构化地址数据（如：北京市海淀区上地十街十号）转换为对应坐标点（经纬度）功能；
用户可通过该功能，将结构化地址（省/市/区/街道/门牌号）解析为对应的位置坐标。地址结构越完整，地址内容越准确，解析的坐标精度越高。

核心代码

JSONObject location = getAddressLngLatPoint(schoolRegionDTO.getAddress());
if (ObjectUtil.isNotEmpty(location)) {
    schoolRegionDTO.setBizLongitude(location.getString("lng"));
    schoolRegionDTO.setBizLatitude(location.getString("lat"));
}

private JSONObject getAddressLngLatPoint(String address) throws Exception {
    URL url = new URL("https://api.map.baidu.com/geocoding/v3/?address=" + address + "&output=json&ak=" + "密钥");
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.connect();

    InputStream urlStream  = connection.getInputStream();
    java.io.BufferedReader reader = new BufferedReader(new InputStreamReader(urlStream));
    String result = reader.readLine();

    JSONObject jsonObject = JSON.parseObject(result);
    if (jsonObject.getInteger("status") != 0) {
        return null;
    }
    return (JSONObject) ((JSONObject) jsonObject.get("result")).get("location");
}