mangoDB获取scofield的所有成绩成绩信息(只显示score列

package com.mongo;

import org.bson.Document;

import com.mongodb.MongoClient;

import com.mongodb.client.MongoCollection;

import com.mongodb.client.MongoCursor;

import com.mongodb.client.MongoDatabase;

import com.mongodb.client.model.Filters;

import static com.mongodb.client.model.Filters.eq;

public class MongoTest2 {

    public static void main(String[] args) {

        MongoClient  mongoClient=new MongoClient("localhost",27017);

        MongoDatabase mongoDatabase = mongoClient.getDatabase("student");

        MongoCollection<Document> collection = mongoDatabase.getCollection("student");

        MongoCursor<Document>  cursor=collection.find( new Document("name","scofield")).

                projection(new Document("score",1).append("_id", 0)).iterator();

        while(cursor.hasNext())

            System.out.println(cursor.next().toJson());

    }

}