java - 如何在Spring Controller 类中使用路径变量？

Question

我have seen我可以在类本身上方定义的 Requestmapping 注释中使用路径变量。但是，我无法让它发挥作用。我在这里缺少什么？

我的 Controller 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());

}
}

当我尝试访问给定的网址时，我收到一条错误消息:

Sat May 13 17:47:05 CEST 2017
There was an unexpected error (type=Internal Server Error, status=500).
Missing URI template variable 'connection_name' for method parameter of type String

我在这里缺少什么？

Answer 1

路径变量的请求映射注释:-

@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) {
.
.
.   
}

或者你也可以这样使用:-

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