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 =newURL("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 =newInputStreamReader(urlConn.getInputStream()); //获取服务器返回的东西

           // 为输出创建BufferedReader 

            BufferedReader buffer =newBufferedReader(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 =newURL("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 =newDataOutputStream(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 =newInputStreamReader(urlConn.getInputStream()); //获取服务器返回的东西

           // 为输出创建BufferedReader 

            BufferedReader buffer =newBufferedReader(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

              }