ModelAndView中使用RedirectView实现跳转

ModelAndView默认是使用转发(forward)方式来完成请求的结果画面，使用RedirectView的话，则会使用重新导向(Redirect)将请求重导到指定的结果位置。如：

java 代码HelloController

package org.beans;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import org.springframework.web.servlet.view.RedirectView;

public class HelloController implements Controller {
private String viewPage;
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        String user=request.getParameter("user");
        return new ModelAndView(viewPage,"user",user);
    }
    public void setViewPage(String viewPage) {
        this.viewPage = viewPage;
    }


}

xml 代码

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>
    <bean name="helloController" class="org.beans.HelloController"
        abstract="false" singleton="true" lazy-init="default"
        autowire="default" dependency-check="default">
        <property name="viewPage">
            <value>hello</value>
        </property>
    </bean>
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver"
        abstract="false" singleton="true" lazy-init="default"
        autowire="default" dependency-check="default">
        <property name="prefix">
            <value>/WEB-INF/jsp/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>

    <bean id="urlHandleMapping"
        class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"
        abstract="false" singleton="true" lazy-init="default"
        autowire="default" dependency-check="default">
        <property name="interceptors">
        <list>
    <ref bean="loggingInterceptor"/>
        </list>
        </property>
        <property name="mappings">
            <props>
                <prop key="/hello.do">helloController</prop>
            </props>
        </property>
    </bean>
    <bean id="loggingInterceptor" class="org.beans.LoggingInterceptor"
        abstract="false" singleton="true" lazy-init="default"
        autowire="default" dependency-check="default">
    </bean></beans>

根据如上配置如果将java 代码HelloController改成如下：

java 代码

package org.beans;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import org.springframework.web.servlet.view.RedirectView;

public class HelloController implements Controller {
private String viewPage;
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        String user=request.getParameter("user");
        return new ModelAndView(new RedirectView(viewPage),"user",user);
    }
    public void setViewPage(String viewPage) {
        this.viewPage = viewPage;
    }


}

则运行时出现错误。该怎么改呢？