Spring MVC多视图配置

1.Spring配置的XML

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

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd ">
    <context:component-scan
     base-package="com.spring.action"/>
    
    <bean class="org.springframework.web.servlet.view.ResourceBundleViewResolver">
        <property name="basename" value="views">
        </property>
        
    </bean>
    
    <bean id="freemarkerConfig"

     class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
        
        <property name="templateLoaderPath" value="/WEB-INF/freemarker/"/>
    </bean>
   
   <bean id="velocityConfig"

   class="org.springframework.web.servlet.view.velocity.VelocityConfigurer">
       
       <property name="configLocation" value="/WEB-INF/velocity.properties"/>
       
       <property name="resourceLoaderPath" value="/WEB-INF/velocity/"/>
   </bean>
    <bean id="viewResolver"
     class="com.spring.action.MultiViewResover">
        <property name="resolvers">
            <map>
                <entry key="jsp">
                    <bean
                     class="org.springframework.web.servlet.view.InternalResourceViewResolver">
                        <property name="viewClass"
                         value="org.springframework.web.servlet.view.JstlView"/>
                        <property name="prefix" value="/WEB-INF/jsp/"/>
                        <property name="suffix" value=".jsp"/>
                    </bean>
                </entry>
                <entry key="ftl">
                    <bean
                     class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
                        <property name="cache" value="true"/>
                       <property name="prefix" value="/"/>
                       <property name="suffix" value=".ftl"/>
                    </bean>
                </entry>
                <entry key="vm">
                    <bean
                     class="org.springframework.web.servlet.view.velocity.VelocityViewResolver">
                        <property name="cache" value="true"/>
                       <property name="prefix" value="/"/>
                       <property name="suffix" value=".vm"/>
                    </bean>
                </entry>
            </map>
        </property>
    </bean>

</beans>

解析多视图请求的类

package com.spring.action;

import java.util.Locale;
import java.util.Map;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.ViewResolver;

/**
* @author Jeson
* @blog:http://www.gbsou.com
* @date:Oct 20, 2009 8:39:27 AM
* @version :1.0
*
*/
public class MultiViewResover implements ViewResolver {

   private Map<String, ViewResolver> resolvers;

   @Override
   public View resolveViewName(String viewName, Locale locale)
           throws Exception {
       int n = viewName.lastIndexOf("_"); // 获取
                                           // viewName(modelAndView中的名字)看其有没有下划线
       if (n == (-1))
           return null; // 没有则直接返回空
       // 有的话截取下划线后面的字符串这里一般是jsp,ftl,vm与配置文件中的<entry key="ftl">的key匹配
       String suffix = viewName.substring(n + 1);
       // 根据下划线后面的字符串去获取托管的视图解析类对象
       ViewResolver resolver = resolvers.get(suffix);

       // 取下划线前面的部分那时真正的资源名.比如我们要使用hello.jsp 那viewName就应该是hello_jsp
       viewName = viewName.substring(0, n);
       if (resolver != null)
           return resolver.resolveViewName(viewName, locale);
       return null;
   }

   public Map<String, ViewResolver> getResolvers() {
       return resolvers;
   }

   public void setResolvers(Map<String, ViewResolver> resolvers) {
       this.resolvers = resolvers;
   }
}

action

package com.spring.action;

import java.util.HashMap;
import java.util.Map;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class HelloWorldAction {

   @RequestMapping(value = "/helloworld.do")
   public ModelAndView hello() {
       ModelAndView modelAndView = new ModelAndView();
       modelAndView.setViewName("hello_jsp");
       modelAndView.addObject("message", "Hello,SpringMvc");
       return modelAndView;
   }

   @RequestMapping(value = "/welcome.do")
   public ModelAndView helloVm() {
       // ModelAndView modelAndView=new ModelAndView();
       // modelAndView.setViewName("freemarker_ftl");
       // modelAndView.addObject("message", "Hello,Velocity");
       // return modelAndView;
       Map map = new HashMap();
       return new ModelAndView("freemarker_ftl", map); // 根据之前的解释这里就是去寻找
                                                           // user.ftl资源

   }

   @RequestMapping(value = "/free.do")
   public ModelAndView helloFreeMarker() {
       ModelAndView modelAndView = new ModelAndView();
       modelAndView.setViewName("welcome");
       modelAndView.addObject("message", "Hello,Freemarker");
       return modelAndView;
   }

}
这样在页面键入对应action就可以访问对应的视图实现了