express4.x version Modify default template jade for Ejs and try HTML for view template suffix __c language

After installing the express4.x version via NPM, the default view template is found to be jade, and if you want to use the Ejs template, install it via NPM first Ejs

    NPM Install Ejs

Then open the App.js file and put the inside

    App.set ("Views", Path.join (__dirname, ' views '));
	App.set (' View engine ', ' Jade ');

Two sentences are modified as follows:

    App.set (' Views ', Path.join (__dirname, ' views/'));
	App.engine ('. html ', require (' Ejs '). RenderFile);
	App.set (' View engine ', ' html ');

This allows you to try the Ejs template, and the template file can be directly an HTML file