google map api怎么根据地名获取经纬度？

    /**     * 根据地址返回经纬度     * @param addr     * @return 返回经纬度数据, latLng[0]经度,latLng[1]维度     */    public static String[] getCoordinate(String addr) {        String[] latLng = new String[2];        String address = null;        try {            address = java.net.URLEncoder.encode(addr, "UTF-8");        } catch (UnsupportedEncodingException e1) {            e1.printStackTrace();        }        ;        String output = "csv";        //密钥可以随便写一个key=abc        String key = "abc";        String url = "http://maps.google.com/maps/geo?q=" + address + "&output=" + output + "&key=" + key;        URL googleMapURL = null;        URLConnection httpsConn = null;        // 进行转码        try {            googleMapURL = new URL(url);        } catch (MalformedURLException e) {            e.printStackTrace();        }        try {            httpsConn = (URLConnection)googleMapURL.openConnection();            if (httpsConn != null) {                InputStreamReader insr = new InputStreamReader(httpsConn.getInputStream(), "UTF-8");                BufferedReader br = new BufferedReader(insr);                String data = null;                if ((data = br.readLine()) != null) {                    String[] retList = data.split(",");                    /*                     * String latitude = retList[2]; String longitude =                     * retList[3];                     *                      * System.out.println("纬度"+ latitude);                     * System.out.println("经度"+ longitude);                     */                    if (retList.length > 2 && ("200".equals(retList[0]))) {                        latLng[0] = retList[2];                        latLng[1] = retList[3];                    }                }                insr.close();            }        } catch (IOException e) {            e.printStackTrace();        }        return latLng;    }