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  • nodeDeprecationWarning: 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!

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  • 原文地址:https://www.cnblogs.com/snowstorm22/p/10274331.html
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