java mongodb near查询

import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoDatabase;

// 创建MongoDB连接
MongoClient mongoClient = MongoClients.create("mongodb://localhost:27017");
MongoDatabase database = mongoClient.getDatabase("mydb");

import org.bson.Document;
import com.mongodb.client.model.Filters;
import com.mongodb.client.model.Indexes;

// 创建地理位置索引
database.getCollection("mycollection").createIndex(Indexes.geo2dsphere("location"));

// 执行near查询
Document query = new Document("location",
        new Document("$near",
                new Document("$geometry",
                        new Document("type", "Point").append("coordinates", Arrays.asList(1.0, 2.0)))
                        .append("$maxDistance", 1000))); // 最大距离为1000米

Document result = database.getCollection("mycollection").find(query).first();