java http 路径的处理程序方法不明确？
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Ambiguous handler methods for http path?
提问by user1871869
I have a Spring application where I declared my class like so:
我有一个 Spring 应用程序，我在其中声明了我的类：
@Controller
@RequestMapping(value = "/rest/api/datasources/", produces = MediaType.APPLICATION_JSON_VALUE, method=RequestMethod.GET)
public class MetadataServiceController {
//Two separate methods:
@RequestMapping(value="{datasourceName}")
public Object getLatestApiMetadata(@PathVariable String datasource,
@RequestParam (required = false) String datasourceNum,
@RequestParam (defaultValue = "true") String dataFields,
@RequestParam ( required=false, defaultValue = "api") String visibility){
... //Implementation here
}
@RequestMapping(value="{apiVersion}")
public @ResponseBody List<DataSource> getAllMetadata(
@RequestHeader(value="sub-version", required=false, defaultValue="0.0") String minorVer,
@PathVariable String restApiVersion,
@RequestParam(required = false) String datasourceNum,
@RequestParam(defaultValue = "all") String visibility)
throws ObjectNotFoundException {
... //Implementation here
}
}
But when I try to reach one of these rest endpoints, I get an error saying: java.lang.IllegalStateException: Ambiguous handler methods mapped for HTTP pathand it specifies those two methods as the issue. I was under the impression that if I change the request parameters, Spring would not complain about them being the same via this post: http://www.coderanch.com/t/598675/Spring/handling-HTTP-Request-parametersbut clearly it still does. Would anyone have any suggestions on how to get around this? Thanks!
但是，当我尝试到达这些其余端点之一时，我收到一条错误消息：java.lang.IllegalStateException: Ambiguous handler methods mapped for HTTP path并将这两种方法指定为问题。我的印象是，如果我更改请求参数，Spring 不会通过这篇文章抱怨它们相同：http: //www.coderanch.com/t/598675/Spring/handling-HTTP-Request-parameters但是显然它仍然如此。有人会对如何解决这个问题有任何建议吗？谢谢！
回答by Tim Bender
What is important to Spring to dispatch the request is the Path portion of the URL.
对于 Spring 分派请求来说，重要的是 URL 的 Path 部分。
Both request mappings capture any value placed in the path and it is impossible to distinguish which method should be invoked. In your example code, a request to www.example.com/rest/api/datasources/foocould be handled by getLatestApiMetadatawhere "foo" is the datasourceNameand also handled by getAllMetadatawhere "foo" is the apiVersion.
两个请求映射都捕获放置在路径中的任何值，并且无法区分应该调用哪个方法。在您的示例代码中，请求www.example.com/rest/api/datasources/foo可以由getLatestApiMetadata“foo”所在的位置处理，也可以由“foo”所在的位置datasourceName处理。getAllMetadataapiVersion
