記錄四種常用網路請求方式的示例程式碼：

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物件  
    URL url = new URL(path);  
    // 開啟一個HttpURLConnection連線  
    HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();  
    // 設定連線超時時間  
 

    urlConn.setConnectTimeout(5 * 1000);  
    // 開始連線  
    urlConn.connect();  
    // 判斷請求是否成功  
    if (urlConn.getResponseCode() == HTTP_200) {  
        // 獲取返回的資料  
        byte[] data = readStream(urlConn.getInputStream());  
        Log.i(TAG_GET, "Get方式請求成功，返回資料如下：");  
        Log.i(TAG_GET, new String(data, "UTF-8"
 
));  
    } else {  
        Log.i(TAG_GET, "Get方式請求失敗");  
    }  
    // 關閉連線  
    urlConn.disconnect();  
}  

Post方式：

// Post方式請求  
public static void requestByPost() throws Throwable {  
    String path = "https://reg.163.com/logins.jsp";  
    // 請求的引數轉換為byte陣列  
    String params = "id=" + URLEncoder.encode("helloworld"
 
, "UTF-8")  
            + "&pwd=" + URLEncoder.encode("android", "UTF-8");  
    byte[] postData = params.getBytes();  
    // 新建一個URL物件  
    URL url = new URL(path);  
    // 開啟一個HttpURLConnection連線  
    HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();  
    // 設定連線超時時間  
    urlConn.setConnectTimeout(5 * 1000);  
    // Post請求必須設定允許輸出  
    urlConn.setDoOutput(true);  
    // Post請求不能使用快取  
    urlConn.setUseCaches(false);  
    // 設定為Post請求  
    urlConn.setRequestMethod("POST");  
    urlConn.setInstanceFollowRedirects(true);  
    // 配置請求Content-Type  
    urlConn.setRequestProperty("Content-Type",  
            "application/x-www-form-urlencode");  
    // 開始連線  
    urlConn.connect();  
    // 傳送請求引數  
    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) {  
        // 獲取返回的資料  
        byte[] data = readStream(urlConn.getInputStream());  
        Log.i(TAG_POST, "Post請求方式成功，返回資料如下：");  
        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物件  
    HttpGet httpGet = new HttpGet(path);  
    // 獲取HttpClient物件  
    HttpClient httpClient = new DefaultHttpClient();  
    // 獲取HttpResponse例項  
    HttpResponse httpResp = httpClient.execute(httpGet);  
    // 判斷是夠請求成功  
    if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {  
        // 獲取返回的資料  
        String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");  
        Log.i(TAG_HTTPGET, "HttpGet方式請求成功，返回資料如下：");  
        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物件  
    HttpPost httpPost = new HttpPost(path);  
    // Post引數  
    List<NameValuePair> params = new ArrayList<NameValuePair>();  
    params.add(new BasicNameValuePair("id", "helloworld"));  
    params.add(new BasicNameValuePair("pwd", "android"));  
    // 設定字符集  
    HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);  
    // 設定引數實體  
    httpPost.setEntity(entity);  
    // 獲取HttpClient物件  
    HttpClient httpClient = new DefaultHttpClient();  
    // 獲取HttpResponse例項  
    HttpResponse httpResp = httpClient.execute(httpPost);  
    // 判斷是夠請求成功  
    if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {  
        // 獲取返回的資料  
        String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");  
        Log.i(TAG_HTTPGET, "HttpPost方式請求成功，返回資料如下：");  
        Log.i(TAG_HTTPGET, result);  
    } else {  
        Log.i(TAG_HTTPGET, "HttpPost方式請求失敗");  
    }  
}