export files from mongo gridfs

App.java

package com.ewnd9;

import java.util.List;
import java.io.File;
import java.io.IOException;
import java.net.UnknownHostException;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.BasicDBObject;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
import com.mongodb.gridfs.GridFS;
import com.mongodb.gridfs.GridFSDBFile;
import com.mongodb.gridfs.GridFSInputFile;
 
public class App {
	public static void main(String[] args) {
		String address = args[0];
		int port = Integer.parseInt(args[1]);
		String dbName = args[2];
		String collection = args[3];
		String outputFolder = args[4];

		try {
			Mongo mongo = new Mongo(address, port);
			DB db = mongo.getDB(dbName);
			
			GridFS gfsPhoto = new GridFS(db, collection);
            		List<GridFSDBFile> files = gfsPhoto.find(new BasicDBObject());
			
			for (GridFSDBFile file : files) {
			    file.writeTo(outputFolder + file.getId());
			}
		} catch (Exception e) {
			e.printStackTrace();
		} 
	}
}

Firstly thank you for your export example
how to import data using this file??