@Controller vs @RestController

@Controller用于标记一个类，使用它标记的类就是一个SpringMVC Controller对象。

@RestController = @Controller + @ResponseBody

 @Target(value=TYPE) @Retention(value=RUNTIME) @Documented @Controller @ResponseBody public @interface RestController

A convenience annotation that is itself annotated with @Controller and @ResponseBody.

Types that carry this annotation are treated as controllers where @RequestMapping methods assume @ResponseBody semantics by default.

https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/bind/annotation/RestController.html

https://stackoverflow.com/questions/25242321/difference-between-spring-controller-and-restcontroller-annotation