SpringMVC中ModelAndView addObject()設置的值jsp取不到的問題

controller

public class HelloWorldController implements Controller {
public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
//1、收集參數、驗證參數
//2、綁定參數到命令對象
//3、將命令對象傳入業務對象進行業務處理
//4、選擇下一個頁面
ModelAndView mv = new ModelAndView();
//添加模型數據 可以是任意的POJO對象
mv.addObject("message", "Hello World!!!!");
//設置邏輯視圖名，視圖解析器會根據該名字解析到具體的視圖頁面
mv.setViewName("hello");
return mv;
}
}

jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>

${message} message=<%=request.getParameter("message")%>

web.xml

Archetype Created Web Application mymvct org.springframework.web.servlet.DispatcherServlet 1 mymvct /

mymvct-servlet.xml

<!-- HandlerMapping -->
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>

<!-- HandlerAdapter -->
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>

<!-- ViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
    <property name="prefix" value="/pages/"/>
    <property name="suffix" value=".jsp"/>
</bean>

<!-- 處理器 -->
<bean name="/hello" class="cn.myspringmvct.chapter2.web.controller.HelloWorldController"/>

在csdn論壇找到了問題的原因：maven自動生成的web.xml有問題，schema寫的不對，修改后可以正確取值：
web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app  version="2.5"
        xmlns="http://java.sun.com/xml/ns/javaee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
        http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <display-name>Archetype Created Web Application</display-name>

  <servlet>
    <servlet-name>mymvct</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>mymvct</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>