Json解析

public static void main(String[] args) {
		
		String json = "{\"code\":\"200\",\"msg\":\"数据获取成功\",\"data\":{\"codes\":900,\"HuKouBen\":\"zhangsan\",\"FangChanZheng1\":null}}";
		/**
		 * 将Json字符串转换为JsonObject
		 */
		JSONObject jsonObject = JSONObject.parseObject(json);
		getJson(jsonObject);
		List<String> list = new ArrayList<String>();
		getJsonIsNullCount(jsonObject,0,list);
		
		
	}
	
	/**
	 * 解析Json字符串
	 * @param jsonObj
	 */
	public static void getJson(JSONObject jsonObj) {
		String codeValue = jsonObj.getString("code");
		if ("200".equals(codeValue)) {
			Object jsonArray = jsonObj.get("data"); 
       	    JSONObject jsons = (JSONObject) JSONObject.toJSON(jsonArray);
       	    Object value = jsons.get("HuKouBen");
       	    System.out.println(value);
		}
	}
	
	
	/**
	 * 递归解析json字符串
	 * "{\"code\":\"200\",\"msg\":\"数据获取成功\",\"data\":{\"codes\":900,\"HuKouBen\":\"zhangsan\",\"FangChanZheng1\":null}}";
	 * @param jsonObj
	 * @param count
	 * @return
	 */
	public static int getJsonIsNullCount(JSONObject jsonObj, int count, List<String> list) {
		int coun = count;
		Iterator<Entry<String, Object>> it = jsonObj.entrySet().iterator();
	    while (it.hasNext()){
	       	Entry<String, Object> obj = it.next();
	       	String key = obj.getKey();
	       	if ("data".equalsIgnoreCase(key)){
	       		Object jsonArray = jsonObj.get("data"); 
	       		//将会获取的Json串转化为JSONObject
	       	    JSONObject jsons = (JSONObject) JSONObject.toJSON(jsonArray);
	       	    coun = getJsonIsNullCount(jsons,coun,list); 
	       	}
	       	if ("HuKouBen1".equalsIgnoreCase(key) || "FangChanZheng1".equalsIgnoreCase(key) ||
	       		"ShiJiKongZhiRenZhengXinBaoGao".equalsIgnoreCase(key) || "PeiOuZhengXinBaoGao".equalsIgnoreCase(key) 
	       		|| "QiYeZhengXinBaoGao".equalsIgnoreCase(key) || "ShiErGeYueXiaoShouQingDan".equalsIgnoreCase(key)
	       		|| "ShiErGeYueXiaoShouLiuShui1".equalsIgnoreCase(key) || "ShiErGeYueXiaoShouLiuShui2".equalsIgnoreCase(key)) {
	       		coun = getValeIsNullOrNot(obj, coun, list);
	       	}
       }
	   return coun;
	}
	
	/**
	 * 判斷值是否為null
	 * @param obj
	 * @param count
	 * @return
	 */
	public static int getValeIsNullOrNot(Entry<String, Object> obj, int count, List<String> list) {
//		System.out.println(obj.getKey() + "," + obj.getValue());
  		 if (obj.getValue() == null) {
  			 System.out.println(obj.getKey() + " value is null");
  			 list.add(obj.getKey());
  			 count++;
  		 } 
		return count;
	}