Android http Communication

Android http Communication

* ** 1. Server Side
The simplest server receives the code and prints the data that passes through the two*

Package cn. servlet; import java. io. IOException; import javax. servlet. servletException; import javax. servlet. annotation. webServlet; import javax. servlet. http. httpServlet; import javax. servlet. http. httpServletRequest; import javax. servlet. http. httpServletResponse;/*** Servlet implementation class MyServlet */@ WebServlet ("/MyServlet") public class MyServlet extends HttpServlet {private static final long serialVersionUID = 1L; /*** @ see HttpServlet # HttpServlet () */public MyServlet () {super (); // TODO Auto-generated constructor stub}/*** @ see HttpServlet # doGet (HttpServletRequest request, response) */protected void doGet (HttpServletRequest request, response) throws ServletException, IOException {// TODO Auto-generated method stub // insist on calling the post method this. doPost (request, response);}/*** @ see HttpServlet # doPost (HttpServletRequest request, response) */protected void doPost (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub // obtain data String name = request. getParameter ("name"); String age = request. getParameter ("age"); // print the data System. out. println (name); System. out. println (age );}}

Sevlet

MyServlet
Cn. servlet. MyServlet


MyServlet
/Ss

2. Client
First, we define a thread.

Public class Thread1 extends Thread // the data comes from the layout text editing box String name; String age; String url; public Thread1 (String name, String age, String url) {this. name = name; this. age = age; this. url = url ;}

1) implementation of the get Method

Public void doGet () {try {// url = url + "? Name = "+ URLEncoder. encode (name, "UTF-8") + "& age =" + age; // convert to url object URL httpUrl = new URL (url ); // obtain the connection object HttpURLConnection conn = (HttpURLConnection) httpUrl. openConnection (); // sets the transmission method conn. setRequestMethod ("GET"); conn. setReadTimeout (5000); // read the input stream BufferedReader br = new BufferedReader (new InputStreamReader (conn. getInputStream (); String str; StringBuffer sb = new StringBuffer (); // put sb while (str = Br. readLine ())! = Null) {sb. append (str) ;}} catch (MalformedURLException e) {// TODO Auto-generated catch block e. printStackTrace ();} catch (IOException e) {// TODO Auto-generated catch block e. printStackTrace ();}}

2) implementation of the post method

Public void doPost () {try {URL httpUrl = new URL (url); HttpURLConnection conn = (HttpURLConnection) httpUrl. openConnection (); conn. setRequestMethod ("POST"); conn. setReadTimeout (5000); // note that conn is used here. getoutputstream, instead of new, can be associated with OutputStream out = conn. getOutputStream (); String content = "name =" + name + "& age =" + age; out. write (content. getBytes (); BufferedReader br = new BufferedReader (new InputStrea MReader (conn. getInputStream (); String str; StringBuffer sb = new StringBuffer (); while (str = br. readLine ())! = Null) {sb. append (str) ;}} catch (MalformedURLException e) {// TODO Auto-generated catch block e. printStackTrace ();} catch (IOException e) {// TODO Auto-generated catch block e. printStackTrace ();}}

Which method is executed in the run method uses the corresponding method

@Override    public void run() {        // TODO Auto-generated method stub        super.run();    doGet();//      doPost();    }

3) The layout of input data on the client is simply set to two edit text boxes and one button.

private EditText etName,etAge;    private Button btnReg;

4) button click events

BtnReg. setOnClickListener (new OnClickListener () {public void onClick (View arg0) {// TODO Auto-generated method stub // change the IP address to your current String url = "http: // 192.168.191.1: 8080/serve/ss "; new Thread1 (etName. getText (). toString (), etAge. getText (). toString (), url ). start ();}});}