2小時學會Spring Boot學習-controller的使用

新建HelloController類
添加註解

@RestController　　//等同於@Controller+@ResponseBody
@RequestMapping(value = "hello")　　//訪問此controller類時, hello爲'父'路徑    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") 獲取restful路徑中的參數 localhost:8080/hello/say/123 id==123
 return id;
 }

　　public String say(@RequestParam(value = "id",requied=false,defaultValue="0") Integer id){　　//@RequestParam 路徑訪問形式爲帶參數 localhost:8080/hello/say?id=123   requied必填  defaultValue默認值        return id;    }}