Android中的几种网络请求方式

java.net包中的HttpURLConnection类

Get方式：

// Get方式请求  
public static void requestByGet() throws Exception { 
    String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android"; 
    // 新建一个URL对象  
    URL url = new URL(path); 
    // 打开一个HttpURLConnection连接  
    HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); 
    // 设置连接超时时间  
    urlConn.setConnectTimeout(5 * 1000); 
    // 开始连接  
    urlConn.connect(); 
    // 判断请求是否成功  
    if (urlConn.getResponseCode() == HTTP_200) { 
        // 获取返回的数据  
        byte[] data = readStream(urlConn.getInputStream()); 
        Log.i(TAG_GET, "Get方式请求成功，返回数据如下："); 
        Log.i(TAG_GET, new String(data, "UTF-8")); 
    } else { 
        Log.i(TAG_GET, "Get方式请求失败"); 
    } 
    // 关闭连接  
    urlConn.disconnect(); 
} 

Post方式：
// Post方式请求  
public static void requestByPost() throws Throwable { 
    String path = "https://reg.163.com/logins.jsp"; 
    // 请求的参数转换为byte数组  
    String params = "id=" + URLEncoder.encode("helloworld", "UTF-8") 
            + "&pwd=" + URLEncoder.encode("android", "UTF-8"); 
    byte[] postData = params.getBytes(); 
    // 新建一个URL对象  
    URL url = new URL(path); 
    // 打开一个HttpURLConnection连接  
    HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); 
    // 设置连接超时时间  
    urlConn.setConnectTimeout(5 * 1000); 
    // Post请求必须设置允许输出  
    urlConn.setDoOutput(true); 
    // Post请求不能使用缓存  
    urlConn.setUseCaches(false); 
    // 设置为Post请求  
    urlConn.setRequestMethod("POST"); 
    urlConn.setInstanceFollowRedirects(true); 
    // 配置请求Content-Type  
    urlConn.setRequestProperty("Content-Type", 
            "application/x-www-form-urlencode"); 
    // 开始连接  
    urlConn.connect(); 
    // 发送请求参数  
    DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream()); 
    dos.write(postData); 
    dos.flush(); 
    dos.close(); 
    // 判断请求是否成功  
    if (urlConn.getResponseCode() == HTTP_200) { 
        // 获取返回的数据  
        byte[] data = readStream(urlConn.getInputStream()); 
        Log.i(TAG_POST, "Post请求方式成功，返回数据如下："); 
        Log.i(TAG_POST, new String(data, "UTF-8")); 
    } else { 
        Log.i(TAG_POST, "Post方式请求失败"); 
    } 
} 

二.   org.apache.http包中的HttpGet和HttpPost类

Get方式：

// HttpGet方式请求  
public static void requestByHttpGet() throws Exception { 
    String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android"; 
    // 新建HttpGet对象  
    HttpGet httpGet = new HttpGet(path); 
    // 获取HttpClient对象  
    HttpClient httpClient = new DefaultHttpClient(); 
    // 获取HttpResponse实例  
    HttpResponse httpResp = httpClient.execute(httpGet); 
    // 判断是够请求成功  
    if (httpResp.getStatusLine().getStatusCode() == HTTP_200) { 
        // 获取返回的数据  
        String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8"); 
        Log.i(TAG_HTTPGET, "HttpGet方式请求成功，返回数据如下："); 
        Log.i(TAG_HTTPGET, result); 
    } else { 
        Log.i(TAG_HTTPGET, "HttpGet方式请求失败"); 
    } 
} 

Post方式：

// HttpPost方式请求  
public static void requestByHttpPost() throws Exception { 
    String path = "https://reg.163.com/logins.jsp"; 
    // 新建HttpPost对象  
    HttpPost httpPost = new HttpPost(path); 
    // Post参数  
    List<NameValuePair> params = new ArrayList<NameValuePair>(); 
    params.add(new BasicNameValuePair("id", "helloworld")); 
    params.add(new BasicNameValuePair("pwd", "android")); 
    // 设置字符集  
    HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8); 
    // 设置参数实体  
    httpPost.setEntity(entity); 
    // 获取HttpClient对象  
    HttpClient httpClient = new DefaultHttpClient(); 
    // 获取HttpResponse实例  
    HttpResponse httpResp = httpClient.execute(httpPost); 
    // 判断是够请求成功  
    if (httpResp.getStatusLine().getStatusCode() == HTTP_200) { 
        // 获取返回的数据  
        String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8"); 
        Log.i(TAG_HTTPGET, "HttpPost方式请求成功，返回数据如下："); 
        Log.i(TAG_HTTPGET, result); 
    } else { 
        Log.i(TAG_HTTPGET, "HttpPost方式请求失败"); 
    } 
}