SpringMVC的几种返回方式
package com.boventech.learning.controller;
import java.util.HashMap;
import java.util.Map;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import com.boventech.learning.entity.User;
/**
* MVCReturn
* @author peng.xia
*
*/
@Controller
@RequestMapping("/MVCReturn")
public class SpringMVCReturnController {
@RequestMapping(value="/index1",method=RequestMethod.GET)
public ModelAndView index(){
ModelAndView modelAndView = new ModelAndView("/user/index");
modelAndView.addObject("name", "xxx");
return modelAndView;
}
//对于ModelAndView构造函数可以指定返回页面的名称,也可以通过setViewName方法来设置所需要跳转的页面;
@RequestMapping(value="/index2",method=RequestMethod.GET)
public ModelAndView index2(){
ModelAndView modelAndView = new ModelAndView();
modelAndView.addObject("name", "xxx");
modelAndView.setViewName("/user/index");
return modelAndView;
}
//返回的是一个包含模型和视图的ModelAndView对象;
/**
* Model一个模型对象,
* 主要包含spring封装好的model和modelMap,以及java.util.Map,
* 当没有视图返回的时候视图名称将由requestToViewNameTranslator决定;
* @return
*/
@RequestMapping(value="/index3",method=RequestMethod.GET)
public Mapindex3(){
Mapmap = new HashMap ();
map.put("1", "1");
//map.put相当于request.setAttribute方法
return map;
}
//响应的view应该也是该请求的view。等同于void返回。
//返回String
//通过model进行使用
@RequestMapping(value="/index4",method = RequestMethod.GET)
public String index(Model model) {
String retVal = "user/index";
User user = new User();
user.setName("XXX");
model.addAttribute("user", user);
return retVal;
}