npm saveError ENOENT: no such file or directory

1、报错情况

在执行npm install xxx时，出现如下：
npm WARN saveError ENOENT: no such file or directory, open '/nodetest1/package.json'
npm WARN enoent ENOENT: no such file or directory, open '/nodetest1/package.json'

2、原因

项目目录中没有package.json

3、解决
使用 npm init -f 命令来生成一个package.json

4、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

5、显示缺少description描述和repository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": "description字段",
"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": { ------repository
"type": "",
"url": ""
},
}