关于nodejs DeprecationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.
const mongoose = require('mongoose')
mongoose.connect("mongodb://localhost:27017/study", {useNewUrlParser:true}, function(err){
if(err){
console.log('Connection Error:' + err)
}else{
console.log('Connection success!') }
})