JSON数据解析

package com.diysoul.json.fastjson;

import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.TypeReference;

public class JsonUtil {

    public JsonUtil() {
    }

    public static String createJson(Object object) {
        try {        
            return JSONObject.toJSONString(object);
        } catch (Exception e) {
        }
        return "";
    }

    public static String createJson(List<Object> object) {
        try {        
            return JSONObject.toJSONString(object);
        } catch (Exception e) {
        }
        return "";
    }

    public static <T> T getObject(String jsonString, Class<T> klass) {
        try {
            T Object = (T) JSONObject.parseObject(jsonString, klass);
            return Object;
        } catch (Exception e) {
            return null;
        }
    }

    public static <T> List<T> getObjects(String jsonString, Class<T> klass) {
        try {
            List<T> list = JSONObject.parseArray(jsonString, klass);
            return list;
        } catch (Exception e) {
            return null;
        }
    }

    public static <T> List<T> getObjects(String jsonString) {
        try {
            TypeReference<List<T>> typeReference = new TypeReference<List<T>>() {
            };
            List<T> list = JSONObject.parseObject(jsonString, typeReference);
            return list;
        } catch (Exception e) {
            return null;
        }
    }

    public static <K, V> List<Map<K, V>> getMaps(String jsonString) {
        try {
            TypeReference<List<Map<K, V>>> typeReference = new TypeReference<List<Map<K, V>>>() {
            };
            List<Map<K, V>> list = JSONObject.parseObject(jsonString, typeReference);
            return list;
        } catch (Exception e) {
            return null;
        }
    }
}

package com.android.mygson.gson;

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 <T>
     * @param jsonString
     * @param cls
     * @return
     */
    public static <T> T getPerson(String jsonString, Class<T> 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<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 {
            Gson gson = new Gson();
            list = gson.fromJson(jsonString, new TypeToken<List<T>>() {
            }.getType());
        } catch (Exception e) {
        }
        return list;
    }

    /**
     * @param jsonString
     * @return
     */
    public static List<String> getList(String jsonString) {
        List<String> list = new ArrayList<String>();
        try {
            Gson gson = new Gson();
            list = gson.fromJson(jsonString, new TypeToken<List<String>>() {
            }.getType());
        } catch (Exception e) {
            // TODO: handle exception
        }
        return list;
    }

    public static List<Map<String, Object>> listKeyMaps(String jsonString) {
        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
        try {
            Gson gson = new Gson();
            list = gson.fromJson(jsonString,
                    new TypeToken<List<Map<String, Object>>>() {
                    }.getType());
        } catch (Exception e) {
            // TODO: handle exception
        }
        return list;
    }

　　　　/**
　　　　* @param object
　　　　* 是对解析的集合的类型
　　　　* @return
　　　　*/
　　　　public static String createJsonString(Object value) {
　　　　　　Gson gson = new Gson();
　　　　　　String str = gson.toJson(value);
　　　　　　return str;
　　　　}

}

package com.android.myjson.json;

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
 * 
 * @author jack
 * 
 */
public class JsonTools {

    public JsonTools() {
        // TODO Auto-generated constructor stub
    }

    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<Person> getPersons(String key, String jsonString) {
        List<Person> list = new ArrayList<Person>();
        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<String> getList(String key, String jsonString) {
        List<String> list = new ArrayList<String>();
        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<Map<String, Object>> listKeyMaps(String key,
            String jsonString) {
        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
        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<String, Object> map = new HashMap<String, Object>();
                Iterator<String> 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;
    }
　　
　　/**
　　* @param key
　　* 表示json字符串的头信息
　　* @param object
　　* 是对解析的集合的类型
　　* @return
　　*/
　　public static String createJsonString(String key, Object value) {
　　　　JSONObject jsonObject = new JSONObject();
　　　　jsonObject.put(key, value);
　　　　return jsonObject.toString();
　　}
}