尝试手动将Spring MVC视图呈现为html。但是不会填充模型数据

Question

这就是我要达到的目的：

View pdfView = this.viewResolver.resolveViewName("documentTesting", Locale.US);
MockHttpServletResponse mockResp = new MockHttpServletResponse();

model.addAttribute("firstName", firstName);
pdfView.render(model.asMap(), request, mockResp);

String html = mockResp.getContentAsString();
System.out.println("rendered html : " + html);