springBoot-project | spring boot整理总结样例 | Application Framework library

Change 2.0.0.BUILD-SNAPSHOT to 2.0.0.RELEASE

We dont know what exactly the video is describing and which steps you did or dont did. And it looks you are working on a quite new project. So I would recommend you to start a new spring-starter project using your IDE STS instead of finding any error in your code or video. So you will save time and you will have a running application.

Build on your pom.xml you will need spring-boot and spring-web. I will also say that you use a newer stable version.

So let`s start to create a project:

Go to File -> New -> Spring Starter Project

After that you will see a box like that:

Just add your project name, your group and artifact (could also be the default) and if you want to package the app as jar(recommended) or war. After that hit next.

In the second box you are able to add your dependencies to your project. In your case you will add Web.

Hit the finish button and your project gets build. You should now be able to start this application directly. Now feel free to follow new steps in the video or try something else. For instance create a Controller class.

I'm not use STS but following from this docs you should run your app as Spring Boot App since you're using Spring Boot. But your error it's seems because dependency error, if you familiar with command line I suggest you to perform mvn clean install before run your Spring project to make sure all the dependency is downloaded.

Another tips, if you're good with command line try to execute mvn spring-boot:run on your project directory and it will execute your Spring project.