Spring mvc 注解方式

Spring mvc 注解方式实现

第一步： web.xml中 启动spring mvc 模块

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
	
    <servlet>
        <servlet-name>main</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>main</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
    
    
</web-app>

第二步： 编写普通的pojo类

package com.chapter2;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
 * @author 
 * 基于注解的 Controller
 */
@Controller
@RequestMapping("/ok.do")
public class MyController {

	@RequestMapping
	public String listTurn()
	{
		return "123";
	}
}

注意：@Controller和@RequestMapping
第三步 配置main-servlet.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-2.5.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-2.5.xsd">
	
	<!-- 1,扫描web包中的所有类以完成Bean创建和自动依赖注入的功能 -->
	<context:component-scan base-package="com.chapter2"/>
	<!--2,启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->
	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
	 <!-- 3,对模型视图名称的解析，即在模型视图名称添加前后缀 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"   p:prefix="/WEB-INF/" p:suffix=".jsp"/>
	
</beans>

spring 跳转到/WEB-INF/目录下的页面,
不要把页面建在/webRoot下了