springMVC中的视图解析器viewResolver——BeanNameViewResolver

注：常用的视图解析器有3种，分别为InteralResourceViewResolver、BeanNameViewResolver、xmlViewResolver、ResourceBundleViewResolver，默认的是InteralResourceViewResolver，用来解析工程内部资源。

1、web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>01-springMVCPrimary</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <!-- 注册中央调度器 -->
  <servlet>
  	<servlet-name>springMVC</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<!-- 指定springMVC的配置文件的位置和路径 -->
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath:springMVC.xml</param-value>
  	</init-param>
  	<!-- 表示启动服务器就创建该对象，不设置的话，那么就在请求到达时，创建该对象 -->
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>springMVC</servlet-name>
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>
  
  
</web-app>

2、springMVC.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:context="http://www.springframework.org/schema/context" 
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop.xsd">
        
        <!-- 注册视图内部资源 -->
        <bean id="welcome" class="org.springframework.web.servlet.view.JstlView">
        	<property name="url" value="/WEB-INF/jsp/welcome.jsp"/>
        </bean>
        <!-- 注册外部视图资源 -->
        <bean id="taobao" class="org.springframework.web.servlet.view.RedirectView">
        	<property name="url" value="http://www.taobao.com"/>
        </bean>
        <!-- 注册外部视图资源 -->
        <bean id="jd" class="org.springframework.web.servlet.view.RedirectView">
        	<property name="url" value="http://www.jd.com"/>
        </bean>
        
        <!-- 注册视图解析器 -->
        <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
        
        
        <!-- 注册控制器 -->
        <bean id="/my.do" class="com.handlers.MyController"/>

</beans>

3、MyController

package com.handlers;

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

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

public class MyController implements Controller {

	@Override
	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
		
		ModelAndView mv = new ModelAndView("welcome");
		return mv;
	}

	

}