大佬们好，最近我在学习康师傅的博客系统，看视频学习到P67，写友情链接接口的时候，添加友情链接的post接口一直添加失败，springboot的报错是

[http-nio-8080-exec-6] [WARN ] [org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver] : Resolved [org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'POST' not supported]

一直排查不出怎么解决，想问下大佬们我是哪里弄错了。

FriendLinkAdminApi的代码如下：（添加友情链接以外的地方还没开始写）

@RestController
@RequestMapping("/admin/friend_link")
public class FriendLinkAdminApi {


    @Autowired
    private IFriendLinkService friendLinkService;


    @PreAuthorize("@permission.admin()")
    @PostMapping
    public ResponseResult addFriendLink(@RequestBody FriendLink friendLink) {
        return friendLinkService.addFriendLink(friendLink);
    }


    @PreAuthorize("@permission.admin()")
    @DeleteMapping("/{friendLinkId}")
    public ResponseResult deleteFriendLink(@PathVariable("friendLinkId") String friendLinkId) {
        return null;
    }


    @PreAuthorize("@permission.admin()")
    @PutMapping("/{friendLinkId}")
    public ResponseResult updateFriendLink(@PathVariable("friendLinkId") String friendLinkId) {
        return null;
    }


    @PreAuthorize("@permission.admin()")
    @GetMapping("/{friendLinkId}")
    public ResponseResult getFriendLink(@PathVariable("friendLinkId") String imageId) {
        return null;
    }


    @PreAuthorize("@permission.admin()")
    @GetMapping("/list")
    public ResponseResult listFriendLinks(@RequestParam("page") int page, @RequestParam("size") int size) {
        return null;
    }
}

IFriendLinkService:

public interface IFriendLinkService {
    ResponseResult addFriendLink(FriendLink friendLink);
}

FriendLinkServiceImpl:

@Log
@Service
@Transactional
public class FriendLinkServiceImpl implements IFriendLinkService {


    @Autowired
    private IdWorker idWorker;


    @Autowired
    private FriendLinkDao friendLinkDao;


    @Override
    public ResponseResult addFriendLink(FriendLink friendLink) {
        String url = friendLink.getUrl();
        if (!TextUtils.isEmpty(url)) {
            return ResponseResult.FAILED("url cannot empty");
        }


        String logo = friendLink.getLogo();
        if (!TextUtils.isEmpty(logo)) {
            return ResponseResult.FAILED("logo cannot be empty");
        }


        String name = friendLink.getName();
        if (!TextUtils.isEmpty(name)) {
            return ResponseResult.FAILED("name cannot be empty");
        }


        friendLink.setId(idWorker.nextId() + "");
        friendLink.setCreateTime(new Date());
        friendLink.setUpdateTime(new Date());


        friendLinkDao.save(friendLink);
        return ResponseResult.SUCCESS("friend lind added success");
    }
}

FriendLink pojo:

@Data
@Entity
@Table ( name ="tb_friends" )
public class FriendLink {

   @Id
   private String id;

   @Column(name = "name")
   private String name;

   @Column(name = "logo")
   private String logo;

   @Column(name = "url")
   private String url;

   @Column(name = "`order`")
   private long order = 1;

   @Column(name = "state")
   private String state = "1";

   @Column(name = "create_time")
   private Date createTime;

   @Column(name = "update_time")
   private Date updateTime;
}

谢谢大佬的指教！