android 网络请求get,post实现

HttpURLConnection

// 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（注意：这个设置有时返回的是html格式，而不是json格式，遇到则不用设置）

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");

}

org.apache.http包中的HttpGet和HttpPost类

// 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");

}

// 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 params =new ArrayList();

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");

}

// 获取连接返回的数据

private static byte[] readStream(InputStreaminputStream) throws Exception {

byte[]buffer = new byte[1024];

intlen = -1;

ByteArrayOutputStream baos =new ByteArrayOutputStream();

while ((len =inputStream.read(buffer)) != -1) {

baos.write(buffer, 0,len);

}

byte[]data = baos.toByteArray();

inputStream.close();

baos.close();

returndata;

}

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