java - Spring RequestMapping 通配符和后缀

Question

我想为这样的 URI 创建映射。

/reference/download/asdsa/asdas/sad/3c7d38f679a64d101c602da61dad9912.pdf

我的 Controller 中的请求映射是:

/reference/download/**

问题是，只有当我调用 不带 .pdf 后缀的 URI 时，映射才起作用。

这是我的代码:

@Controller
@RequestMapping("/reference")
public class ReferenceFilePageController
{
    private static final Logger LOG = Logger.getLogger(ReferenceFilePageController.class);

    private static final String PATH_VARIABLE_PATTERN_DOWNLOAD = "/download/**";

    @Autowired
    private ReferenceFileService referenceFileService;

    @RequestMapping(value = PATH_VARIABLE_PATTERN_DOWNLOAD, method = RequestMethod.GET, produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)
    @ResponseBody
    public FileSystemResource getFile(HttpServletRequest request) {
        String path = (String) request.getAttribute(HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE);

        return new FileSystemResource(referenceFileService.getPathForIdentifier(path.substring(19)));
    }

}

Answer 1

这称为Content Negotiation .