android HttpURLConnection

Android中提供的HttpURLConnection和HttpClient接口可以用来开发HTTP程序。

下面要说的是HttpURLConnection ，HttpURLConnection 有两种方式：

get和post

//HttpURLConnection get

               try {

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

                      //使用HttpURLConnection打开连接 

                     HttpURLConnection urlConn=(HttpURLConnection)url.openConnection(); //去服务器求请

                     urlConn.setConnectTimeout(5*1000);

                      //设置输入和输出流 

                     urlConn.setDoOutput( true); 

                     urlConn.setDoInput( true);

                     

            //得到读取的内容(流) 

            InputStreamReader in = new InputStreamReader(urlConn.getInputStream());  //获取服务器返回的东西

            // 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();

              } catch (Exception e) {

                      // TODO: handle exception

              }

//HttpURLConnection post

               try {

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

                      //使用HttpURLConnection打开连接 

                     HttpURLConnection urlConn=(HttpURLConnection)url.openConnection(); //去服务器求请

                     urlConn.setConnectTimeout(5*1000);

                      //设置输入和输出流 

                     urlConn.setDoOutput( true); 

                     urlConn.setDoInput( true);

                     urlConn.setRequestMethod( "POST");

                     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 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();

                     

            //得到读取的内容(流) 

            InputStreamReader in = new InputStreamReader(urlConn.getInputStream());  //获取服务器返回的东西

            // 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();

              } catch (Exception e) {

                      // TODO: handle exception

              }