import Java.io.BufferedReader;  import java.io.DataOutputStream;  import java.io.IOException;  import java.io.InputStreamReader;  import java.io.UnsupportedEncodingException;  import java.net.HttpURLConnection;  import java.net.MalformedURLException;  import java.net.URL;  import net.sf.json.JSONObject;    public class AppAddTest {        public static final String ADD_URL = "www.2cto.com";        public static void appadd() {            try {              //创建连接              URL url = new URL(ADD_URL);              HttpURLConnection connection = (HttpURLConnection) url                      .openConnection();              connection.setDoOutput(true);              connection.setDoInput(true);              connection.setRequestMethod("POST");              connection.setUseCaches(false);              connection.setInstanceFollowRedirects(true);          //application/x-javascript text/xml->xml数据 application/x-javascript->json对象 application/x-www-form-urlencoded->表单数据 application/json;charset=utf-8 -> json数据              connection.setRequestProperty("Content-Type",                      "application/x-www-form-urlencoded");          connection.setRequestProperty("accept", "*/*");              connection.setRequestProperty("user-agent",                      "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");                connection.connect();                //POST请求              DataOutputStream out = new DataOutputStream(                      connection.getOutputStream());              JSONObject obj = new JSONObject();              obj.element("app_name", "asdf");              obj.element("app_ip", "10.21.243.234");              obj.element("app_port", 8080);              obj.element("app_type", "001");              obj.element("app_area", "asd");                out.writeBytes(obj.toString());              out.flush();              out.close();                //读取响应              BufferedReader reader = new BufferedReader(new InputStreamReader(                      connection.getInputStream()));              String lines;              StringBuffer sb = new StringBuffer("");              while ((lines = reader.readLine()) != null) {                  lines = new String(lines.getBytes(), "utf-8");                  sb.append(lines);              }              System.out.println(sb);              reader.close();              // 断开连接              connection.disconnect();          } catch (MalformedURLException e) {              // TODO Auto-generated catch block              e.printStackTrace();          } catch (UnsupportedEncodingException e) {              // TODO Auto-generated catch block              e.printStackTrace();          } catch (IOException e) {              // TODO Auto-generated catch block              e.printStackTrace();          }        }        public static void main(String[] args) {          appadd();      }    }