JAVA 调用地图API

要使用百度地图的api就要先建立连接，调用百度地图的API，然后调用的百度地图接口会返回相应的信息，对于返回的数据不能直接读取，而需通过数据流获取，下面为从网上找的连接及读取的代码：

public static String connectURL(String dest_url, String commString) {        String rec_string = "";        URL url = null;        HttpURLConnection urlconn = null;        OutputStream out = null;        BufferedReader rd = null;        try {            url = new URL(dest_url);            urlconn = (HttpURLConnection) url.openConnection();            urlconn.setReadTimeout(1000 * 30);            urlconn.setRequestMethod("POST");            urlconn.setDoInput(true);             urlconn.setDoOutput(true);            out = urlconn.getOutputStream();            out.write(commString.getBytes("UTF-8"));            out.flush();             out.close();            rd = new BufferedReader(new InputStreamReader(urlconn.getInputStream(),"UTF-8"));            StringBuffer sb = new StringBuffer();            int ch;            while ((ch = rd.read()) > -1)                sb.append((char) ch);            rec_string = sb.toString();        } catch (Exception e) {            return "";        } finally {            try {                if (out != null) {                    out.close();                }                if (urlconn != null) {                    urlconn.disconnect();                }                if (rd != null) {                    rd.close();                }            } catch (Exception e) {            }        }        return rec_string;    }

很感谢网友的分享，具体地址找不到了，很抱歉！

连接及读取的方法已经有了，剩下的就是调用这方法就好了，例如：

    String url = "http://api.map.baidu.com/direction/v1?mode=driving&origin=清华大学&destination=北京大学&origin_region=北京&destination_region=北京&output=json&ak=您的ak";    String result =MapUtil.connectURL(url,"");  

此时result中的数据即是想要的对应的结果；调用其他的百度地图api只需参考API文档，加入对应的参数就可以了。

JAVA创建连接，解析返回结果

//连接及解析高德地图    public static String getResponse(String serverUrl){        //用JAVA发起http请求，并返回json格式的结果        StringBuffer result = new StringBuffer();        try {            URL url = new URL(serverUrl);            URLConnection conn = url.openConnection();            BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));            String line;            while((line = in.readLine()) != null){                result.append(line);            }            in.close();        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return result.toString();    }