Spring问题：出现意外错误（type = Not Found，status = 404）

I am going through this book on restful web services with spring. I decided to move away from what they were doing and use java configuration files. For some reason, after switching over to the Java configuration, the service would run (in the console window) correctly but when I actually go to the endpoint on localhost i get this:I am going through this book on restful web ser