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 Map<String, String> index3(){
Map<String, String> map = new HashMap<String, String>();
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;
}
//通过配合@ResponseBody来将内容或者对象作为HTTP响应正文返回（适合做即时校验）；
@RequestMapping(value = "/valid", method = RequestMethod.GET)
@ResponseBody
public String valid(@RequestParam(value = "userId", required = false) Integer userId,
@RequestParam(value = "name") String name) {
return String.valueOf(true);
}
//返回字符串表示一个视图名称，这个时候如果需要在渲染视图的过程中需要模型的话，就可以给处理器添加一个模型参数，然后在方法体往模型添加值就可以了，
@RequestMapping(method=RequestMethod.GET)
public void index5(){
ModelAndView modelAndView = new ModelAndView();
modelAndView.addObject("xxx", "xxx");
}
//返回的结果页面还是：/type
//这个时候我们一般是将返回结果写在了HttpServletResponse 中了，如果没写的话，
//spring就会利用RequestToViewNameTranslator 来返回一个对应的视图名称。如果这个时候需要模型的话，处理方法和返回字符串的情况是相同的。
}
- 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;
-
-
-
-
-
-
- @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;
- }
-
-
- @RequestMapping(value="/index2",method=RequestMethod.GET)
- public ModelAndView index2(){
- ModelAndView modelAndView = new ModelAndView();
- modelAndView.addObject("name", "xxx");
- modelAndView.setViewName("/user/index");
- return modelAndView;
- }
-
-
-
-
-
-
-
-
- @RequestMapping(value="/index3",method=RequestMethod.GET)
- public Map<String, String> index3(){
- Map<String, String> map = new HashMap<String, String>();
- map.put("1", "1");
-
- return map;
- }
-
-
-
-
- @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;
- }
-
-
- @RequestMapping(value = "/valid", method = RequestMethod.GET)
- @ResponseBody
- public String valid(@RequestParam(value = "userId", required = false) Integer userId,
- @RequestParam(value = "name") String name) {
- return String.valueOf(true);
- }
-
-
-
- @RequestMapping(method=RequestMethod.GET)
- public void index5(){
- ModelAndView modelAndView = new ModelAndView();
- modelAndView.addObject("xxx", "xxx");
- }
-
-
-
-
- }