[英]Spring: Can I abstract my request mappings away to a base class?
My Spring Boot application has a bunch of REST controller classes, all of which perform more or less the same standard CRUD operations on their respective models, just with different endpoint names (one is /user
, one is /group
, etc).我的 Spring 引导应用程序有一堆 REST controller 类,所有这些类都在各自的模型上执行或多或少相同的标准 CRUD 操作(一个是/user
/group
,是等) It makes sense to pack this behaviour away in a base class, perhaps called Controller
.将此行为打包到基础 class 中是有意义的,可能称为Controller
。
Firstly, is there a base class like this in Spring already, which I've missed?首先,在 Spring 中是否有像这样的基础 class ,我错过了? It seems like handy behaviour that lots of people would need, so I'm surprised I can't find it.这似乎是很多人需要的方便行为,所以我很惊讶我找不到它。
If not, and I need to write it myself, my problem is: what do I do with the request mapping annotations, like @GetMapping
and @PostMapping
?如果没有,我需要自己编写,我的问题是:我该如何处理请求映射注释,例如@GetMapping
和@PostMapping
? Their value
argument has to be constant, so I can't just use the annotations in the superclass and interpolate each endpoint name into them, as in @GetMapping("/" + endpointName + "/{id}")
.它们的value
参数必须是常量,所以我不能只使用超类中的注释并将每个端点名称插入其中,如@GetMapping("/" + endpointName + "/{id}")
。 Do I write my request-handling methods without the annotations, then wrap and annotate them in each of my 5-6 subclasses, like this?我是否在没有注释的情况下编写我的请求处理方法,然后在我的 5-6 个子类中的每个子类中包装和注释它们,就像这样?
@RestController
public abstract class Controller<T> {
public ResponseEntity<T> create(T obj) {
// Creation behaviour
}
// Same for retrieve, update, etc
}
...
public class UserController extends Controller<User> {
@Override
@PostMapping("/user")
public ResponseEntity<User> create(@RequestBody User user) {
return super.create(user);
}
// Repeat for other operations
}
// and repeat for all the other subclasses
It seems a little redundant;似乎有点多余; I'd love it if there was a cleaner way.如果有更清洁的方法,我会喜欢的。
You can create a generic abstract controller for your CRUD mappings, like:您可以为您的 CRUD 映射创建通用抽象 controller,例如:
public abstract class AbstractGenericController<E extends yourGenericEntity> {
private static final Logger LOG = LoggerFactory.getLogger(AbstractGenericController.class);
@RequestMapping(value = "/create", method = RequestMethod.POST)
public ResponseEntity<GenericResult<T>> create(@RequestBody String input) {
// your process
}
@RequestMapping(value = "/update", method = RequestMethod.POST)
public ResponseEntity<GenericResult<T>> update(@RequestBody String input) {
// your process
}
Then your controller will extend the abstract controller.然后您的 controller 将扩展抽象 controller。
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