Spring多视图并存比较好的解决方案

网上搜了下资料，自己也实战了下。分享一下。
传统的web.xml写法不变，如下为相关配置信息：

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

之所以将url-pattern配置成*.html，一是隐藏技术实现，二是增加搜索引擎的搜索概率。看个人爱好。
关键是对应的myportal-servlet.xml文件中的配置.

<bean id="viewResolver" class="com.myportal.web.core.MultipleViewResolver">
    <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/</value>  
			        </property>  
                </bean>
            </entry>
            
            <entry key="vm">
                <bean class="org.springframework.web.servlet.view.velocity.VelocityViewResolver">
                    <property name="contentType" value="text/html;charset=UTF-8" />
                </bean>
            </entry>
        </map>
    </property>
</bean>

然后大家在自己的Controller类里面必须返回如下视图:new ModelAndView("test.jsp");或者new ModelAndView("test.vm");
最后是自己写的ViewResolver，如下：

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

public View resolveViewName(String viewName, Locale locale)        throws Exception {
		 int n = viewName.lastIndexOf(".");

	        if(n==(-1)) return null;

	        // 获得扩展名:

	        String suffix = viewName.substring(n+1);

	        // 取出对应的ViewResolver:

	        ViewResolver resolver = resolvers.get(suffix);

	        if(resolver!=null)

	            return resolver.resolveViewName(viewName, locale);

	        // 没有找到对应的ViewResolver就抛异常:

	        return null;

	}

}

当然，大家可以对自己写的ViewResovler进行功能上的丰富，比如：设定默认的视图解析为jsp，那你的Controller的View就可以偷懒写成new ModelAndView("test")了。基本功能有了，完善慢慢来。