Android通过URL获取网络数据(2)

//第一种/** * 获取参数(ArrayList nameValuePairs,String url)后post给远程服务器 * 将获得的返回结果(String)返回给调用者 * 本函数适用于查询数量较少的时候 * qian.long * 2011-06-07 */public String posturl(ArrayList nameValuePairs,String url) {    String result = "";    String tmp= "";    InputStream is = null;    try {        HttpClient httpclient = new DefaultHttpClient();        HttpPost httppost = new HttpPost(url);        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));        HttpResponse response = httpclient.execute(httppost);        HttpEntity entity = response.getEntity();        is = entity.getContent();    } catch(Exception e) {        return "Fail to establish http connection!";    }     try {        BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));        StringBuilder sb = new StringBuilder();        String line = null;        while ((line = reader.readLine()) != null) {            sb.append(line + "\n");        }        is.close();         tmp = sb.toString();    } catch (Exception e) {        return "Fail to convert net stream!";    }     try {        JSONArray jArray = new JSONArray(tmp);        for(int i = 0; i < jArray.length(); i++) {            JSONObject json_data = jArray.getJSONObject(i);            Iterator<?> keys=json_data.keys();            while(keys.hasNext()) {                result += json_data.getString(keys.next().toString());            }        }    } catch (JSONException e) {        return "The URL you post is wrong!";    }     return result;} //第二种/** * 获取参数指定的网页代码，将其返回给调用者，由调用者对其解析 * 返回String * qian.long * 2011-06-07 */public String posturl(String url) {    InputStream is = null;    String result = "";     try {        HttpClient httpclient = new DefaultHttpClient();        HttpPost httppost = new HttpPost(url);        HttpResponse response = httpclient.execute(httppost);        HttpEntity entity = response.getEntity();        is = entity.getContent();    } catch(Exception e) {        return "Fail to establish http connection!"+e.toString();    }     try{        BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));        StringBuilder sb = new StringBuilder();        String line = null;        while ((line = reader.readLine()) != null) {            sb.append(line + "\n");        }        is.close();         result=sb.toString();    } catch (Exception e) {        return "Fail to convert net stream!";    }     return result;} //第三种/** * 获取指定地址的网页数据 * 返回数据流 * qian.long * 2011-06-07 */public InputStream streampost(String remote_addr) {    URL infoUrl = null;    InputStream inStream = null;    try {        infoUrl = new URL(remote_addr);        URLConnection connection = infoUrl.openConnection();        HttpURLConnection httpConnection = (HttpURLConnection)connection;        int responseCode = httpConnection.getResponseCode();        if(responseCode == HttpURLConnection.HTTP_OK) {            inStream = httpConnection.getInputStream();        }    } catch (MalformedURLException e) {        // TODO Auto-generated catch block        e.printStackTrace();    } catch (IOException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }    return inStream;}
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