NodeJS加MongoDB应用入门

OS：Windows 7

1.下载安装MongoDB：http://www.mongodb.org/downloads

2.下载安装NodeJS：http://nodejs.org/

3.运行MongoDB，在cmd窗口运行：C:mongodbinmongod.exe --dbpath C:mongodbdatadb

4.JavaScript代码例子。

Copy/Paste以下代码到js文件，例如start.js，放到文件夹c:DebugTest下

var  mongodb = require('mongodb');
var  server  = new mongodb.Server('localhost', 27017, {auto_reconnect:true});
var  db = new mongodb.Db('testdb', server, {safe:true});

db.open(function(err, db){
    if(!err){
        console.log('connect db');
        db.createCollection('testcoll', {safe:true}, function(err, collection){
            if(err){
                console.log(err);
            }else{
                
                var item1 = {name:'Tom', age:"1"};
                   var item2 = {name:'Jerry', age:"2"};
                   collection.insert([item1,item2],{safe:true},function(err,result){
                   console.log(result);
                   }); 
                   collection.find().toArray(function(err,docs){
                   console.log('find');
                   console.log(docs);
                   }); 
                   collection.findOne(function(err,doc){
                    console.log('findOne');
                      console.log(doc);
                   }); 
            }

        });
    }else{
        console.log(err);
    }
});

5.安装mongodb模块

打开cmd窗口

把文件目录切换到start.js文件夹

运行cmd命令：npm install mongodb

6.运行start.js

在cmd窗口运行：node c:debugteststart.js

窗口输出如下：

connect db
[ { name: 'Tom', age: '1', _id: 5300533001a7ec94188eb3df },
  { name: 'Jerry', age: '2', _id: 5300533001a7ec94188eb3e0 } ]
find
[ { name: 'Tom', age: '1', _id: 5300533001a7ec94188eb3df },
  { name: 'Jerry', age: '2', _id: 5300533001a7ec94188eb3e0 } ]
findOne
{ name: 'Tom', age: '1', _id: 5300533001a7ec94188eb3df }