android 網絡請求方式 例子

java.net包中的HttpURLConnection類

Get方式：

// Get方式請求
public static void requestByGet() throws Exception {
	String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
	// 新建一個URL對象
	URL url = new URL(path);
	// 打開一個HttpURLConnection連接
	HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
	// 設置連接超時時間
	urlConn.setConnectTimeout(5 * 1000);
	// 開始連接
	urlConn.connect();
	// 判斷請求是否成功
	if (urlConn.getResponseCode() == HTTP_200) {
		// 獲取返回的數據
		byte[] data = readStream(urlConn.getInputStream());
		Log.i(TAG_GET, "Get方式請求成功，返回數據如下：");
		Log.i(TAG_GET, new String(data, "UTF-8"));
	} else {
		Log.i(TAG_GET, "Get方式請求失敗");
	}
	// 關閉連接
	urlConn.disconnect();
}

 

Post方式：

// Post方式請求
public static void requestByPost() throws Throwable {
	String path = "https://reg.163.com/logins.jsp";
	// 請求的參數轉換爲byte數組
	String params = "id=" + URLEncoder.encode("helloworld", "UTF-8")
			+ "&pwd=" + URLEncoder.encode("android", "UTF-8");
	byte[] postData = params.getBytes();
	// 新建一個URL對象
	URL url = new URL(path);
	// 打開一個HttpURLConnection連接
	HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
	// 設置連接超時時間
	urlConn.setConnectTimeout(5 * 1000);
	// Post請求必須設置允許輸出
	urlConn.setDoOutput(true);
	// Post請求不能使用緩存
	urlConn.setUseCaches(false);
	// 設置爲Post請求
	urlConn.setRequestMethod("POST");
	urlConn.setInstanceFollowRedirects(true);
	// 配置請求Content-Type
	urlConn.setRequestProperty("Content-Type",
			"application/x-www-form-urlencode");
	// 開始連接
	urlConn.connect();
	// 發送請求參數
	DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream());
	dos.write(postData);
	dos.flush();
	dos.close();
	// 判斷請求是否成功
	if (urlConn.getResponseCode() == HTTP_200) {
		// 獲取返回的數據
		byte[] data = readStream(urlConn.getInputStream());
		Log.i(TAG_POST, "Post請求方式成功，返回數據如下：");
		Log.i(TAG_POST, new String(data, "UTF-8"));
	} else {
		Log.i(TAG_POST, "Post方式請求失敗");
	}
}

 

org.apache.http包中的HttpGet和HttpPost類

Get方式：

// HttpGet方式請求
public static void requestByHttpGet() throws Exception {
	String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
	// 新建HttpGet對象
	HttpGet httpGet = new HttpGet(path);
	// 獲取HttpClient對象
	HttpClient httpClient = new DefaultHttpClient();
	// 獲取HttpResponse實例
	HttpResponse httpResp = httpClient.execute(httpGet);
	// 判斷是夠請求成功
	if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
		// 獲取返回的數據
		String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
		Log.i(TAG_HTTPGET, "HttpGet方式請求成功，返回數據如下：");
		Log.i(TAG_HTTPGET, result);
	} else {
		Log.i(TAG_HTTPGET, "HttpGet方式請求失敗");
	}
}

 

Post方式：

 

// HttpPost方式請求
public static void requestByHttpPost() throws Exception {
	String path = "https://reg.163.com/logins.jsp";
	// 新建HttpPost對象
	HttpPost httpPost = new HttpPost(path);
	// Post參數
	List<NameValuePair> params = new ArrayList<NameValuePair>();
	params.add(new BasicNameValuePair("id", "helloworld"));
	params.add(new BasicNameValuePair("pwd", "android"));
	// 設置字符集
	HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);
	// 設置參數實體
	httpPost.setEntity(entity);
	// 獲取HttpClient對象
	HttpClient httpClient = new DefaultHttpClient();
	// 獲取HttpResponse實例
	HttpResponse httpResp = httpClient.execute(httpPost);
	// 判斷是夠請求成功
	if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
		// 獲取返回的數據
		String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
		Log.i(TAG_HTTPGET, "HttpPost方式請求成功，返回數據如下：");
		Log.i(TAG_HTTPGET, result);
	} else {
		Log.i(TAG_HTTPGET, "HttpPost方式請求失敗");
	}
}