nodejs直接操作mongodb

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var  mongodb = require('mongodb');var  server  = new mongodb.Server('localhost', 27017, {auto_reconnect:true});var  db = new mongodb.Db('mydb', server, {safe:true});//连接dbdb.open(function(err, db){    if(!err){        console.log('connect db');        db.createCollection('first', {safe:true}, function(err, collection){            if(err){                console.log(err);            }else{console.log('ok');                //新增数据var person01={"学号":"2011012301","name":"张三","email":"zhangs001@nenu.edu.cn","teacher":"呵呵01"};                var person02={"学号":"2011012302","name":"李四","email":"lis002@nenu.edu.cn","teacher":"呵呵02"};var person03={"学号":"2011012303","name":"王五","email":"wangw003@nenu.edu.cn","teacher":"呵呵01"};                collection.insert(person01);collection.insert(person02);collection.insert(person03);console.log("isnert success");//查找collection.find(function (err, cursor) {cursor.each(function (err, doc) {if (doc) {                            console.log('doc.学号:' + doc.学号,'doc.name:' + doc.name,'doc.email:' + doc.email,'doc.teacher:' + doc.teacher);                        }                    });                });            }        });//删除console.log('delete first');db.dropCollection('first');    }else{        console.log(err);    }});
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