springMVC两个Controller传递参数

/**
*ControllerA的代码
**/
@RequestMapping("addComment")
    public String addComment(Comment comment,Model model){
        if(cs.addComment(comment)){
            model.addAttribute("id",comment.getCommentBookId());
            //一定要加重定向
            return "redirect:getBookDetail.action";
        }
        return "fail.jsp";
    } 
/**
*ControllerB的代码
**/
@RequestMapping("getBookDetail")
    public String getBookDetail(Model model,@RequestParam(value="id",required=true)int id){
        Book book = bs.getBookById(id);
        model.addAttribute("book",book);
        return "bookDetail.jsp";
    }