public static String createJsonString(String key, Object value) {
    JSONObject jsonObject = new JSONObject();
    jsonObject.put(key, value);
    return jsonObject.toString();
}

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 com.android.myjson.domain.Person;
/**
 * 完成对json数据的解析
 *
 */
public class JsonTools {
  public static Person getPerson(String key, String jsonString) {
    Person person = new Person();
    try {
      JSONObject jsonObject = new JSONObject(jsonString);
      JSONObject personObject = jsonObject.getJSONObject("person");
      person.setId(personObject.getInt("id"));
      person.setName(personObject.getString("name"));
      person.setAddress(personObject.getString("address"));
    } catch (Exception e) {
      // TODO: handle exception
    }
    return person;
  }
  public static List getPersons(String key, String jsonString) {
    List list = new ArrayList();
    try {
      JSONObject jsonObject = new JSONObject(jsonString);
      // 返回json的数组
      JSONArray jsonArray = jsonObject.getJSONArray(key);
      for (int i = 0; i < jsonArray.length(); i++) {
        JSONObject jsonObject2 = jsonArray.getJSONObject(i);
        Person person = new Person();
        person.setId(jsonObject2.getInt("id"));
        person.setName(jsonObject2.getString("name"));
        person.setAddress(jsonObject2.getString("address"));
        list.add(person);
      }
    } catch (Exception e) {
      // TODO: handle exception
    }
    return list;
  }
  public static List getList(String key, String jsonString) {
    List list = new ArrayList();
    try {
      JSONObject jsonObject = new JSONObject(jsonString);
      JSONArray jsonArray = jsonObject.getJSONArray(key);
      for (int i = 0; i < jsonArray.length(); i++) {
        String msg = jsonArray.getString(i);
        list.add(msg);
      }
    } catch (Exception e) {
      // TODO: handle exception
    }
    return list;
  }
  public static List> listKeyMaps(String key,
      String jsonString) {
    List> list = new ArrayList>();
    try {
      JSONObject jsonObject = new JSONObject(jsonString);
      JSONArray jsonArray = jsonObject.getJSONArray(key);
      for (int i = 0; i < jsonArray.length(); i++) {
        JSONObject jsonObject2 = jsonArray.getJSONObject(i);
        Map map = new HashMap();
        Iterator iterator = jsonObject2.keys();
        while (iterator.hasNext()) {
          String json_key = iterator.next();
          Object json_value = jsonObject2.get(json_key);
          if (json_value == null) {
            json_value = "";
          }
          map.put(json_key, json_value);
        }
        list.add(map);
      }
    } catch (Exception e) {
      // TODO: handle exception
    }
    return list;
  }
}

import com.google.gson.Gson;
public class JsonUtils {
  public static String createJsonObject(Object obj) {
    Gson gson = new Gson();
    String str = gson.toJson(obj);
    return str;
  }
}

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
;
public class GsonTools {
  public GsonTools() {
    // TODO Auto-generated constructor stub
  }
  /**
   * @param
   * @param jsonString
   * @param cls
   * @return
   */
  public static T getPerson(String jsonString, Class cls) {
    T t = null;
    try {
      Gson gson = new Gson();
      t = gson.fromJson(jsonString, cls);
    } catch (Exception e) {
      // TODO: handle exception
    }
    return t;
  }
  /**
   * 使用Gson进行解析 List
   *
   * @param
   * @param jsonString
   * @param cls
   * @return
   */
  public static List getPersons(String jsonString, Class cls) {
    List list = new ArrayList();
    try {
      Gson gson = new Gson();
      list = gson.fromJson(jsonString, new TypeToken>() {
      }.getType());
    } catch (Exception e) {
    }
    return list;
  }
  /**
   * @param jsonString
   * @return
   */
  public static List getList(String jsonString) {
    List list = new ArrayList();
    try {
      Gson gson = new Gson();
      list = gson.fromJson(jsonString, new TypeToken>() {
      }.getType());
    } catch (Exception e) {
      // TODO: handle exception
    }
    return list;
  }
  public static List> listKeyMaps(String jsonString) {
    List> list = new ArrayList>();
    try {
      Gson gson = new Gson();
      list = gson.fromJson(jsonString,
          new TypeToken>>() {
          }.getType());
    } catch (Exception e) {
      // TODO: handle exception
    }
    return list;
  }
}

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
public class JsonTool {
  public static T getPerson(String jsonstring, Class cls) {
    T t = null;
    try {
      t = JSON.parseObject(jsonstring, cls);
    } catch (Exception e) {
      // TODO: handle exception
    }
    return t;
  }
  public static List getPersonList(String jsonstring, Class cls) {
    List list = new ArrayList();
    try {
      list = JSON.parseArray(jsonstring, cls);
    } catch (Exception e) {
      // TODO: handle exception
    }
    return list;
  }
  public static List> getPersonListMap1(
      String jsonstring) {
    List> list = new ArrayList>();
    try {
      list = JSON.parseObject(jsonstring,
          new TypeReference>>() {
          }.getType());
    } catch (Exception e) {
      // TODO: handle exception
    }
    return list;
  }
}