@RestController注解

@RestController简单粗暴的理解就是@RestController=@Controller+@ResponseBody

下图所示为测试结果

效果跟@Controller+@ResponseBody是一样的

另外

This code uses Spring 4’s new @RestController annotation, which marks the class as 
a controller where every method returns a domain object instead of a view. It’s shorthand for 
@Controller and @ResponseBody rolled together.

上面是官网的解释
由上面可见，@RestController=@Controller+@ResponseBody