Android开发之与服务器（jsp）发送、接受JSON数据

Android端向服务器端发送JSON数据。服务器接受到数据后返回JSON信息。

Android效果图：

Android开发之与服务器（jsp）发送、接受JSON数据_第1张图片

未点击“发送” 点击“发送”，获取数据

服务端效果图：

Android开发之与服务器（jsp）发送、接受JSON数据_第3张图片

android代码：

public class MainActivity extends AppCompatActivity {    //地址，请根据自己的地址设置    public final static String MyURL = "http://192.168.1.100:8080/JsonDeal/Deal";    private Button but;    private TextView tv;    private JSONObject object;    Handler handler;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        handler = new Handler();        but = (Button) this.findViewById(R.id.but);        tv = (TextView) this.findViewById(R.id.tv);        try {            object = new JSONObject();            object.put("client", "我是客户端来的");        } catch (JSONException e) {            e.printStackTrace();        }        but.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                new Thread() {                    @Override                    public void run() {                        super.run();                        submit();                    }                }.start();            }        });    }    public void submit() {        try {            URL url = new URL(MyURL);            HttpURLConnection conn = (HttpURLConnection) url.openConnection();            conn.setRequestMethod("POST");            conn.setRequestProperty("ser-Agent", "Fiddler");            conn.setRequestProperty("Content-Type", "application/json");            conn.setConnectTimeout(5 * 1000);            // 包装并上传数据            OutputStream outputStream = conn.getOutputStream();            outputStream.write(URLEncoder.encode(object.toString(), "UTF-8").getBytes());            // 如果请求响应码是200，则表示成功            if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {                //获取服务器上的数据                BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));                try {                    //解码                    String jsonStr = URLDecoder.decode(in.readLine(), "UTF-8");                    final JSONObject objectT = new JSONObject(jsonStr);                    Log.i("objectT", objectT.getString("server"));                    //更新TextView组件                    handler.post(new Runnable() {                        @Override                        public void run() {                            try {                                tv.setText(objectT.getString("server"));                            } catch (JSONException e) {                                e.printStackTrace();                            }                        }                    });                } catch (JSONException e) {                    e.printStackTrace();                }                in.close();                conn.disconnect();            }        } catch (MalformedURLException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (ProtocolException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }catch (SocketTimeoutException e) {            handler.post(new Runnable() {                @Override                public void run() {                    Toast.makeText(MainActivity.this, "连接超时", Toast.LENGTH_SHORT).show();                    return;                }            });        }catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}

服务器代码（jsp）

Deal.java

public class Deal extends HttpServlet {public Deal() {super();}public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here}public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {request.setCharacterEncoding("utf-8");//获取数据InputStream inputStream = request.getInputStream();String json = NetUtils.readString(inputStream);json = URLDecoder.decode(json, "UTF-8");JSONObject jsonT = JSONObject.fromObject(json);System.out.println(jsonT.getString("client"));JSONObject jsonObject = new JSONObject();jsonObject.put("server", "我从服务器来");String serverStr = URLEncoder.encode(jsonObject.toString(), "UTF-8");//发送数据PrintWriter printWriter = response.getWriter();printWriter.write(serverStr);}public void init() throws ServletException {// Put your code here}}

NetUtils.java

import java.io.ByteArrayOutputStream;import java.io.InputStream;public class NetUtils {public static byte[] readBytes(InputStream is) {try {byte[] buffer = new byte[1024];int len = -1;ByteArrayOutputStream baos = new ByteArrayOutputStream();while ((len = is.read(buffer)) != -1) {baos.write(buffer, 0, len);}baos.close();return baos.toByteArray();} catch (Exception e) {e.printStackTrace();}return null;}public static String readString(InputStream is) {return new String(readBytes(is));}}

源码：

android源码（android studio）和jsp源码

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