Java 如何在spring控制器类中使用path变量？

我希望可以在类本身上方定义的Requestmapping注释中使用路径变量。 然而，我不能让它工作。我错过了什么

我的控制器类：

@Slf4j
@RestController
@RequestMapping(value = "{conncetion_name}/widget")
public class WidgetController {

private PortsRepository portsRepository;
private PortsService portsService;

@Autowired
public WidgetController(PortsRepository portsRepository, PortsService portsService) {
    this.portsRepository = portsRepository;
    this.portsService = portsService;
}

@RequestMapping(value = "/getBulkdata")
public List<TransferObject> getBulkData(@PathVariable(value="connection_name") String connectionName){

    return portsService.convertPortsToTransferObject(portsRepository.findByroomTypeIsNotNull());

}
}

---

这里缺少什么？

路径变量的Requestmapping注释：-

@RestController
@RequestMapping("/cities")
public class CityController {

private static final Logger logger = LoggerFactory.getLogger(CityController.class);

@Autowired
private CityService cityService;

@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public RestResponse find(@PathVariable("id") Long id) {
.
.
.   
}

或者您也可以这样使用：-

@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public List<City> find(@PathVariable("id") Long id) {
.
.
.   
}

---

仔细检查你的代码。。。比较两个名字。。。或者给你一个更近的提示连接名称！=显然，你是对的！

@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public List<City> find(@PathVariable("id") Long id) {
.
.
.   
}