学步园

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"/>
    <!--
    org.springframework.web.servlet.view.ResourceBundleViewResolver
    用于多个视图集成时,ResourceBundleViewResolver是通过解析资源文件来解析请求输出文件的。
    <property name="basename" value="views"></property>,即表示在/WEB-INF/classes路径下有一个
    views.properties文件,本例中views.properties的内容为
    welcome.(class)=org.springframework.web.servlet.view.velocity.VelocityView
    welcome.url=welcome.vm
    freemarker.(class)=org.springframework.web.servlet.view.freemarker.FreeMarkerView
    freemarker.url=freemarker.ftl
    -->
    <bean class="org.springframework.web.servlet.view.ResourceBundleViewResolver">
        <property name="basename" value="views">
        </property>
        <!--
        <property name="order" value="0"></property>
        -->
    </bean>
    <!-- FreeMarker环境配置 -->
    <bean id="freemarkerConfig"
    
     class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
        <!-- freemarker模板位置 -->
        <property name="templateLoaderPath" value="/WEB-INF/freemarker/"/>
    </bean>
	<!-- velocity环境配置 -->
	<bean id="velocityConfig" 

	 class="org.springframework.web.servlet.view.velocity.VelocityConfigurer">
		<!-- velocity配置文件路径 -->
		<property name="configLocation" value="/WEB-INF/velocity.properties"/>
		<!-- velocity模板路径 -->
		<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>

2 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;
	}
}

3. 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