将本地主机MongoDb连接到应用程序

use mydatabase
db.createCollection("mycollection")

const MongoClient = require('mongodb').MongoClient;

const url = 'mongodb://localhost:27017';
const dbName = 'mydatabase';

MongoClient.connect(url, function(err, client) {
  if (err) {
    console.error('Failed to connect to MongoDB:', err);
    return;
  }

  console.log('Connected to MongoDB successfully');

  const db = client.db(dbName);

  // 在这里可以执行数据库操作

  client.close();
});

from pymongo import MongoClient

url = 'mongodb://localhost:27017'
db_name = 'mydatabase'

client = MongoClient(url)
db = client[db_name]

# 在这里可以执行数据库操作

client.close()

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

String url = "mongodb://localhost:27017";
String dbName = "mydatabase";

MongoClient client = MongoClients.create(url);
MongoDatabase database = client.getDatabase(dbName);

// 在这里可以执行数据库操作

client.close();