nodejs操作mongodb数据库（mongodb）

一，准备

1. 通过npm命令安装mongodb   npm install mongodb
2. 通过npm命令安装require     npm install require
3. 安装mongodb数据库，这里不详细介绍了，网上一堆

二，开始

1.增加

var MongoClient = require("mongodb").MongoClient;

var DB_URL = "mongodb://localhost:27017/chm"; //mongodb数据库地址

function insertData(db){ var devices = db.collection('text');

var data = {"name":"zhangsan","age":22,"sex":"女","addTime":new Date()};

devices.insert(data,function(error, result){

     if(error) {

             console.log('Error:'+ error);

       }else{

             console.log(result.result.n);

   }

db.close();

});

}

MongoClient.connect(DB_URL, function(error, db){

            console.log('连接成功!');

            insertData(db);

});

2.查找

var mongodb = require('mongodb')
var MongoClient = require('mongodb').MongoClient;
var DB_CONN_STR = 'mongodb://localhost:27017/chm';  

var selectData = function(db, callback) {  
  //连接到表  
  var collection = db.collection('text');
  //查询数据
  var whereStr = {"name":'zhangsan'};
  collection.find(whereStr,function(error, cursor){
    cursor.each(function(error,doc){
        if(doc){
            //console.log(doc);
            if (doc.addTime) {
                console.log("addTime: "+doc.addTime);
            }
        }
    });

  });

}

MongoClient.connect(DB_CONN_STR, function(err, db) {
  console.log("连接成功！");
  selectData(db, function(result) {
    console.log(result);
    db.close();
  });
});

3.更新

var MongoClient = require("mongodb").MongoClient;
var DB_URL = "mongodb://localhost:27017/chm";

MongoClient.connect(DB_URL, function(error, db){
    console.log("连接成功!");
    updateData(db);
});

function updateData(db)
{
    var devices = db.collection('text');
    var whereData = {"name":"zhangsan"}
    var updateDat = {$set: {"age":26}}; //如果不用$set，替换整条数据
    devices.update(whereData, updateDat, function(error, result){
        if (error) {
            console.log('Error:'+ error);
        }else{
            console.log(result);
        }
        db.close();
    });
}

4.删除

var MongoClient = require('mongodb').MongoClient;
var DB_URL = "mongodb://localhost:27017/chm";

MongoClient.connect(DB_URL, function(error, db){
    console.log("连接成功");
    deleteData(db);
});

function deleteData(db)
{
    var devices = db.collection('vip');
    var data = {"name":"node"};
    devices.remove(data, function(error, result){
        if (error) {
            console.log('Error:'+ error);
        }else{
            console.log(result.result.n);
        }
        db.close();
    })
}