java - Spring 将 @PathVariable 绑定(bind)到 JavaBean

Question

我尝试在 Spring Controller 中绑定(bind)一个对象，以便它可以用作 @PathVariable。我想这样做，因为我想传递一些 @PathVariable。我已经尝试了 Bind Path variables to a custom model object in spring 的解决方案还有Is it possible to bind path variable and request param into a single object? .但两者都不起作用。

我在我的 Controller 中创建了类似的东西。

@RestController
@RequestMapping("/buildings")
@RequiredArgsConstructor
public class BuildingController {

    private final BuildingService buildingService;

    @GetMapping("/{buildingId}/floors/{floorId}/rooms/{roomId}/sections")
    public Flux<SectionDTO> getRoomSections(BuildingRequestBean request) {
        return this.buildingService.getRoomSections(request);
    }
}

和BuildingRequestBean.java这样

@Getter
@Setter
public class BuildingRequestBean {

  private String buildingId;

  private String floorId;

  private String roomId;
}

当我检查 BuildingRequestBean 时，当我使用 GET localhost:8080/buildings/a/floors/b/rooms/c/sections 调用它时，属性为空。但是，如果我将它称为 @RequestParam，它不会为 null，就像这样 GET localhost:8080/buildings/{buildingId}/floors/{floorId}/rooms/{roomId}/sections?buildingId=a&floorId=b&roomId=c

如何修复它，使其表现得像 @PathVariable 而不是表现得像 @RequestParam？

Answer 1

你可以使用@ModelAttribute获取它

试试这个:

@GetMapping("/{buildingId}/floors/{floorId}/rooms/{roomId}/sections")
    public Flux<SectionDTO> getRoomSections(@ModelAttribute BuildingRequestBean request) {
        return this.buildingService.getRoomSections(request);
    }