当页面是jsp页面时,大多都是return 具体页面地址,该如何返回数据给前端呢?以下为后端返回数据到jsp页面上的方法。
页面userAdd.jsp。它既是发出请求的页面,也是接收返回结果的页面:
<%@ page language="java" import="java.util.*" contentType="text/html;charset=utf-8"%><html> <head> <title></title> </head> <body> <form action="user/add.do" method="post"> <input type="submit" value="提交"> </form> ${userId } </body></html> 1、通过request对象: @RequestMapping("/add")public String add(HttpServletRequest request){ request.setAttribute("userId",12); return "userAdd";} 2、通过ModelAndView对象: @RequestMapping("/add")public ModelAndView add(){ ModelAndView mav = new ModelAndView("userAdd"); mav.addObject("userId", 12); return mav;} 3、通过Model对象: @RequestMapping("/add")public String add(Model model){ model.addAttribute("userId", 12); return "userAdd";} 4、通过Map对象: @RequestMapping("/add")public String add(Map<String,Object> map){ map.put("userId", 12); return "userAdd";}