Android网络编程之Http通信

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

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

1.  //使用HttpURLConnection打开连接  
2.HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();  
3.  //得到读取的内容(流)  
4.InputStreamReader in = new InputStreamReader(urlConn.getInputStream());  
5.  // 为输出创建BufferedReader  
6.  BufferedReader buffer = new BufferedReader(in); 7.  String inputLine = null;  
8.  //使用循环来读取获得的数据  
9.  while (((inputLine = buffer.readLine()) != null))  
10.  {  
11.  //我们在每一行后面加上一个"
"来换行  
12.  resultData += inputLine + "
";  
13.  }           
14.  //关闭InputStreamReader  
15.  in.close();  
16.  //关闭http连接  
17.  urlConn.disconnect(); 

1.String httpUrl = "http://192.168.1.110:8080/httpget.jsp";  
2.  //获得的数据  
3.  String resultData = "";  
4.  URL url = null;  
5.  try 
6.  {  
7.  //构造一个URL对象  
8.  url = new URL(httpUrl);   
9.  }  
10.  catch (MalformedURLException e)  
11.  {  
12.  Log.e(DEBUG_TAG, "MalformedURLException");  
13.  }  
14.  if (url != null)  
15.  {  
16.  try 
17.  {  
18.  // 使用HttpURLConnection打开连接  
19.  HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();  
20.  //因为这个是post请求,设立需要设置为true  
21.  urlConn.setDoOutput(true);  
22.  urlConn.setDoInput(true);  
23.  // 设置以POST方式  
24.  urlConn.setRequestMethod("POST");  
25.  // Post 请求不能使用缓存  
26.  urlConn.setUseCaches(false);  
27.  urlConn.setInstanceFollowRedirects(true);  
28.  // 配置本次连接的Content-type，配置为application/x-www-form-urlencoded的  
29.  urlConn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");  
30.  // 连接，从postUrl.openConnection()至此的配置必须要在connect之前完成，  
31.  // 要注意的是connection.getOutputStream会隐含的进行connect。  
32.  urlConn.connect();  
33.  //DataOutputStream流  
34.DataOutputStream out = new DataOutputStream(urlConn.getOutputStream());  
35.  //要上传的参数  
36.String content = "par=" + URLEncoder.encode("ABCDEFG", "gb2312");  
37.  //将要上传的内容写入流中  
38.  out.writeBytes(content);   
39.  //刷新、关闭  
40.  out.flush();  
41.  out.close();  

1.  // http地址  
2.String httpUrl = "http://192.168.1.110:8080/httpget.jsp?par=HttpClient_android_Get";  
3.  //HttpGet连接对象  
4.  HttpGet httpRequest = new HttpGet(httpUrl);  
5.  //取得HttpClient对象  
6.  HttpClient httpclient = new DefaultHttpClient();  
7.  //请求HttpClient，取得HttpResponse  
8.HttpResponse httpResponse = httpclient.execute(httpRequest);  
9.  //请求成功  
10.
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK)  
11.  {  
12.  //取得返回的字符串  
13.  String strResult = EntityUtils.toString(httpResponse.getEntity());  
14.  mTextView.setText(strResult);  
15.  }  
16.  else 
17.  {  
18.  mTextView.setText("请求错误!");  
19.  }  
20.  } 

1.  // http地址  
2.  String httpUrl = "http://192.168.1.110:8080/httpget.jsp";  
3.  //HttpPost连接对象  
4.  HttpPost httpRequest = new HttpPost(httpUrl);  
5.  //使用NameValuePair来保存要传递的Post参数  
6.  List<NameValuePair> params = new ArrayList<NameValuePair>();  
7.  //添加要传递的参数  
8.  params.add(new BasicNameValuePair("par", "HttpClient_android_Post"));  
9.  //设置字符集  
10.  HttpEntity httpentity = new UrlEncodedFormEntity(params, "gb2312");  
11.  //请求httpRequest  
12.  httpRequest.setEntity(httpentity);  
13.  //取得默认的HttpClient  
14.  HttpClient httpclient = new DefaultHttpClient();  
15.  //取得HttpResponse  
16.  HttpResponse httpResponse = httpclient.execute(httpRequest);  
17.  //HttpStatus.SC_OK表示连接成功  
18.
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK)  
19.  {  
20.  //取得返回的字符串  
21.  String strResult = EntityUtils.toString(httpResponse.getEntity());  
22.  mTextView.setText(strResult);  
23.  }  
24.  else 
25.  {  
26.  mTextView.setText("请求错误!");  
27.  }  
28.  }