nodejs报错：Cannot find module 'ejs'

错误显示：

Error: Cannot find module 'ejs'
   at Function.Module._resolveFilename (module.js:325:15)
   at Function.Module._load (module.js:276:25)
   at Module.require (module.js:353:17)
   at require (internal/module.js:12:17)
   at new View (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\view.js:78:30)
   at EventEmitter.render (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\application.js:569:12)
   at ServerResponse.render (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\response.js:961:7)
   at exports.showIndex (d:\WebClient\webstormSpace\day6shuoshuo\routes\router.js:7:9)
   at Layer.handle [as handle_request] (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\router\layer.js:95:5)
   at next (d:\WebClient\webstormSpace\day6shuoshuo\node_modules\express\lib\router\route.js:131:13)

原因：没有安装ejs模块

解决办法：

cmd进入到项目目录，安装ejs：npm install --save ejs