[【精品】SpringMVC返回结果页面的方式

水深无声 2022-08-31 00:49 137阅读 0赞

## 请求转发 ##

@RequestMapping("/f0")
    public String forward0() { 
        return "back/res"; //Spring框架找到对应的View并渲染
    }
    @RequestMapping("/f1")
    public String forward1(HttpServletRequest request) { 
        System.out.println(request.getAttribute("name"));
        return "back/res";
    }
    @RequestMapping("/f2")
    public ModelAndView forward2() { 
        ModelAndView mav = new ModelAndView("success");
    mav.addObject("name", "zhangsan");
        mav.setViewName("back/res");
        return mav; //Spring框架找到对应的View并渲染
    }
    @RequestMapping("/f3")
    public ModelAndView forward3(ModelAndView mav) { 
        mav.addObject("name","zhangsan");
        mav.setViewName("back/res");
        return mav;
    }
    @RequestMapping("/f4")
    public String forward4(HttpServletRequest request) { 
        request.setAttribute("name", "lisi");
        return "forward:f0";  // 请求转发
    }
    @RequestMapping("/f5")
    public String forward5(HttpServletRequest request) { 
        request.setAttribute("name","zhangsan");
        return "back/res"; //Spring框架找到对应的View并渲染
    }
    @RequestMapping("/f6")
    public void forward6(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException { 
        request.setAttribute("name", "zhangsan");
        //采用下面形式，配置文件中的视图解析器就不再起作用了
        request.getRequestDispatcher("/res.jsp").forward(request, response);//请求转发
    }

## 重定向 ##

@RequestMapping("/r10")
    public String redirect10(HttpServletRequest request) throws IOException { 
        System.out.println("name " + request.getAttribute("name"));
        return "redirect:../res.jsp";
    }
    @RequestMapping("/r11")
    public String redirect11(HttpServletRequest request) throws IOException { 
        request.setAttribute("name", "wanger");
        return "redirect:/demo/r10";
    }
    @RequestMapping("/r20")
    public String redirect20(RedirectAttributes attributes, @ModelAttribute("name") String name) throws IOException { 
        attributes.addAttribute("name", name);
        return "back/res";
    }
    @RequestMapping("/r21")
    public String redirect21(RedirectAttributes attributes) throws IOException { 
        attributes.addAttribute("name", "wanger");
        return "redirect:/demo/r20";
    }
    //springmvc 和Servlet整合
    @RequestMapping("/r3")
    public void redirect3(HttpServletRequest request, HttpServletResponse response) throws IOException { 
        ServletContext servletContext = request.getSession().getServletContext();
        String contextPath = servletContext.getContextPath();
        response.sendRedirect(contextPath + "/res.jsp");//重定向
    }