在android解析json

时间：2023-03-09 02:41:23
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;

     }

 }

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