自定义视图可以整合jfreechart、excel    @RequestMapping("/testView")    public String testView(){        System.out.println("testView");        return "helloView";    }@Componentpublic class HelloView implements View{    @Override    public String getContentType() {        return "text/html";    }    @Override    public void render(Map
     
       model, HttpServletRequest request,            HttpServletResponse response) throws Exception {        response.getWriter().print("hello view, time: " + new Date());    }}