在安装npm安装包的时候报错如下：

npm WARN saveError ENOENT: no such file or directory, open 'G:\Node\package.json'
npm WARN enoent ENOENT: no such file or directory, open 'G:\Node\package.json'
npm WARN Node No description
npm WARN Node No repository field.
npm WARN Node No README data
npm WARN Node No license field.

原因：项目目录中没有package.json

解决：

使用 npm init -f 命令来生成一个package.json

生成package.json在执行npm install xxx

npm WARN nodetest1@1.0.0 No description
npm WARN nodetest1@1.0.0 No repository field.
npm WARN file-explorer@0.0.1 No repository field or no license field

显示缺少description描述和repository字段，还有private字段

根据模板package.json，添加description中的值以及repository字段

{
  "name": "WeiXinNode",
  "version": "1.0.0",
  "description": "这里是------description",
  "main": "index.js",
  "dependencies": {
    "koa": "^2.1.0",
    "sha1": "^1.1.1"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "repository": { 这里是------repository字段
    "type": "",
    "url": ""
  },
  "private": true   这里是------private字段
}