android使用JSON数据和服务器进行交互

//点击按钮发送反馈信息给服务端，成功则进入优惠券界面

        Button upload = (Button) findViewById(R.id.upload);
        final String finalLatitude = latitude;
        final String finalLongitude = longitude;
        upload.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                //获得建筑物名称
                building=(EditText) findViewById(R.id.buildingInput);
                final String buildingInput = building.getText().toString();

                //获得楼层号
                floor = (EditText)findViewById(R.id.floorInput);
                final String floorInput = floor.getText().toString();

                //获得手机号
                telephone=(EditText)findViewById(R.id.telInput);
                final String telInput = telephone.getText().toString();

                //获得描述
                description=(EditText)findViewById(R.id.descripInput);
                final String descripInput = description.getText().toString();

                if (buildingInput.length() <= 0
                        || floorInput.length() <= 0
                        || telInput.length() <= 0
                        || descripInput.length() <= 0)
                {
                    Toast.makeText(Feedback.this, "请完成反馈信息的填写", 

Toast.LENGTH_LONG).show();
                }
                else{
                    new Thread() {
                        public void run() {
                            Looper.prepare();
                            final String urlPath = "http://10.8.176.105:8080/QRCodeAdmin

/commAction.action";
                            URL url;

                            try {
                                url = new URL(urlPath);

                                JSONObject feedbackInfo = new JSONObject();
                                feedbackInfo.put("building", buildingInput);
                                feedbackInfo.put("floor", floorInput);
                                feedbackInfo.put("telephone", telInput);
                                feedbackInfo.put("description", descripInput);
                                feedbackInfo.put("latitude", finalLatitude);
                                feedbackInfo.put("longitude", finalLongitude);

                                /**
                                 *
                                 * 封装feedback数组
                                 使用JsonObject封装
                                 {"building":"","floor":"","telephone":"","description":"",
                                 "latitude":"","longitude":""}
                                 */
                                //将JSON数组转换成String类型使用输出流向服务器写
                                String content = String.valueOf(feedbackInfo);

                                //输出
                                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                                conn.setConnectTimeout(5000);
                                conn.setDoOutput(true);//允许输出
                                conn.setRequestMethod("POST");//post方式输出
                                conn.setRequestProperty("Content-Type", "application/json");
                                OutputStream os = conn.getOutputStream();
                                os.write(content.getBytes());
                                os.close();

                                if (conn.getResponseCode() == 200) {
                                    //传回信息，信息应当为优惠券的信息
                                    InputStream is = conn.getInputStream();

                                    //下面的Json数据是{"id":"","path":""}的string形式
                                    String json = NetUtils.readString(is);
                                    awardBean award = new awardBean();
                                    JSONObject jsonObject = new JSONObject(json);

                                    //获得award的id和path
                                    String id = jsonObject.getString("id");
                                    String path = jsonObject.getString("path");

                                    //将获得的优惠券信息发送给award界面
                                    Intent intent1 = new Intent(Feedback.this, Award.class);
                                    intent1.putExtra("id", id);
                                    intent1.putExtra("path", path);
                                    startActivity(intent1);
                                } else {
                                    Toast.makeText(Feedback.this, "发送失败", 

Toast.LENGTH_SHORT).show();
                                }
                            } catch (JSONException e) {
                                Toast.makeText(Feedback.this, "发送失败",

 Toast.LENGTH_SHORT).show();
                            } catch (MalformedURLException e) {
                                Toast.makeText(Feedback.this, "发送失败", 

Toast.LENGTH_SHORT).show();
                            } catch (IOException e) {
                                Toast.makeText(Feedback.this, "发送失败", 

Toast.LENGTH_SHORT).show();
                            }
                        }
                    }.start();
                }
            }

        });

下面是awardBean（我也不知道这个bean写的是不是必要）：

package com.example.euphemiaxiao.feedback;

import java.io.Serializable;
/**
 * Created by Euphemia Xiao on 2017/7/13.
 */

public class awardBean implements Serializable{
    public String path;
    public String id;

    public awardBean()
    {
        this.path = path;
        this.id=id;
    }
    public String getPath()
    {
        return path;
    }

    public String getId()
    {
        return id;
    }
}

NetUtils是一个工具类：

package com.example.euphemiaxiao.feedback;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

/**
 * Created by Euphemia Xiao on 2017/7/4.
 */

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));
    }
}

P.S.另一种接收（上面的接收是接收一条信息{"award":{"id":"","path":""}}，下面的接收是接收一组信息{{"student":{"studentID":"","name":""}}{"student":{"studentID":"","name":""}}{"student":{"studentID":"","name":""}}...}）

JSONArray actArray = jsonObject.getJSONArray("student");

                for (int i = 0; i < actArray.length(); i++) {
                    //获得JSON数组中的每一个JSONObject对象
                    JSONObject actObject = actArray.getJSONObject(i);
                    String stuID=actObject.getString("studentID");
                    studentID.add(stuID);
                    String stuName = actObject.getString("name");
                    //studentName.add(stuName);
                    studentInfo.add(stuID+" "+stuName);
                }

再P.S.获得一个json数据，前端对其进行处理，获取key和value

var obj = {"abc":"123"};
for(var key in obj) {
console.log(key+"+"obj[key])}

输出结果为abc+123