總結
ModelAndView的簡單使用
1）配製InternalResourceViewResolver的bean
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
2）前端
index.jsp
index.jsp
<form action="helloworld" method="post">
用戶名：<input type="text" name="username"><br/>
密碼：<input type="password" name ="password"><br/>
身高：<input type="text" name="height"><br/>
省份：<input type="text" name=address.province><br/>
城市：<input type="text" name="address.city"><br/>
<input type="submit" value="提交">
</form>
success.jsp
<body>
<h1>Success Page</h1>
<%= request.getAttribute("user") %>
</body>
3）handler處理器
@Controller
public class Distributor {
// @ModelAttribute
//public void attributeMethod(Map<String,Object>map)
@RequestMapping(value = "/helloworld", method = RequestMethod.POST)
public ModelAndView distribute2Success2(User user) {
ModelAndView mv = new ModelAndView("success");
mv.addObject("user", user);
return mv;
}
}
4)效果
@ModelAttribute的簡單使用
1）handler處理器
@Controller
public class Distributor {
/**
* 在進入目標頁面之前的處理
* @param map
*/
@ModelAttribute
public void attributeMethod(Map<String, Object> map) {
map.put("school", "南京郵電大學");
}
/**
* 目標頁面，從從implicitModel中取出參數
* @param school
* @return
*/
@RequestMapping(value = "/helloworld", method = RequestMethod.POST)
public ModelAndView distribute2Success2(@ModelAttribute(value="school") String school) {
ModelAndView mv = new ModelAndView("success");
mv.addObject("school", school);
return mv;
}
}
2）success.jsp頁面
<body>
<h1>Success Page</h1>
<%= request.getAttribute("school") %>
</body>
3）效果
@SessionAttributes的使用
@SessionAttributes(types=User.class)
@Controller
public class Distributor {
@RequestMapping(value = "/helloworld", method = RequestMethod.POST)
public ModelAndView distribute2Success2(User user) {
ModelAndView mv = new ModelAndView("success");
mv.addObject("user", user);
return mv;
}
}
add進modelAndView中的對象的類型如果爲User.class,那麼該對象不僅會從modelAndView中讀出add進requestAttributes中外，還會add進seessionAttribute中
success.jsp
<body>
<h1>Success Page</h1>
<%= session.getAttribute("user") %>
</body>
