Node.js连接MongoDB的CURD，auth=true认证模式

1.使用npm下载mongodb的module到项目中，我使用的是“mongodb”：npm install mongodb

2.代码，注意：var mongoUrl = "mongodb://root:[email protected]:27017/"中的root:root是mongodb的auth用户名密码：

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

var mongoUrl = "mongodb://root:[email protected]:27017/";

MongoClient.connect(mongoUrl,function(err,server){
    if(err){
        throw err;
    }
    console.log("数据库连接成功");
    // insertMany(server);
    // find(server);
    // findById(server);
    // update(server);
    deleteT(server);
})
//新增
function insertOne(server){
    var dbase = server.db("test");
    var json = {id:"2",name:"baby",age:"20"};
    dbase.collection("nodetestcollection").insertOne(json,function(err,res){
        if(err){
            throw err;
        }
        console.log("新增成功！");
        server.close();
    })
}
//新增多条数据
function insertMany(server){
    var db = server.db("test");
    var obj = [{id:"3",name:"baby",age:"20"},{id:"3",name:"baby",age:"20"},{id:"5",name:"baby",age:"20"}];
    db.collection("nodetestcollection").insertMany(obj,function(err,res){
        if(err){
            throw err;
        }
        console.log("一次新增多个成功");
        server.close();
    });
}
//查询
function find(server){
    var db = server.db("test");
    db.collection("nodetestcollection").find({}).toArray(function(err,res){
        if(err){
            throw err;
        }
        console.log(res);
        server.close();
    })
}
//带条件查询
function findById(server){
    var db = server.db("test");
    var id = {id:"3"};
    db.collection("nodetestcollection").find(id).toArray(function(err,res){
        if(err){
            throw err;
        }
        console.log(res);
        server.close();
    }) 
}
//更新
function update(server){
    var db = server.db("test");
    var find = {id:"3"};
    var update = {$set:{name:"newNamehha"}};
    db.collection("nodetestcollection").update(find,update,function(err,res){
        if(err){
            throw err;
        }
        console.log(res);
        server.close();
    })
}
//删除
function deleteT(server){
    var db = server.db("test");
    var condition = {id:'3'};
    db.collection("nodetestcollection").deleteMany(condition,function(err,res){
        if(err){
            throw err;
        }
        console.log(res);
        server.close();
    })
}