前面都能正常执行到这里卡住了，无法启动成功

Question

@RestController
@RequestMapping("/hello")
public class HelloController {

   /* @Value("${cupSize}")
    private String cupSize;
    @Value("${age}")
    private int age;
    @Value("${content}")
    private String content;*/
    @Autowired
    private GirlProperties girlProperties;

    @GetMapping("/say/${id}")
    public String say(@PathVariable("id")Integer id){
        //return girlProperties.getCupSize();
        //return "index";
        return "id: " + id;
    }

}

Answer 1

@GetMapping("/say/${id}")更改为@GetMapping("/say/{id}")@GetMapping("/say/{id}") public String say(@PathVariable("id") Integer id) {     return "id=" + id; }

Answer 2

什么错？报什么异常