spring-mvc 之 hello spring-mvc

springmvc所需要的jar包：

commons-logging.jar
org.springframework.asm-3.0.5.RELEASE.jar
org.springframework.beans-3.0.5.RELEASE.jar
org.springframework.context-3.0.5.RELEASE.jar
org.springframework.core-3.0.5.RELEASE.jar
org.springframework.expression-3.0.5.RELEASE.jar
org.springframework.web-3.0.5.RELEASE.jar
org.springframework.web.servlet-3.0.5.RELEASE.jar

web.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
    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_3_0.xsd">
	<!-- 配置springmvc -->
	<servlet>
		<servlet-name>DispatcherServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- 配置DispatcherServlet的初始化参数：配置springMVC的配置文件位置名称
      		     如果不配置，默认加载WEB-INF下的DispatcherServlet-servlet.xml文件 -->
		<init-param>
			<param-name>contextConfigLocation</param-name>
                        <!-- 为src目录下的springmvc.xml文件 -->
			<param-value>classpath:springmvc.xml</param-value>
		</init-param>
	</servlet>
	<servlet-mapping>
		<servlet-name>DispatcherServlet</servlet-name>
		<!-- 拦截所有.action的请求【也可以为.do】 -->
		<url-pattern>*.action</url-pattern>
	</servlet-mapping>
	
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>

springmvc.xml配置

<?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:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
		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">
    <!-- 配置自定扫描的包 -->
    <context:component-scan base-package="com.wcg.springmvc"></context:component-scan>
    <!-- 配置视图解析器：如何把handler方法返回的值解析为实际的物理视图 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceView">
    	<property name="prefix" value="/WEB-INF/views/"></property>
    	<property name="suffix" value=".jsp"></property>
    </bean>	
</beans>

HelloWorld.java

@Controller
public class HelloWorld {
	/**
	 * 1.使用@RequestMapping注解来映射请求的url
	 * 2.返回值会通过视图解析器解析为实际的物理视图，对于InternalResourceViewResolver视图解析器，会做如下的解析
	 * 通过prefix+returnValue+suffix这样的方式对到实际的物理视图，然后执行转发操作【/WEB-INF/views/success.jsp】
	 * @return
	 */
	@RequestMapping("/helloworld.action")
	public String helloWorld(){
		System.out.println("Hello World");
		return "success";
	}
	
}

spring-mvc 之 hello spring-mvc

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