URL url = new URL("http://www.51cto.com/index.jsp?par=123456");
HttpURLConnection urlConn=(HttpURLConnection)url.openConnection(); 

//设置输入和输出流
urlConn.setDoOutput(true);
urlConn.setDoInput(true);
//设置请求方式为POST
urlConn.setRequestMethod("POST");
//POST请求不能使用缓存
urlConn.setUseCaches(false);
//关闭连接
urlConn.disConnection(); 

//使用HttpURLConnection打开连接
HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
//得到读取的内容(流)
InputStreamReader in = new InputStreamReader(urlConn.getInputStream());
// 为输出创建BufferedReader
BufferedReader buffer = new BufferedReader(in);
String inputLine = null;
//使用循环来读取获得的数据
while (((inputLine = buffer.readLine()) != null))
{  //我们在每一行后面加上一个"\n"来换行  resultData += inputLine + "\n";
}
//关闭InputStreamReader
in.close();
//关闭http连接
urlConn.disconnect(); 

        String httpUrl = "http://192.168.1.110:8080/httpget.jsp";  //获得的数据  String resultData = "";  URL url = null;  try {  //构造一个URL对象  url = new URL(httpUrl);   }  catch (MalformedURLException e)  {  Log.e(DEBUG_TAG, "MalformedURLException");  }  if (url != null)  {  try {  // 使用HttpURLConnection打开连接  HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();  //因为这个是post请求,设立需要设置为true  urlConn.setDoOutput(true);  urlConn.setDoInput(true);  // 设置以POST方式  urlConn.setRequestMethod("POST");  // Post 请求不能使用缓存  urlConn.setUseCaches(false);  urlConn.setInstanceFollowRedirects(true);  // 配置本次连接的Content-type，配置为application/x-www-form-urlencoded的  urlConn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");  // 连接，从postUrl.openConnection()至此的配置必须要在connect之前完成，  // 要注意的是connection.getOutputStream会隐含的进行connect。
                urlConn.connect();  //DataOutputStream流  DataOutputStream out = new DataOutputStream(urlConn.getOutputStream());  //要上传的参数  String content = "par=" + URLEncoder.encode("ABCDEFG", "gb2312");  //将要上传的内容写入流中
                out.writeBytes(content);   //刷新、关闭
                out.flush();  out.close();  

        // http地址  String httpUrl = "http://192.168.1.110:8080/httpget.jsp?par=HttpClient_android_Get";  //HttpGet连接对象  HttpGet httpRequest = new HttpGet(httpUrl);  //取得HttpClient对象  HttpClient httpclient = new DefaultHttpClient();  //请求HttpClient，取得HttpResponse  HttpResponse httpResponse = httpclient.execute(httpRequest);  //请求成功  if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK)  {  //取得返回的字符串  String strResult = EntityUtils.toString(httpResponse.getEntity());  mTextView.setText(strResult);  }  else {  mTextView.setText("请求错误!");  }  } 

// http地址  String httpUrl = "http://192.168.1.110:8080/httpget.jsp";  //HttpPost连接对象  HttpPost httpRequest = new HttpPost(httpUrl);  //使用NameValuePair来保存要传递的Post参数  List<NameValuePair> params = new ArrayList<NameValuePair>();  //添加要传递的参数  params.add(new BasicNameValuePair("par", "HttpClient_android_Post"));  //设置字符集  HttpEntity httpentity = new UrlEncodedFormEntity(params, "gb2312");  //请求httpRequest
            httpRequest.setEntity(httpentity);  //取得默认的HttpClient  HttpClient httpclient = new DefaultHttpClient();  //取得HttpResponse  HttpResponse httpResponse = httpclient.execute(httpRequest);  //HttpStatus.SC_OK表示连接成功  if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK)  {  //取得返回的字符串  String strResult = EntityUtils.toString(httpResponse.getEntity());  mTextView.setText(strResult);  }  else {  mTextView.setText("请求错误!");  }  }