一、返回页面数据 ：Model
1. HttpServletRequest request 直接使用 request.setAttribute("user", str);
2. 使用 ModelAndView
3. 使用 Model
4. 使用 Map
@RequestMapping(value="/add1.do")
public String add(HttpServletRequest request){
//System.out.println("------ 添加用户信息 ------");
String name = request.getParameter("username");
String pass = request.getParameter("password");
System.out.println("username:" + name + " password: " + pass);
String str = "username:" + name + " password: " + pass;
request.setAttribute("user", str);
return "user_add1";
}
@RequestMapping(value="/add2.do")
public ModelAndView add2(){
ModelAndView mav = new ModelAndView();
mav.addObject("userId",1001);
mav.addObject("username", "柳岩");
mav.setViewName("user_add2");
return mav;
}
@RequestMapping(value="/add3.do")
public String add3(Model model){
model.addAttribute("userId", 10086);
model.addAttribute("username", "柳岩");
return "user_add3";
}
@RequestMapping(value="/add4.do")
public String add4(Map map){
System.out.println(map.get("username"));
map.put("userId", 12306);
map.put("username", "柳岩");
return "user_add4";
}
