Java MongoDB

package com.dys.mongo;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.bson.Document;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.dys.model.Point;
import com.dys.model.Record;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.mongodb.BasicDBObject;
import com.mongodb.MongoClient;
import com.mongodb.ServerAddress;
import com.mongodb.client.FindIterable;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;

public class TestMongo {

    private static Logger logger = LogManager.getLogger(TestMongo.class);  

    private MongoClient mongoClient = null;

    @Before
    public void before() {

        /*
        MongoCredential mongoCredential = MongoCredential.createCredential("dingyingsi", "test", "dingyingsi".toCharArray());
        MongoClientOptions mongoClientOptions = MongoClientOptions.builder()
        .connectionsPerHost(10)
        .threadsAllowedToBlockForConnectionMultiplier(5)
        .readPreference(ReadPreference.nearest())
        .build();

        this.mongoClient = new MongoClient(new ServerAddress("192.168.0.110", 27017), Arrays.asList(mongoCredential), mongoClientOptions);
        */

        this.mongoClient = new MongoClient(new ServerAddress("192.168.0.110", 27017));
    }

    @After
    public void after() {
        this.mongoClient.close();
    }

    @Test
    public void test01() throws Exception {

        MongoDatabase mdb = this.mongoClient.getDatabase("dingyingsi");
        MongoCollection<Document> collection = mdb.getCollection("record");

        FindIterable<Document> findIterable = collection.find(new BasicDBObject().append("_id","1"));

        for (Document doc : findIterable) {
            ObjectMapper om = new ObjectMapper();

            Record record = om.readValue(doc.toJson(), Record.class);
            System.out.println(record.getPoints().size());
        }
    }

    @Test
    public void test02() throws Exception {
        MongoDatabase mdb = this.mongoClient.getDatabase("dingyingsi");
        MongoCollection<Document> collection = mdb.getCollection("record");

        Record record = null;
        for (int j = 1; j <= 100000; j++) {
            record = new Record();
            record.set_id(j + "");
            Point point = null;
            List<Point> points = new ArrayList<Point>();
            for (int i = 1; i <= 200000; i++) {
                point = new Point();
                point.setLongitude("120.12434");
                point.setLatitude("134.56783");
                points.add(point);
            }
            record.setPoints(points);

            ObjectMapper om = new ObjectMapper();
            String recordJson = om.writeValueAsString(record);

            Document document = Document.parse(recordJson);

            collection.insertOne(document);
        }

    }
}