在android解析json

1、采用一般方式解释json为对象

 package com.heimazyh.testjson;

 import org.json.JSONException;
 import org.json.JSONObject;

 import com.heimazyh.http.Request;
 import com.heimazyh.http.Response;

 public class DoJson implements Response {

     @Override
     public void process(Object object) {
         // TODO Auto-generated method stub
         if(object != null){
             String str = (String) object;
             try {
                 JSONObject jsonObject = new JSONObject(str);
                 int id = jsonObject.getInt("id");
                 System.out.println("id=" + id);

                 String name = jsonObject.getString("name");
                 System.out.println("name=" + name);

                 String address = jsonObject.getString("address");
                 System.out.println("address=" + address);
             } catch (JSONException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }

     }

     @Override
     public Request getRequest() {
         // TODO Auto-generated method stub
         String path = "http://192.168.1.101/android/json/echojson.php";
         String method="get";
         Request request = new Request(path,method);
         return request;
     }

 }

2、采用一般方式解析json为List

 package com.heimazyh.testjson;

 import java.util.ArrayList;
 import java.util.List;

 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;

 import com.heimazyh.domain.Person;
 import com.heimazyh.http.Request;
 import com.heimazyh.http.Response;

 public class PersonsJson implements Response {

     @Override
     public void process(Object object) {
         // TODO Auto-generated method stub
         if(object != null){
             String str = (String) object;
             try {
                 List<Person> list = new ArrayList<Person>();
                 JSONArray jsonArray = new JSONArray(str);
                 for(int index=0; index < jsonArray.length(); index++){
                     JSONObject jsonObject = jsonArray.getJSONObject(index);
                     Person person = new Person();
                     person.setId(jsonObject.getInt("id"));
                     person.setName(jsonObject.getString("name"));
                     person.setAddress(jsonObject.getString("address"));
                     list.add(person);
                 }

                 for(int i=0; i < list.size(); i++){
                     Person person2 = list.get(i);
                     System.out.println(person2.toString());
                 }
             } catch (Exception e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }

     @Override
     public Request getRequest() {
         // TODO Auto-generated method stub
         String path = "http://192.168.1.101/android/json/persons.php";
         String method="get";
         Request request = new Request(path,method);
         return request;
     }

 }

3、采用一般方式解析json为map

 package com.heimazyh.testjson;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;

 import org.json.JSONArray;
 import org.json.JSONObject;

 import android.util.Log;

 import com.heimazyh.http.Request;
 import com.heimazyh.http.Response;

 public class MapJson implements Response {

     @Override
     public void process(Object object) {
         // TODO Auto-generated method stub
         if(object != null){
             String str = (String) object;
             try{
                 List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
                 JSONObject jsonObject = new JSONObject(str);
                 JSONArray jsonArray = jsonObject.getJSONArray("persons");
                 for(int i=0; i < jsonArray.length(); i++){
                     JSONObject jsonObject2 = jsonArray.getJSONObject(i);
                     Map<String, Object> map = new HashMap<String, Object>();
                     Iterator<String> iterator = jsonObject2.keys();
                     while(iterator.hasNext()){
                         String key = iterator.next();
                         Object value = jsonObject2.get(key);
                         if(key == null){
                             key = "";
                         }
                         map.put(key, value);
                     }
                     list.add(map);
                 }

                 Log.i("maptest", list.toString());
             }catch(Exception e){
                 e.printStackTrace();
             }
         }

     }

     @Override
     public Request getRequest() {
         // TODO Auto-generated method stub
         String path = "http://192.168.1.101/android/json/echomap.php";
         String method="get";
         Request request = new Request(path,method);
         return request;
     }

 }

4、使用gson进行解析

 package com.heimazyh.testjson;

 import com.google.gson.Gson;
 import com.heimazyh.domain.Person;
 import com.heimazyh.http.Request;
 import com.heimazyh.http.Response;

 public class GsonForPerson implements Response {

     @Override
     public void process(Object object) {
         // TODO Auto-generated method stub
         if(object != null){
             String str = (String) object;
             Gson gson = new Gson();
             Person person = gson.fromJson(str, Person.class);
             System.out.println(person.toString());
             System.out.println(person.getId());
             System.out.println(person.getName());
             System.out.println(person.getAddress());
         }

     }

     @Override
     public Request getRequest() {
         // TODO Auto-generated method stub
         String path = "http://192.168.1.100/android/json/echojson.php";
         String method="get";
         Request request = new Request(path,method);
         return request;
     }

 }

 package com.heimazyh.testjson;

 import java.lang.reflect.Type;
 import java.util.List;

 import com.google.gson.Gson;
 import com.google.gson.reflect.TypeToken;
 import com.heimazyh.domain.Person;
 import com.heimazyh.http.Request;
 import com.heimazyh.http.Response;

 public class GsonForPersons implements Response {

     @Override
     public void process(Object object) {
         // TODO Auto-generated method stub
         if(object != null){
             String str = (String) object;
             Gson gson = new Gson();
             Type type = new TypeToken<List<Person>>(){}.getType();
             List<Person> persons = gson.fromJson(str, type);
             for(Person person : persons){
                 System.out.println(person.toString());
                 System.out.println(person.getId());
                 System.out.println(person.getName());
                 System.out.println(person.getAddress());
             }
         }
     }

     @Override
     public Request getRequest() {
         // TODO Auto-generated method stub
         String path = "http://192.168.1.100/android/json/persons.php";
         String method="get";
         Request request = new Request(path,method);
         return request;
     }

 }