Java 用于void下载方法的Spring HATEOAS模板链接

我的控制器中有一个方法，如下所示：

    @RequestMapping(value = "/download/attachment/{attachmentId}", method = RequestMethod.GET)
public void download(@PathVariable("attachmentId") String attachmentId, HttpServletRequest request,
        HttpServletResponse response) throws IOException {
    InputStream file = myCustomObject.getAttachmentById(attachmentId);
    response.setContentType("application/octet-stream");
    response.flushBuffer();
}

我想使用Spring提供的ControllerLinkBuilder类生成指向此方法的模板化HATEOAS链接。我的链接应该如下所示：

"download" : {
          "href" : "https://localhost:8080/download/attachment/{attachmentId}"
}

我在我的ResourceAssembler类（扩展了ResourceAssemblerSupport）中使用以下代码来实现这一点：

---

我从中得到的链接不是模板。它是URL编码的。“{”以%7B的形式发送。我不希望发生这种情况。有人能提出任何建议吗？

好的，因此我使用以下方法解决了此问题：

            Link downloadAttachmentByIdLink = new Link(
                new UriTemplate(
                        linkTo(MyRestController.class,
                                MyRestController.class.getMethod("download", String.class,
                                        HttpServletRequest.class, HttpServletResponse.class),
                                "").toUriComponentsBuilder().build().toUriString(),
                        new TemplateVariables(
                                new TemplateVariable("attachmentId", TemplateVariable.VariableType.SEGMENT))),
                "download");

            Link downloadAttachmentByIdLink = new Link(
                new UriTemplate(
                        linkTo(MyRestController.class,
                                MyRestController.class.getMethod("download", String.class,
                                        HttpServletRequest.class, HttpServletResponse.class),
                                "").toUriComponentsBuilder().build().toUriString(),
                        new TemplateVariables(
                                new TemplateVariable("attachmentId", TemplateVariable.VariableType.SEGMENT))),
                "download");