springmv controller之间如何共享数据?

Question

controller类如下:

 package demo;

@Controller
public class DemoController {
    @RequestMapping("/index")
    public String index(Model model) {
        model.addAttribute("attr","hello");
        return "index";
    }
    @RequestMapping("/nav/{navid}")
    public String index(@PathVariable("navid") Integer navId, Model model) {
        model.addAttribute("param","my keyword");
        return "nav";
    }
}

index.jsp页面中有一个链接访问"/nav/{navid}",当我从index.jsp中点击链接访问"/nav/{navid}"跳转到nav页面后,在nav页面应该如何显示attr的值?或者说怎么修改controller类,才能让nav页面能访问到attr的值?

Answer 1

你这样应该就直接${attr}取出来了吧？取不出来的话试试 用ModelMap ，用 map.put("attr","hello"), 或者用session