2小时学会Spring Boot学习-controller的使用

新建HelloController类
添加注解

@RestController　　//等同于@Controller+@ResponseBody
@RequestMapping(value = "hello")　　//访问此controller类时, hello为'父'路径    localhost:8080/hello/hi
public class HelloController {

    @GetMapping(value = {"/say/{id}","/hi/{id}"})  //localhost:8080/hello/say/123 == localhost:8080/hello/hi/123
    public String say(@PathVariable(value = "id") Integer id){　　//@PathVarable(value="id") 获取restful路径中的参数 localhost:8080/hello/say/123     id==123
        return id;
    }

　　public String say(@RequestParam(value = "id",requied=false,defaultValue="0") Integer id){　　//@RequestParam 路径访问形式为带参数 localhost:8080/hello/say?id=123   requied必填  defaultValue默认值
        return id;
    }
}