java - 如何手动将 Spring MVC View 呈现为 html？

Question

是否可以在我的 Controller 映射方法中将我的 View 呈现为 html，以便我可以将呈现的 html 作为我的 json 对象的一部分返回？

我常用的 Controller 方法示例:

@RequestMapping(value={"/accounts/{accountId}"}, method=RequestMethod.GET)
public String viewAcc(final HttpServletRequest req, 
        final HttpServletResponse resp, final Model model,
        @PathVariable("accountId") final String docId) {

    // do usual processing ...

    // return only a STRING value, 
    //   which will be used by spring MVC to resolve into myview.jsp or myview.ftl
    //   and populate the model to the template to result in html
    return "myview";
}

我的期望:

@RequestMapping(value={"/accounts/{accountId}"}, method=RequestMethod.GET)
public String viewAcc(final HttpServletRequest req, 
        final HttpServletResponse resp, final Model model,
        @PathVariable("accountId") final String docId) {

    // do usual processing ...

    // manually create the view
    ModelAndView view = ... ? (how)

    // translate the view to the html
    //   and get the rendered html from the view
    String renderedHtml = view.render .. ? (how)

    // create a json containing the html
    String jsonString = "{ 'html' : " + escapeForJson(renderedHtml) + "}"

    try {
        out = response.getWriter();
        out.write(jsonString);
    } catch (IOException e) {
        // handle the exception somehow
    }

    return null;
}

我想知道在 Controller 方法中手动创建 View 并将 View 渲染为 html 的正确方法是什么。

更新

这是已接受答案指南中的工作示例:

View resolvedView = thiz.viewResolver.resolveViewName("myViewName", Locale.US);
MockHttpServletResponse mockResp = new MockHttpServletResponse();
resolvedView.render(model.asMap(), req, mockResp);
System.out.println("rendered html : " + mockResp.getContentAsString());

Answer 1

尝试 Autowiring ViewResolver，然后调用 resolveViewName("myview", Locale.US) 来获取 View 。

然后在 View 上调用 render()，向其传递一个“模拟”HTTP 响应，该响应具有一个 ByteArrayOutputStream 作为其输出，并从 ByteArrayOutputStream 中获取 HTML。

更新

这是从问题中复制的工作示例。 (所以代码其实是有答案的)

View resolvedView = thiz.viewResolver.resolveViewName("myViewName", Locale.US);
MockHttpServletResponse mockResp = new MockHttpServletResponse();
resolvedView.render(model.asMap(), req, mockResp);
System.out.println("rendered html : " + mockResp.getContentAsString());