package com.android.gson;

 import java.util.List;

 import java.util.Map;

 import com.android.gson.domain.Person;

 import com.android.gson.gsonTools.GsonTools;

 import com.android.gson.http.HttpUtils;

 import com.example.android_05json_gson.R;

 import android.app.Activity;

 import android.os.Bundle;

 import android.util.Log;

 import android.view.Menu;

 import android.view.MenuItem;

 import android.view.View;

 import android.view.View.OnClickListener;

 import android.widget.Button;

 public class MainActivity extends Activity implements OnClickListener{

     private Button person, persons, liststring, listmap;

     private static final String TAG = "MainActivity";

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         person = (Button) this.findViewById(R.id.person);

         persons = (Button) this.findViewById(R.id.persons);

         liststring = (Button) this.findViewById(R.id.liststring);

         listmap = (Button) this.findViewById(R.id.listmap);

         person.setOnClickListener(this);

         persons.setOnClickListener(this);

         liststring.setOnClickListener(this);

         listmap.setOnClickListener(this);

     }

     @Override

     public boolean onCreateOptionsMenu(Menu menu) {

         // Inflate the menu; this adds items to the action bar if it is present.

         getMenuInflater().inflate(R.menu.main, menu);

         return true;

     }

     @Override

     public boolean onOptionsItemSelected(MenuItem item) {

         // Handle action bar item clicks here. The action bar will

         // automatically handle clicks on the Home/Up button, so long

         // as you specify a parent activity in AndroidManifest.xml.

         int id = item.getItemId();

         if (id == R.id.action_settings) {

             return true;

         }

         return super.onOptionsItemSelected(item);

     }

     @Override

     public void onClick(View v) {

         // TODO Auto-generated method stub

         switch (v.getId()) {

         case R.id.person:

             String path = "http://122.206.79.193:8080/gsonProject/servlet/JsonAction?action_flag=person";

             String jsonString = HttpUtils.getJsonContent(path);

             Person person=GsonTools.getPerson(jsonString, Person.class);

             Log.i(TAG, person.toString());

             break;

         case R.id.persons:

             String path2 = "http://122.206.79.193:8080/gsonProject/servlet/JsonAction?action_flag=persons";

             String jsonString2 = HttpUtils.getJsonContent(path2);

             List<Person> list=GsonTools.getPersons(jsonString2, Person.class);

             Log.i(TAG, list.toString());

             break;

         case R.id.liststring:

             String path3 = "http://122.206.79.193:8080/gsonProject/servlet/JsonAction?action_flag=liststring";

             String jsonString3 = HttpUtils.getJsonContent(path3);

             List<String> list3=GsonTools.getList(jsonString3);

             Log.i(TAG, list3.toString());

             break;

         case R.id.listmap:

             String path4 = "http://122.206.79.193:8080/gsonProject/servlet/JsonAction?action_flag=listmap";

             String jsonString4 = HttpUtils.getJsonContent(path4);

             List<Map<String,Object>> list4=GsonTools.listKeyMaps(jsonString4);

             Log.i(TAG, list4.toString());

             break;

         }

     }

 }

返回List<Map<String, Object>>JJSON.parseObject(jsonString,new TypeReference<List<Map<String, Object>>>() {});

 package com.android.gson.fastJsonTools;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Map;

 import com.alibaba.fastjson.JSON;

 import com.alibaba.fastjson.TypeReference;

 ;

 public class FastJsonTools {

     public FastJsonTools() {

         // TODO Auto-generated constructor stub

     }

     /**

      * @param <T>

      * @param jsonString

      * @param cls

      * @return单条数据单个javabean

      */

     public static <T> T getPerson(String jsonString, Class<T> cls) {

         T t = null;

         try {

             t = JSON.parseObject(jsonString, cls);

         } catch (Exception e) {

             // TODO: handle exception

         }

         return t;

     }

     /**

      * 使用Gson进行解析 List<Person>

      *

      * @param <T>

      * @param jsonString

      * @param cls

      * @return

      */

     public static <T> List<T> getPersons(String jsonString, Class<T> cls) {

         List<T> list = new ArrayList<T>();

         try {

             list = JSON.parseArray(jsonString, cls);

         } catch (Exception e) {

         }

         return list;

     }

     public static List<Map<String, Object>> listKeyMaps(String jsonString) {

         List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

         try {

             list = JSON.parseObject(jsonString,

                     new TypeReference<List<Map<String, Object>>>() {

             });

         } catch (Exception e) {

             // TODO: handle exception

         }

         return list;

     }

 }

三种方式的对比：