node----DeprecationWarning: current URL string parser is deprecated和Port 3000 is already in use的问题

首先,安装了express和supervisor;

在package.json中:

"scripts": {
    "start": "supervisor ./bin/www"
  },

项目根目录下的命令窗口中运行:npm start

但结果却出现以下情况:

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.

Port 3000 is already in use...

以上2个问题的解决办法:

(1)URL字符串解析问题的解决办法:mongoose连接数据库时除了url参数外增加2个参数,如下所示:

mongoose.connect("mongodb://127.0.0.1:27017/test",{useNewUrlParser:true},function(err){
  if(err){  
    console.log('Connection Error:' + err)  
  }else{   
    console.log('Connection success!')}  
});

 

(2)端口号被占用的解决办法:首先确保同一端口号不能同时开启的2个项目,其次检查命令是否写正确,最后看一下电脑是否安装了类似于百度杀毒的软件,将软件卸载再重新运行命令即可恢复正常!

 

posted @ 2019-01-15 21:16  snowstorm_22  阅读(1959)  评论(0编辑  收藏  举报