MongoDB_Java连接Mongo 限制结果集数量

使用Java代码连接MongoDB数据库 , 查询数据库表 , 并限制返回查询数量.

源码 : Java连接Mongo限制查询数量

使用到的jar包

mongo数据库中的数据集

代码:

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.MongoClient;

import java.net.UnknownHostException;

/**
 * 使用Java限制结果集数量.
 */
public class JavaFindLimit {

    public static void main(String[] args) {
        try {

            MongoClient mongoClient = new MongoClient("localhost", 27017);
            DB db = mongoClient.getDB("test");
            DBCollection dbCollection = db.getCollection("user");

            //limitResults(dbCollection, 1);
            //limitResults(dbCollection, 2);
            limitResults(dbCollection, 10);

        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }


    public static void limitResults(DBCollection collection, Integer limit) {
        BasicDBObject query = new BasicDBObject("age", new BasicDBObject("$lt", 100));
        DBCursor dbCursor = collection.find(query);
        dbCursor.limit(limit);
        while (dbCursor.hasNext()) {
            System.out.println(dbCursor.next());
        }
    }

}