我正在尝试构建messanger应用程序。
我要从MessageResource调用CommentResource。
我想要单独的MessageResources和CommentResources。
我正在做这样的事情:
MessageResource.java
@RestController
@RequestMapping("/messages")
public class MessageResource {
MessageService messageService = new MessageService();
@RequestMapping(value = "/{messageId}/comments")
public CommentResource getCommentResource() {
return new CommentResource();
}
}
CommentResource.java
@RestController
@RequestMapping("/")
public class CommentResource {
private CommentService commentService = new CommentService();
@RequestMapping(method = RequestMethod.GET, value="/abc")
public String test2() {
return "this is test comment";
}
}
我想要
http://localhost:8080/messages/1/comments/abc
返回“这是测试评论”。
任何想法?
PS:简单来说,我想知道JAX-RS sub-resource
中的spring-rest
等效实现
答案 0 :(得分:7)
您的网址(http://localhost:8080/messages/1/comments/abc)表明评论嵌套在邮件中。您的控制器应如下所示:
@RestController
@RequestMapping("/messages")
public class MessageResource {
@RequestMapping(value = "/{messageId}")
public String getCommentResource(@PathVariable("messageId") String messageId) {
//test
return messageId;
}
@RequestMapping(value = "/{messageId}/comments/{commentsContent}")
public String getCommentResource(
@PathVariable("messageId") String messageId,
@PathVariable("commentsContent") String commentsContent) {
//test
return messageId + "/" + commentsContent;
}
}
我不完全确定你想在MessageResource类中做什么,但是这个想法就在那里。
目前,这些用途是Get请求。但是,您应该考虑使用适当的Http方法:
看看这个:http://www.restapitutorial.com/lessons/httpmethods.html
@RequestMapping(method=RequestMethod.POST, value = "/{messageId}/comments/{commentsContent}")
public ResponseEntity<String> getCommentResource(
@PathVariable("messageId") String messageId,
@RequestBody Comment comment) {
//fetch the message associated with messageId
//add the comment to the message
//return success
return new ResponseEntity<String>(HttpStatus.OK);
}
另外,我个人会将这些类重命名为MessageController和CommentController。
你可以直接拆分控制器(更接近你所拥有的):
@RestController
@RequestMapping("/messages")
public class MessageResource {
@RequestMapping(value = "/{messageId}")
public String getCommentResource(@PathVariable("messageId") String messageId) {
//test
return messageId;
}
}
@RestController
@RequestMapping("/messages")
public class CommentResource {
@RequestMapping(value = "/{messageId}/comments/{commentsContent}")
public String getCommentResource(
@PathVariable("messageId") String messageId,
@PathVariable("commentsContent") String commentsContent) {
//test
return messageId + "/" + commentsContent;
}
}
答案 1 :(得分:3)
JAX-RS
实施支持您所寻找的内容,例如Jersey,并称为Sub-Resources
。在构建大型嵌套的API时,子资源是一个非常有用的功能。
Spring Boot默认休息实现不是JAX-RS
而是SpringMVC
。虽然可以在Spring Boot中使用Jersey,但它有点涉及尝试设置它,并且在社区中似乎没有得到很好的使用/支持。
另一方面,DropWizard太棒了!
答案 2 :(得分:3)
在Spring引导中,我们可以使用 @Autowired Spring Concept来实现JAX-RS子资源概念。创建您的子资源类的对象,Spring将在运行时初始化并返回该对象。不要手动创建对象。 喜欢: 上面提到的场景
- MessageResource.java
@RestController
@RequestMapping("/messages")
public class MessageResource {
MessageService messageService = new MessageService();
@Autowired
@Qualifier("comment")
CommentResource comment;
@RequestMapping(value = "/{messageId}/comments")
public CommentResource getCommentResource() {
return comment;
}
}
- CommentResource.java
@RestController("comment")
@RequestMapping("/")
public class CommentResource {
private CommentService commentService = new CommentService();
@RequestMapping(method = RequestMethod.GET, value="/abc")
public String test2() {
return "this is test comment";
}
}
Now it will work like sub-resource
http://localhost:8080/messages/1/comments/abc
You can send any type of request.
答案 3 :(得分:1)
我也被迫从JAX-RS迁移到Spring-MVC。
我仍然在寻找一种优雅的方式,就像我使用JAX-RS一样。
我正在分享我尝试过的东西。
@RestController
@RequestMapping("parents")
public class ParentsController {
@RequestMapping(method = RequestMethod.GET,
produces = {MediaType.APPLICATION_JSON_VALUE})
public ResponseEntity<List<Parent>> read() {
}
@RequestMapping(method = RequestMethod.GET,
path = "/{id:\\d+}",
produces = {MediaType.APPLICATION_JSON_VALUE})
public ResponseEntity<Parent> read(@PathVariable("id") final long id) {
}
}
ChildrenController
。
@RestController
@RequestMapping("/parents/{parentId:\\d+}/children")
public class ChildrenController {
@RequestMapping(method = RequestMethod.GET,
produces = {MediaType.APPLICATION_JSON_VALUE})
@ResponseBody
public List<Child> read(@PathVariable("parentId") final long parentId) {
}
@RequestMapping(method = RequestMethod.GET, path = "/{id:\\d+}",
produces = {MediaType.APPLICATION_JSON_VALUE})
@ResponseBody
public Child read(@PathVariable("parentId") final long parentId,
@PathVariable("id") final long id) {
}
}
我发现了两个问题,
@PathVariable
不适用于字段。我不能@PathVariable("parentId") private long parentId;
ChildrenController
JAX-RS的一个美妙之处在于我们可以将ChildrenController
映射到不同的路径,就像ChildrenController
有一个类级别@Path
一样。
@Path("/children");
public class ChildrenResource {
}
@Path("/parents")
public class ParentsResource {
@Path("/{id}/children")
public ChildrenResource resourceChildren() {
}
}
/children
/parents/{id}/children
答案 4 :(得分:1)
只需创建两个类并使用常量来引用子资源和父资源。这有助于在两个类之间建立链接,并使开发人员了解它们之间的关系。
所以:
@RequestMapping(value= MessageController.URL)
public class MessageController {
public static final String URL= "/messages";
}
和
@RequestMapping(value = MessageController.URL + "/{idMessage}/comments")
public class CommentController {
}
您还可以将控制器拆分到不同的包中,在包组织中也显示此层次结构:
com.company.web.message.MessageController
com.company.web.message.comment.CommentController
答案 5 :(得分:0)
MessagesController.java
@RestController
@RequestMapping(value = "/messages")
public class MessageController {
@Autowired
private MessagesService messageService;
}
CommentController.java
@RestController
@RequestMapping("/messages/{messageId}/comments")
public class CommentController {
@GetMapping
public List<Comment> getComments(@PathVariable("messageId") Long messageId) {
System.out.println("Get "+messageId);
return null;
}
}
答案 6 :(得分:0)
MessageResource.java
@RestController
@RequestMapping("/messages")
public class MessageResource {
MessageService messageService = new MessageService();
// as usual messages related CRUD operations
}
CommentResource.java
@RestController
@RequestMapping("messages/{messageId}/comments")
public class CommentResource {
private CommentService commentService = new CommentService();
@RequestMapping(method = RequestMethod.GET, value="/abc")
public String test2() {
return "this is test comment";
}
}