Node.js操作MongoDB数据库实例分析

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本文实例讲述了Node.js操作MongoDB数据库。分享给大家供大家参考，具体如下：

Node.js操作MongoDB

npm initnpm i mongodb --save

{ "name": "test", "version": "1.0.0", "description": "", "main": "app.js", "scripts": {  "test": "echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "ISC", "dependencies": {  "mongodb": "^3.1.1" }}

连接数据库

// connect.jsconst MongoClient = require('mongodb').MongoClient;// Connection URLconst url = 'mongodb://localhost:27017';// Database Nameconst dbName = 'mydatabase';// Use connect method to connect to the serverMongoClient.connect(url, { useNewUrlParser: true }, function(err, client) { console.log("Connected successfully to server"); const db = client.db(dbName); client.close();});

插入

// insert.jsconst MongoClient = require('mongodb').MongoClient;// Connection URLconst url = 'mongodb://localhost:27017';// Database Nameconst dbName = 'mydatabase';// 插入var insertData = function (db, callback) { // 获取文档集合 var collection = db.collection('collection3'); var data = [{"name": "李二狗001", "age": 20}, {"name": "李二狗002", "age": 21}]; // 插入文档 collection.insert(data, function (err, result) {  if(err) {   console.log('Error: ' + err);   return;  }  callback(result); })}// Use connect method to connect to the serverMongoClient.connect(url, { useNewUrlParser: true }, function(err, client) { console.log("Connected successfully to server"); const db = client.db(dbName); insertData(db, function (result) {  console.log(result);  client.close(); });});

查询

// find.jsconst MongoClient = require('mongodb').MongoClient;// Connection URLconst url = 'mongodb://localhost:27017';// Database Nameconst dbName = 'mydatabase';// 查询var findData = function (db, callback) { // 获取文档集合 var collection = db.collection('collection3'); var whereStr = {"name": "李二狗001"}; // 查询文档 collection.find(whereStr).toArray(function (err, result) {  if(err) {   console.log('Error: ' + err);   return;  }  callback(result); })}// Use connect method to connect to the serverMongoClient.connect(url, { useNewUrlParser: true }, function(err, client) { console.log("Connected successfully to server"); const db = client.db(dbName); findData(db, function (result) {  console.log(result);  client.close(); })});

修改

// update.jsconst MongoClient = require('mongodb').MongoClient;// Connection URLconst url = 'mongodb://localhost:27017';// Database Nameconst dbName = 'mydatabase';// 修改var updateData = function (db, callback) { // 获取文档集合 var collection = db.collection('collection3'); var whereStr = {"name": "李二狗002"}; var updateStr = {$set: {"age": 100}}; // 修改文档 collection.update(whereStr, updateStr, function (err, result) {  if(err) {   console.log('Error: ' + err);   return;  }  callback(result); })}// Use connect method to connect to the serverMongoClient.connect(url, { useNewUrlParser: true }, function(err, client) { console.log("Connected successfully to server"); const db = client.db(dbName); updateData(db, function (result) {  console.log(result);  client.close(); })});

删除

// delete.jsconst MongoClient = require('mongodb').MongoClient;// Connection URLconst url = 'mongodb://localhost:27017';// Database Nameconst dbName = 'mydatabase';// 删除var delData = function (db, callback) { // 获取文档集合 var collection = db.collection('collection3'); var whereStr = {"name": "李二狗002"}; // 删除文档 collection.remove(whereStr, function (err, result) {  if(err) {   console.log('Error: ' + err);   return;  }  callback(result); })}// Use connect method to connect to the serverMongoClient.connect(url, { useNewUrlParser: true }, function(err, client) { console.log("Connected successfully to server"); const db = client.db(dbName);  delData(db, function (result) {  console.log(result);  client.close(); })});

参考：

https://www.npmjs.com/package/mongodb
/article/58815.htm
/article/98813.htm

希望本文所述对大家node.js程序设计有所帮助。

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