Android Http请求方法汇总

Android Http请求方法汇总

原帖：http://www.open-open.com/lib/view/open1351324240738.html

1. 使用JDK中HttpURLConnection访问网络资源

(1)get请求

public String executeHttpGet() {String result = null;URL url = null;HttpURLConnection connection = null;InputStreamReader in = null;try {url = new URL("http://10.0.2.2:8888/data/get/?token=alexzhou");connection = (HttpURLConnection) url.openConnection();in = new InputStreamReader(connection.getInputStream());BufferedReader bufferedReader = new BufferedReader(in);StringBuffer strBuffer = new StringBuffer();String line = null;while ((line = bufferedReader.readLine()) != null) {strBuffer.append(line);}result = strBuffer.toString();} catch (Exception e) {e.printStackTrace();} finally {if (connection != null) {connection.disconnect();}if (in != null) {try {in.close();} catch (IOException e) {e.printStackTrace();}}}return result;}

注意：因为是通过android模拟器访问本地pc服务端，所以不能使用localhost和127.0.0.1，使用127.0.0.1会访问模拟器自身。Android系统为实现通信将PC的IP设置为10.0.2.2

(2)post请求

public String executeHttpPost() {String result = null;URL url = null;HttpURLConnection connection = null;InputStreamReader in = null;try {url = new URL("http://10.0.2.2:8888/data/post/");connection = (HttpURLConnection) url.openConnection();connection.setDoInput(true);connection.setDoOutput(true);connection.setRequestMethod("POST");connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");connection.setRequestProperty("Charset", "utf-8");DataOutputStream dop = new DataOutputStream(connection.getOutputStream());dop.writeBytes("token=alexzhou");dop.flush();dop.close();in = new InputStreamReader(connection.getInputStream());BufferedReader bufferedReader = new BufferedReader(in);StringBuffer strBuffer = new StringBuffer();String line = null;while ((line = bufferedReader.readLine()) != null) {strBuffer.append(line);}result = strBuffer.toString();} catch (Exception e) {e.printStackTrace();} finally {if (connection != null) {connection.disconnect();}if (in != null) {try {in.close();} catch (IOException e) {e.printStackTrace();}}}return result;}

如果参数中有中文的话，可以使用下面的方式进行编码解码：

URLEncoder.encode("测试","utf-8")URLDecoder.decode("测试","utf-8");

2.使用Apache的HttpClient访问网络资源

(1)get请求

public String executeGet() {String result = null;BufferedReader reader = null;try {HttpClient client = new DefaultHttpClient();HttpGet request = new HttpGet();request.setURI(new URI("http://10.0.2.2:8888/data/get/?token=alexzhou"));HttpResponse response = client.execute(request);reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));StringBuffer strBuffer = new StringBuffer("");String line = null;while ((line = reader.readLine()) != null) {strBuffer.append(line);}result = strBuffer.toString();} catch (Exception e) {e.printStackTrace();} finally {if (reader != null) {try {reader.close();reader = null;} catch (IOException e) {e.printStackTrace();}}}return result;}

（2）post请求

public String executePost() {String result = null;BufferedReader reader = null;try {HttpClient client = new DefaultHttpClient();HttpPost request = new HttpPost();request.setURI(new URI("http://10.0.2.2:8888/data/post/"));List<NameValuePair> postParameters = new ArrayList<NameValuePair>();postParameters.add(new BasicNameValuePair("token", "alexzhou"));UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(postParameters);request.setEntity(formEntity);HttpResponse response = client.execute(request);reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));StringBuffer strBuffer = new StringBuffer("");String line = null;while ((line = reader.readLine()) != null) {strBuffer.append(line);}result = strBuffer.toString();} catch (Exception e) {e.printStackTrace();} finally {if (reader != null) {try {reader.close();reader = null;} catch (IOException e) {e.printStackTrace();}}}return result;}