1 package com.itdoc.springmvc.entities;
  2 
  3 import org.springframework.stereotype.Controller;
  4 import org.springframework.ui.Model;
  5 import org.springframework.ui.ModelMap;
  6 import org.springframework.web.bind.annotation.*;
  7 import org.springframework.web.servlet.ModelAndView;
  8 
  9 import java.util.Arrays;
 10 import java.util.Date;
 11 import java.util.List;
 12 import java.util.Map;
 13 
 14 /**
 15  * @BLOG http://www.cnblogs.com/goodcheap
 16  * @DESCRIBE
 17  * @AUTHOR WángChéngDá
 18  * @DATE 2017-03-09 13:55
 19  */
 20 @Controller
 21 /**
 22  * @SessionAttributes 只能定义在 Class, interface , enum 上。
 23  * @SessionAttributes 除了可以通过属性名指定需要放到会话中的属性外,
 24  * 还可以通过模型属性的对象类型指定哪些模型属性需要放到会话中。
 25  * Spring MVC 将在模型中对应的属性暂存到 HttpSession 中。
 26  * ?value:指定的属性名。可以是 String[] 类型的数据。
 27  * ?type:模型属性对应的类型。可以是 Class<?>[] 类型的数据。
 28  */
 29 //@SessionAttributes(value = http://www.mamicode.com/{"time", "names"}, types = {String.class, User.class})
 30 public class TestModelAndView {
 31 
 32     public static final String SUCCESS = "success";
 33 
 34     @ModelAttribute
 35     public void getUser(@RequestParam(value = "http://www.mamicode.com/id", required = false) Integer id,
 36                         Map map) {
 37         System.out.println("I am TestModelAndView‘s getUser method...");
 38         if (id != null) {
 39             //模拟从数据库获取对象
 40             User user = new User(1, "Tom", 12, "123456", "a@aaa.com");
 41             System.out.println("从数据库中获取一个对象: " + user);
 42             map.put("user", user);
 43         }
 44     }
 45 
 46 
 47     @RequestMapping(value = "http://www.mamicode.com/updateUser", method = RequestMethod.POST)
 48     public String updateUser(User user) {
 49         System.out.println("修改: " + user);
 50         return SUCCESS;
 51     }
 52 
 53     @RequestMapping("/getModel")
 54     public String getModel(Model model) {
 55         model.addAttribute("names", Arrays.asList("Tom", "Jack", "Lucy", "Mark"));
 56         model.addAttribute("time", new Date());
 57         model.addAttribute("school", "东北财经大学");
 58         model.addAttribute("user", new User("Tom", 13));
 59         return SUCCESS;
 60     }
 61 
 62     @RequestMapping("/getModelMap")
 63     public String getModelMap(ModelMap modelMap) {
 64         List<String> strings = Arrays.asList("Tom", "Jack", "Lucy", "Mark");
 65         modelMap.put("names", Arrays.asList("Tom", "Jack", "Lucy", "Mark"));
 66         modelMap.put("time", new Date());
 67         modelMap.put("school", "东北财经大学");
 68         modelMap.put("user", new User("Tom", 13));
 69         return SUCCESS;
 70     }
 71 
 72     /**
 73      * 目标方法的入参中包含 Map, Model, ModelMap 类型的数据, 返回值是 String 类型,
 74      * Spring MVC 会自动把 Map, Model, ModelMap 转化成模型信息放入到 request 域对象中,
 75      * 把返回的 String 类型数据转化成视图信息。
 76      *
 77      * @param map
 78      * @return
 79      */
 80     @RequestMapping("/getMap")
 81     public String getMap(Map<String, Object> map, String name) {
 82         map.put("names", Arrays.asList("Tom", "Jack", "Lucy", "Mark"));
 83         map.put("time", new Date());
 84         map.put("school", "东北财经大学");
 85         map.put("user", new User("Tom", 13));
 86         return SUCCESS;
 87     }
 88 
 89     /**
 90      * 目标的返回值是 ModelAndView, 其中包含视图和模型信息。
 91      * SpringMVC 会把 ModelAndView 中的 model 模型放入到 request 域对象中。
 92      *
 93      * @return
 94      */
 95     @RequestMapping("/testModelAndView")
 96     public ModelAndView testModelAndView() {
 97         String viewName = SUCCESS;
 98         ModelAndView mv = new ModelAndView(viewName);
 99         mv.addObject("names", Arrays.asList("Tom", "Jack", "Lucy", "Mark"));
100         mv.addObject("time", new Date());
101         mv.addObject("school", "东北财经大学");
102         mv.addObject("user", new User("Tom", 13));
103         System.out.println(mv);
104         return mv;
105     }
106 }