使用nodejs将数据保存到mongodb

npm install mongodb

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

const url = 'mongodb://localhost:27017'; // MongoDB数据库的连接URL
const dbName = 'mydatabase'; // 数据库名称

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

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

  const db = client.db(dbName);

  // 在这里执行数据库操作

  client.close();
});

const collection = db.collection('mycollection'); // 集合名称

const data = { name: 'John', age: 30 };

collection.insertOne(data, function(err, result) {
  if (err) {
    console.error('Failed to insert data:', err);
    return;
  }

  console.log('Data inserted successfully');
});

const collection = db.collection('mycollection'); // 集合名称

collection.find({ name: 'John' }).toArray(function(err, docs) {
  if (err) {
    console.error('Failed to fetch data:', err);
    return;
  }

  console.log('Fetched data:', docs);
});

const collection = db.collection('mycollection'); // 集合名称

const filter = { name: 'John' };
const update = { $set: { age: 35 } };

collection.updateOne(filter, update, function(err, result) {
  if (err) {
    console.error('Failed to update data:', err);
    return;
  }

  console.log('Data updated successfully');
});

const collection = db.collection('mycollection'); // 集合名称

const filter = { name: 'John' };

collection.deleteOne(filter, function(err, result) {
  if (err) {
    console.error('Failed to delete data:', err);
    return;
  }

  console.log('Data deleted successfully');
});