我是 Spring MVC 的新手,我正在尝试使用 Spring MVC + Hibernate 从头开始构建 Web 应用程序,以提供类似于 JSON Rest API 的服务,并通过客户端的 Backbone 使用此 API。为此,我已开始遵循本教程 ( http://www.mkyong.com/spring-mvc/spring-3-mvc-and-json-example/ )。
So I have a model Message which will have the following REST API Interface:
GET /api/messages ( working ok )
GET /api/messages/:id ( working ok )
DELETE /api/messages/:id ( working ok )
PUT /api/messages/:id ( working ok )
POST /api/messages ( error: (DefaultHandlerExceptionResolver.java:194) - Request method 'POST' not supported)
我预计在通过表单执行请求时 PUT 或 DELETE 请求会发生此问题,但不会发生在 POST 请求中。我什至没有通过表格提出请求。在客户端,请求是通过 Backbone 完成的,如下所示:
new App.Models.Message({ attributeA : 'a', attributeB : 'b' }).save();
我已经尝试按照其他 Stackoverflow 问题中的建议在 web.xml 中添加 httpMethodFilter:
<filter>
<filter-name>httpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>httpMethodFilter</filter-name>
<servlet-name>mvc-dispatcher</servlet-name>
</filter-mapping>
有没有人有同样的问题?
我把我的 MessagesController 留在这里:
@Controller
@RequestMapping("/api/messages")
public class MessagesController {
@Autowired
private MessageService messageService;
@RequestMapping(method = RequestMethod.GET)
public @ResponseBody List<Message> getMessagesInJSON(@RequestParam( value = "type", required = false ) String type) {
List<Message> messages = messageService.findAll();
return messages;
}
@RequestMapping( value = "/{id}", method = RequestMethod.GET )
public @ResponseBody Message getMessageInJson(@PathVariable Integer id ) {
Message message = messageService.findById(id);
return message;
}
@RequestMapping( value = "/{id}", method = RequestMethod.DELETE )
@ResponseStatus( value = HttpStatus.NO_CONTENT )
public void deleteMessage(@PathVariable Integer id ) throws NotFoundException {
messageService.delete(id);
}
@RequestMapping( value = "/{id}", method = RequestMethod.PUT )
@ResponseStatus( value = HttpStatus.NO_CONTENT )
public void editMessage( @PathVariable Integer id, @RequestBody Message message ) throws NotFoundException {
message.setId(id);
messageService.update(message);
}
@RequestMapping( value = "/", method = RequestMethod.POST )
@ResponseStatus(HttpStatus.CREATED)
public @ResponseBody Message createMessage( @RequestBody Message message ) {
return messageService.create(message);
}
}
非常感谢!