SpringMVC 跨重定向请求传递数据的方法实现

@GetMapping("/home/index")
  public String index(Model model){
    Meinv meinv = new Meinv("gaoxing",22);
    model.addAttribute("lastName",meinv.getLastName());
    model.addAttribute("age",meinv.getAge());
    return "redirect:/home/details/{lastName}";
  }

  @GetMapping("/home/details/{lastName}")
  public String details(@PathVariable String lastName, @RequestParam Integer age){
    System.out.println(lastName);
    System.out.println(age);
    return "home";
  }

@GetMapping("/home/index")
  public String index(RedirectAttributes model){
    Meinv meinv = new Meinv("gaoxing",22);
    model.addAttribute("lastName",meinv.getLastName());
    model.addFlashAttribute("meinv",meinv);
    return "redirect:/home/details/{lastName}";
  }

  @GetMapping("/home/details/{lastName}")
  public String details(@PathVariable String lastName, Model model){
    Meinv meinv = null;
    if(model.containsAttribute("meinv")){
      meinv = (Meinv) model.asMap().get("meinv");
    }
    System.out.println(meinv);
    return "home";
  }