Resolving error template template may not exist or may not be accessible

1. there may be a problem with your controller annotation

1. the difference between controller annotation and restcontroller annotation. Thymeleaf configures the corresponding path in the properties or YML configuration file

1. about
   1. properties spring.web.resources.static-locations=classpath:/static/, classpath:/templates/ yml

	spring:
      thymeleaf:
        # thymeleaf The directory where the page is stored
        prefix: classpath:/templates/

Return path problem
there is no Maven clear in the return path