com.loocme.sys.util.MapUtil Maven / Gradle / Ivy

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package com.loocme.sys.util;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

/**
 * Map集合帮助类
 * 
 * @author loocme
 * 
 */
public class MapUtil
{

    /**
     * 判断map集合是否为空
     * 
     * @param map
     *            集合
     * @return 是否为空
     */
    public static boolean isNull(Map map)
    {
        return null == map || map.isEmpty();
    }

    /**
     * 判断map集合是否非空
     * 
     * @param map
     *            集合
     * @return 是否非空
     */
    public static boolean isNotNull(Map map)
    {
        return !isNull(map);
    }
    
    public static  Map contactMap(Map map1, Map map2)
    {
        Map retMap = new HashMap(16);
        if (null != map1)
        {
            retMap.putAll(map1);
        }
        if (null != map2)
        {
            retMap.putAll(map2);
        }
        return retMap;
    }
    
    public static Map fromJsonObject(JSONObject obj)
    {
        Map retMap = new HashMap(16);
        if (null == obj)
        {
            return retMap;
        }
        
        Iterator it = obj.keySet().iterator();
        while (it.hasNext())
        {
            String key = it.next();
            Object tempVal = obj.get(key);
            if (tempVal instanceof JSONObject)
            {
                retMap.put(key, fromJsonObject((JSONObject) tempVal));
            }
            else if (tempVal instanceof JSONArray)
            {
                retMap.put(key, ListUtil.fromJsonArray((JSONArray) tempVal));
            }
            else
            {
                retMap.put(key, tempVal);
            }
        }
        return retMap;
    }
    
    public static String getString(Map map, String key)
    {
        if (MapUtil.isNull(map))
        {
            return "";
        }
        
        Object value = map.get(key);
        if (null == value)
        {
            return "";
        }
        
        return value.toString();
    }
    
    public static Integer getInteger(Map map, String key)
    {
        return StringUtil.getInteger(getString(map, key));
    }
    
    public static Float getFloat(Map map, String key)
    {
        return StringUtil.getFloat(getString(map, key));
    }
    
    public static Double getDouble(Map map, String key)
    {
        return StringUtil.getDouble(getString(map, key));
    }
    
    public static Long getLong(Map map, String key)
    {
        return StringUtil.getLong(getString(map, key));
    }
    
    public static Boolean getBoolean(Map map, String key)
    {
        return StringUtil.getBoolean(getString(map, key));
    }
}