import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;




public class JsonConvert {

	public static void main(String[] arg){
		 // 读取原始json文件并进行操作和输出 
		String s = ReadFile("./src/json.json"); 
		JSONArray first = JSONArray.fromObject(s);
		JSONArray newFirstArray = new JSONArray();
		for(int i=0;i<first.size();i++){
			JSONObject one = JSONObject.fromObject(first.get(i));
			JSONArray secondChild= JSONArray.fromObject(one.get("child"));
			JSONArray newSecondArray = new JSONArray();
			for(int j=0;j<secondChild.size();j++){
				JSONObject third= JSONObject.fromObject(secondChild.get(j));
				JSONArray thirdChild =(JSONArray) third.get("child");
				JSONArray newthirdArray = new JSONArray();
				for(int k =0;k<thirdChild.size();k++){
					JSONObject item = JSONObject.fromObject(thirdChild.get(k));
					String level =(String) item.get("level");				
					if(Integer.parseInt(level)>4){	
					}else{
						newthirdArray.add(item);
					}
				}
				third.put("child", newthirdArray);
				newSecondArray.add(third);
			}
			one.put("child", newSecondArray);
			newFirstArray.add(one);
		}
		System.out.println(newFirstArray.toString());
	}
	public static String ReadFile(String path) { 
 File file = new File(path); 
 BufferedReader reader = null; 
 String laststr = ""; 
 try { 
 reader = new BufferedReader(new FileReader(file)); 
 String tempString = null; 
 while ((tempString = reader.readLine()) != null) { 
 laststr = laststr + tempString; 
 } 
 reader.close(); 
 } catch (IOException e) { 
 e.printStackTrace(); 
 } finally { 
 if (reader != null) { 
 try { 
 reader.close(); 
 } catch (IOException e1) { 
 } 
 } 
 } 
 return laststr; 
 } 
}