send JSON servlet to android

Send Data Like this from Servlet

ArrayList<ModelClassDonateFood> al=new ArrayList();
       ModelClassDonateFood m;
           ResultSet rs=d.Select(sql);
           while(rs.next())
           {

               String id=rs.getString(1);
               String name=rs.getString(2);
               String gender=rs.getString(3);
               String age=rs.getString(4);
               String bldgrp=rs.getString(5);
               String disease=rs.getString(6);
               m=new ModelClassDonateFood(id, name, gender, bldgrp,disease,age);
               al.add(m);
           }

           String json=new Gson().toJson(al);
           response.getWriter().write(json);
           System.out.println("---------------------------------------->"+json);
       }catch(Exception e){

           System.out.println(e);

       }

ModelClassDonateFood Class

/**
 *
 * @author Ajith VM
 */
public class ModelClassDonateFood {
    private String fooditem;
    private String time;
    private String date;
    private String name;
     private String bloodgrp;
     private String age;

    public String getAge() {
        return age;
    }

    public ModelClassDonateFood(String fooditem, String time, String date, String name, String bloodgrp, String age) {
        this.fooditem = fooditem;
        this.time = time;
        this.date = date;
        this.name = name;
        this.bloodgrp = bloodgrp;
        this.age = age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    public ModelClassDonateFood(String fooditem, String time, String date, String name, String bloodgrp) {
        this.fooditem = fooditem;
        this.time = time;
        this.date = date;
        this.name = name;
        this.bloodgrp = bloodgrp;
    }

    public void setBloodgrp(String bloodgrp) {
        this.bloodgrp = bloodgrp;
    }

    public String getBloodgrp() {
        return bloodgrp;
    }

    public ModelClassDonateFood(String fooditem, String time, String date, String name) {
        this.fooditem = fooditem;
        this.time = time;
        this.date = date;
        this.name = name;
    }

    public String getFooditem() {
        return fooditem;
    }

    public String getTime() {
        return time;
    }

    public String getDate() {
        return date;
    }

    public String getName() {
        return name;
    }

    public void setFooditem(String fooditem) {
        this.fooditem = fooditem;
    }

    public void setTime(String time) {
        this.time = time;
    }

    public void setDate(String date) {
        this.date = date;
    }

    public void setName(String name) {
        this.name = name;
    }
        
}

Android Receve Like THis

public class ViewCriticalMembers extends AsyncTask<Void,Void,String> {
        String res="";
        int tmp;


        @Override
        protected String doInBackground(Void... voids) {
            try {
                DefaultHttpClient httpClient = new DefaultHttpClient();
                HttpGet httpGet = new HttpGet(uRl);
                HttpResponse httpResponse = httpClient.execute(httpGet);
                HttpEntity httpEntity = httpResponse.getEntity();
                res = EntityUtils.toString(httpEntity);
            }catch(Exception e)
            {
                System.out.print("................................................>"+e);

            }
            return res.trim();
        }

    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);
        if (s != null) {
            System.out.print(s);
            try {
                JSONArray jsonArray = new JSONArray(s.trim());
                if (jsonArray != null) {
                    for (int i = 0; i < jsonArray.length(); i++) {
                        JSONObject jsonObject = (JSONObject) jsonArray.get(i);
                        id = jsonObject.getString("fooditem");
                        name = jsonObject.getString("time");
                        age = jsonObject.getString("age");
                        gender=jsonObject.getString("date");
                        blood=jsonObject.getString("name");
                        diseace=jsonObject.getString("bloodgrp");
                        al.add(new ModelClass(id,name,age,gender,blood,diseace));
                    }
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
            CustomeAdaptor customeAdaptor=new CustomeAdaptor(al,getApplicationContext());
            ViewCriticalPatiants.setAdapter(customeAdaptor);

        } else {
            Log.e("JSON Data", "didnt receve any data from the server");
        }

    }
}