Today, I used hbuilderx for the first time. I found that when hbuilderx was running an HTML project, it would automatically give me a service, such as access index.html It became http://127.0.0.1 :8848/myFirstHtmlProject/ index.html Instead of file: / / / C / users / administrator / documents / hbuilderprojects / myfirsthtml project/ index.html . This leads to a question: how can a simple HTML project build a service? Java Web projects generally use Tomcat as an application server to build web services. So for an HTML project, do I need to use Tomcat to build web services? It's not like killing a chicken with a bull's knife. Please give me your advice.