Android客户端与服务器端交互方式总结

一、HttpClient 方式：

//第一步：创建一个客户端实例
HttpClient httpClient = new DefaultHttpClient();
//第二步：创建Http请求
HttpPost  httpRequest = new HttpPost(url);
//第三步： Entity作为Http的request报文的一部分进行传输
httpRequest.setEntity(new UrlEncodedFormEntity( nameValuePair ));
//第四步：发送http的请求request，并接受服务器返回的response
HttpResponse response=httpClient.execute(httpRequest);

//第五步： 根据返回状态码，若成功（200）则获取Entity，若失败，则返回
if(httpResponse.getStatusLine().getStatusCode()==HttpStatus.SC_OK)
result=EntityUtils.toString(httpResponse.getEntity(), HTTP.UTF_8);
else
result="登陆失败！";

二、HttpURLConnection方式

URL url = new URL("http://www.android.com/");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
try {
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
readStream(in);
finally {
urlConnection.disconnect();
}
}