var MongoClient = require('mongodb').MongoClient;var DB_CONN_STR = 'mongodb://zlg:437612lang@110.62.14.243:27017/lj_node';MongoClient.connect(DB_CONN_STR, function(err, db) {  if(err){console.log(err)} else{console.log("連接成功！");}  //連接到表  var collection = db.collection("lj_node"); //查詢數據 collection.find().toArray(function(err, result) {  if(err)  {   console.log('Error:'+ err);   return;  } else {    console.log(result[0].name)  }  db.close(); //關閉鏈接 });});

mongodb.connect(mongodb_url,function(err,client){//創建鏈接實例  if(err)    console.log(err);  else{    var dbname="lj_node";    var db=client.db(dbname);//創建數據庫實例    var collection = db.collection('lj_node');//創建表實例    collection.find({}).toArray(function(err, docs) {//查詢數據      console.log(docs)      client.close();//關閉鏈接     });  }})