JAVAでのJSONUTilsツール類のパッケージング及び使用

10391 ワード

JSONObjectおよびJSOnArrayベースクラスは、JAVAでjson-lib-2.3-jdk 15.jarパッケージで提供され、JSONのシーケンス化および逆シーケンス化の操作に使用されます.しかし、私たちはそれをさらにカプセル化し、より良い再利用を達成することに慣れています.
パッケージされたJSONツール類JSOONUTils.javaコードは以下の通りです.
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import org.apache.commons.beanutils.BeanUtils;

public class JSONUtils
{
    /**
     * 
     * @author wangwei JSON   
     * @param 
     * 
     */
    
    /***
     *  List      JSON  
     */
    public static  String toJSONString(List list)
    {
        JSONArray jsonArray = JSONArray.fromObject(list);

        return jsonArray.toString();
    }
    
    /***
     *        JSON  
     * @param object
     * @return
     */
    public static String toJSONString(Object object)
    {
        JSONArray jsonArray = JSONArray.fromObject(object);

        return jsonArray.toString();
    }

    /***
     *  JSON        JSON  
     * @param jsonArray
     * @return
     */
    public static String toJSONString(JSONArray jsonArray)
    {
        return jsonArray.toString();
    }

    /***
     *  JSON      JSON  
     * @param jsonObject
     * @return
     */
    public static String toJSONString(JSONObject jsonObject)
    {
        return jsonObject.toString();
    } 
    
    /***
     *       List  
     * @param object
     * @return
     */
    public static List toArrayList(Object object)
    {
        List arrayList = new ArrayList();

        JSONArray jsonArray = JSONArray.fromObject(object);

        Iterator it = jsonArray.iterator();
        while (it.hasNext())
        {
            JSONObject jsonObject = (JSONObject) it.next();

            Iterator keys = jsonObject.keys();
            while (keys.hasNext())
            {
                Object key = keys.next();
                Object value = jsonObject.get(key);
                arrayList.add(value);
            }
        }

        return arrayList;
    }

    /***
     *       Collection  
     * @param object
     * @return
     */
    public static Collection toCollection(Object object)
    {
        JSONArray jsonArray = JSONArray.fromObject(object);

        return JSONArray.toCollection(jsonArray);
    }

    /***
     *       JSON    
     * @param object
     * @return
     */
    public static JSONArray toJSONArray(Object object)
    {
        return JSONArray.fromObject(object);
    }

    /***
     *       JSON  
     * @param object
     * @return
     */
    public static JSONObject toJSONObject(Object object)
    {
        return JSONObject.fromObject(object);
    }

    /***
     *       HashMap
     * @param object
     * @return
     */
    public static HashMap toHashMap(Object object)
    {
        HashMap data = new HashMap();
        JSONObject jsonObject = JSONUtils.toJSONObject(object);
        Iterator it = jsonObject.keys();
        while (it.hasNext())
        {
            String key = String.valueOf(it.next());
            Object value = jsonObject.get(key);
            data.put(key, value);
        }

        return data;
    }

    /***
     *       List>
     * @param object
     * @return
     */
    //        (Map) List
    public static List> toList(Object object)
    {
        List> list = new ArrayList>();
        JSONArray jsonArray = JSONArray.fromObject(object);
        for (Object obj : jsonArray)
        {
            JSONObject jsonObject = (JSONObject) obj;
            Map map = new HashMap();
            Iterator it = jsonObject.keys();
            while (it.hasNext())
            {
                String key = (String) it.next();
                Object value = jsonObject.get(key);
                map.put((String) key, value);
            }
            list.add(map);
        }
        return list;
    }

    /***
     *  JSON            List
     * @param 
     * @param jsonArray
     * @param objectClass
     * @return
     */
    public static  List toList(JSONArray jsonArray, Class objectClass)
    {
        return JSONArray.toList(jsonArray, objectClass);
    }

    /***
     *            List
     * @param 
     * @param jsonArray
     * @param objectClass
     * @return
     */
    public static  List toList(Object object, Class objectClass)
    {
        JSONArray jsonArray = JSONArray.fromObject(object);

        return JSONArray.toList(jsonArray, objectClass);
    }

    /***
     *  JSON            
     * @param 
     * @param jsonObject
     * @param beanClass
     * @return
     */
    public static  T toBean(JSONObject jsonObject, Class beanClass)
    {
        return (T) JSONObject.toBean(jsonObject, beanClass);
    }

    /***
     *               
     * @param 
     * @param object
     * @param beanClass
     * @return
     */
    public static  T toBean(Object object, Class beanClass)
    {
        JSONObject jsonObject = JSONObject.fromObject(object);

        return (T) JSONObject.toBean(jsonObject, beanClass);
    }

    /***
     *  JSON              
     * @param    T        
     * @param    D        
     * @param jsonString JSON  
     * @param mainClass      
     * @param detailName                
     * @param detailClass      
     * @return
     */
    public static  T toBean(String jsonString, Class mainClass,
            String detailName, Class detailClass)
    {
        JSONObject jsonObject = JSONObject.fromObject(jsonString);
        JSONArray jsonArray = (JSONArray) jsonObject.get(detailName);

        T mainEntity = JSONUtils.toBean(jsonObject, mainClass);
        List detailList = JSONUtils.toList(jsonArray, detailClass);

        try
        {
            BeanUtils.setProperty(mainEntity, detailName, detailList);
        }
        catch (Exception ex)
        {
            throw new RuntimeException("    JSON        !");
        }

        return mainEntity;
    }

    /***
     *  JSON              
     * @param   T        
     * @param   D1        
     * @param   D2        
     * @param jsonString JSON  
     * @param mainClass      
     * @param detailName1              
     * @param detailClass1      
     * @param detailName2              
     * @param detailClass2      
     * @return
     */
    public static  T toBean(String jsonString, Class mainClass,
            String detailName1, Class detailClass1, String detailName2,
            Class detailClass2)
    {
        JSONObject jsonObject = JSONObject.fromObject(jsonString);
        JSONArray jsonArray1 = (JSONArray) jsonObject.get(detailName1);
        JSONArray jsonArray2 = (JSONArray) jsonObject.get(detailName2);

        T mainEntity = JSONUtils.toBean(jsonObject, mainClass);
        List detailList1 = JSONUtils.toList(jsonArray1, detailClass1);
        List detailList2 = JSONUtils.toList(jsonArray2, detailClass2);

        try
        {
            BeanUtils.setProperty(mainEntity, detailName1, detailList1);
            BeanUtils.setProperty(mainEntity, detailName2, detailList2);
        }
        catch (Exception ex)
        {
            throw new RuntimeException("    JSON        !");
        }

        return mainEntity;
    }
    
    /***
     *  JSON              
     * @param   T        
     * @param   D1        
     * @param   D2        
     * @param jsonString JSON  
     * @param mainClass      
     * @param detailName1              
     * @param detailClass1      
     * @param detailName2              
     * @param detailClass2      
     * @param detailName3              
     * @param detailClass3      
     * @return
     */
    public static  T toBean(String jsonString,
            Class mainClass, String detailName1, Class detailClass1,
            String detailName2, Class detailClass2, String detailName3,
            Class detailClass3)
    {
        JSONObject jsonObject = JSONObject.fromObject(jsonString);
        JSONArray jsonArray1 = (JSONArray) jsonObject.get(detailName1);
        JSONArray jsonArray2 = (JSONArray) jsonObject.get(detailName2);
        JSONArray jsonArray3 = (JSONArray) jsonObject.get(detailName3);

        T mainEntity = JSONUtils.toBean(jsonObject, mainClass);
        List detailList1 = JSONUtils.toList(jsonArray1, detailClass1);
        List detailList2 = JSONUtils.toList(jsonArray2, detailClass2);
        List detailList3 = JSONUtils.toList(jsonArray3, detailClass3);

        try
        {
            BeanUtils.setProperty(mainEntity, detailName1, detailList1);
            BeanUtils.setProperty(mainEntity, detailName2, detailList2);
            BeanUtils.setProperty(mainEntity, detailName3, detailList3);
        }
        catch (Exception ex)
        {
            throw new RuntimeException("    JSON        !");
        }

        return mainEntity;
    }

    /***
     *  JSON              
     * @param       
     * @param jsonString JSON  
     * @param mainClass      
     * @param detailClass                     
     * @return
     */
    public static  T toBean(String jsonString, Class mainClass,
            HashMap detailClass)
    {
        JSONObject jsonObject = JSONObject.fromObject(jsonString);
        T mainEntity = JSONUtils.toBean(jsonObject, mainClass);
        for (Object key : detailClass.keySet())
        {
            try
            {
                Class value = (Class) detailClass.get(key);
                BeanUtils.setProperty(mainEntity, key.toString(), value);
            }
            catch (Exception ex)
            {
                throw new RuntimeException("    JSON        !");
            }
        }
        return mainEntity;
    }
}

上のコードに必要なjarパッケージは、json-lib-2.3-jdk 15.jar、commons-beanutils-1.8.0.jarです.