@restcontrollerhe@controller

@RestController和@Controller的区别在于@RestController注解相当于@ResponseBody ＋ @Controller合在一起的作用，即@RestController是用来返回JSON数据的，而@Controller一般用来返回视图页面。下面是两个注解的示例代码：

1.使用@Controller注解

@Controller
@RequestMapping("/hello")
public class HelloController {
    @RequestMapping("/world")
    public String helloWorld(Model model) {
        model.addAttribute("message", "Hello World!");
        return "hello";
    }
}

2.使用@RestController注解

@RestController
@RequestMapping("/hello")
public class HelloRestController {
    @RequestMapping("/world")
    public Map<String, String> helloWorld() {
        Map<String, String> map = new HashMap<>();
        map.put("message", "Hello World!");
        return map;
    }
}