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NodeJS+Koa学习笔记(0-1)Node.js 环境搭建

  • 2026-05-07 08:31:36
NodeJS+Koa学习笔记(0-1)Node.js 环境搭建

Node.js 环境搭建

Node.js 环境是我们运行Node.js项目或前端项目的标准环境其中我们需要npm安装依赖或启动项目、需要Node.js搭建服务器与操作数据库我们还需要nvm工具,为我们便捷切换本地的Node.js版本环境,来应对不同项目的Node.js 环境开发启动

Node Version Manager(NVM)的安装流程

nvm请优先安装,安装顺序为1、安装nvm2、安装node

Nvm MacOS 安装步骤

  • 1、使用 Homebrew 安装 NVM
  • • brew install nvm
  • 2、配置 Shell 环境
  • • 安装完成后,Homebrew 会给出提示,告诉您需要在您的 Shell 配置文件中添加几行代码。通常,您需要执行以下操作:
  • • vi ~/.zshrc
  • • 点击 o按键,准备插入
  • • 在文件末尾添加以下行:
export NVM_DIR="$HOME/.nvm"[ -s "/opt/homebrew/opt/nvm/nvm.sh" ] && \. "/opt/homebrew/opt/nvm/nvm.sh"# This loads nvm[ -s "/opt/homebrew/opt/nvm/etc/bash_completion.d/nvm" ] && \. "/opt/homebrew/opt/nvm/etc/bash_completion.d/nvm"# This loads nvm bash_completion
  • • :wq退出并保存
  • 3、重新加载配置文件
  • • source ~/.zshrc
  • 4、运行 nvm --version 来验证。

Nvm Windows 安装步骤

安装包github下载地址

https://github.com/coreybutler/nvm-windows/releases

安装包gitee下载地址

https://gitee.com/xiaoli-account/web-log/tree/master/%E5%BC%80%E5%8F%91%E5%B7%A5%E5%85%B7/nodejs&nvm/nvm%E5%AE%89%E8%A3%85%E5%8C%85

安装流程

  1. 1. 选择 nvm 安装路径
  2. 2. 选择 node.js 安装路径
  3. 3. 之后就是一直 next
  4. 4. 检测是否安装成功,通过 nvm version 命令查看版本号
  5. 5. 切换 node 版本nvm use
  6. 6. 显示当前使用的node版本node -v

Node.js安装流程

⚠️⚠️⚠️如果安装了nvm则无需此步骤,可直接通过nvm安装你需要的node版本环境️

下载安装

参考文档

https://nodejs.org/

前往官网直接下载,按步骤安装即可,无特殊步骤,此处仅对Homebrew安装方式进行说明

Homebrew安装

  • • 1、没装过Homebrew需要先安装 Homebrew,执行命令 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
  • • 2、执行命令安装Node.jsbrew install node
  • • 3、通过node -vnpm -v 命令验证安装是否成功
常用命令汇总

包含node的常用命令与nvm的常用命令

nvm常用命令

命令
作用
使用示例
nvm list
查看已安装的node版本列表
nvm ls
nvm ls-remote
查看可远程安装的 Node.js 版本列表
nvm ls-remote
nvm version
查看nvm版本号信息
nvm version
nvm install
安装指定的node版本
nvm install v25.2.1
nvm install --lts
安装最新的长期支持版
nvm install --lts
nvm uninstall
卸载指定的node版本
nvm uninstall v25.2.1
nvm use
切换正在使用的node版本
nvm use v25.2.1 / nvmuse 25
nvm current
当前正在使用的node版本
nvm current
nvm list installed
查看可安装的node版本列表
nvm list installed
nvm alias default
设置默认的 Node.js 版本
nvm alias defaultv25.2.1

node常用命令

命令
作用
使用示例
node --version
查看本地node版本号信息
node -v
node
进入 Node 交互式环境(可直接写 JS)
node
node 文件名.js
运行一个 JS/Node 文件
node app.js
node --help
查看 Node 帮助文档
node --help

npm常用命令

命令
作用
使用示例
npm -version
查看本地npm版本号信息
npm -v
npm init
初始化项目,生成 package.json
npm init
npm init -y
快速初始化(跳过提问)
npm init -y
npm install
安装项目所有依赖(根据 package.json)
npm install / npm i
npm install 包名
安装指定包(运行 + 开发都能用)
npm install axios
npm install 包名 --save-dev
仅开发环境安装(如打包工具)
npm install webpack -D
npm install -g 包名
全局安装工具(任何目录可用)
npm install -g nodemon
npm uninstall 包名
卸载指定包
npm uninstall axios
npm update 包名
更新指定包到最新版
npm update axios
npm run 脚本名
执行 package.json 里的脚本
npm run dev / npm run build
npm list
查看当前项目已安装的包
npm list
npm list -g
查看全局安装的包
npm list -g
npm cache clean --force
清理 npm 缓存(解决安装报错)
npm cache clean --force
npm help
查看 npm 帮助
npm help

常见问题

  • • 1、安装依赖失败?
  • • 检查所安装的依赖是否需要代理,如需要则可使用国内镜像(自行查找)
  • • 检查安装命令是否正确
  • • 删除node_models目录,执行npm cache clean --force命令,然后重新npm install
  • • 2、安装sqlite3依赖失败
  • • 检查你本地是否有c++的开发环境(Visual Studio 生成工具),运行安装程序,在弹出的界面中勾选 “使用 C++ 的桌面开发” (Desktop development with C++ )

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  1. CONNECT:[ UseTime:0.000596s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000826s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000343s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000334s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000529s ]
  6. SELECT * FROM `set` [ RunTime:0.000260s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000576s ]
  8. SELECT * FROM `article` WHERE `id` = 486640 LIMIT 1 [ RunTime:0.000502s ]
  9. UPDATE `article` SET `lasttime` = 1778126390 WHERE `id` = 486640 [ RunTime:0.003313s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000263s ]
  11. SELECT * FROM `article` WHERE `id` < 486640 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000516s ]
  12. SELECT * FROM `article` WHERE `id` > 486640 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000482s ]
  13. SELECT * FROM `article` WHERE `id` < 486640 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001083s ]
  14. SELECT * FROM `article` WHERE `id` < 486640 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004503s ]
  15. SELECT * FROM `article` WHERE `id` < 486640 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002207s ]
0.085322s