mongodb如何导入shapefile数据？

package cn.tzy.mongodb;

import java.io.File;

import java.io.IOException;

import java.io.StringWriter;

import org.bson.Document;

import org.geotools.data.FileDataStore;

import org.geotools.data.FileDataStoreFinder;

import org.geotools.data.simple.SimpleFeatureIterator;

import org.geotools.data.simple.SimpleFeatureSource;

import org.geotools.geojson.feature.FeatureJSON;

import org.opengis.feature.simple.SimpleFeature;

import com.mongodb.MongoClient;

import com.mongodb.client.MongoCollection;

import com.mongodb.client.MongoDatabase;

public class MongoEx {

    public static void main(String[] args) throws IOException {

        final String IP_ADDRESS = "127.0.0.1";

        final String DB_NAME = "SpatialFeatures";

        final String COLLECTION_NAME = "continents";

        final String SHAPE_FILE = "/home/theone/Data/World/continent.shp";

        MongoClient client = new MongoClient(IP_ADDRESS, 27017);

        MongoDatabase db = client.getDatabase(DB_NAME);

        db.createCollection(COLLECTION_NAME);

        MongoCollection<Document> coll = db.getCollection(COLLECTION_NAME);

        File shapeFile = new File(SHAPE_FILE);

        FileDataStore store = FileDataStoreFinder.getDataStore(shapeFile);

        SimpleFeatureSource sfSource = store.getFeatureSource();

        SimpleFeatureIterator sfIter = sfSource.getFeatures().features();

        // 依次取出每一个Feature转为GeoJSON格式，然后插入到collection中

        while (sfIter.hasNext()) {

            SimpleFeature feature = (SimpleFeature) sfIter.next();

            FeatureJSON fjson = new FeatureJSON();

            StringWriter writer = new StringWriter();

            fjson.writeFeature(feature, writer);

            String sjson = writer.toString();

            Document doc = Document.parse(sjson);

            coll.insertOne(doc);

        }

        client.close();

    }

}