SpringMVC的环境搭建

搭建方式：一、配置形式

1、web.xml的配置

<?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">
  <display-name>SpringMVCDemo02</display-name>	
  <servlet>
  	<servlet-name>spring</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath*:applicationContext_mvc.xml</param-value>
  	</init-param>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>spring</servlet-name>
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

load-on-startup元素标记容器是否在启动的时候就加载这个servlet
1)它的值必须是一个整数，表示servlet应该被载入的顺序
2)当值为0或者大于0时，表示容器在应用启动时就加载并初始化这个servlet；
3)当值小于0或者没有指定时，则表示容器在该servlet被选择时才会去加载。
4)正数的值越小，该servlet的优先级越高，应用启动时就越先加载。
5)当值相同时，容器就会自己选择顺序来加载。

DispatcherServlet：解析请求映射的找到application-mvc.xml

SimpleUrlHandelMapping:建立请求和action或者controller之间的映射

2、

<?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/beans 
	   http://www.springframework.org/schema/beans/spring-beans-4.2.xsd 
	   http://www.springframework.org/schema/context 
	   http://www.springframework.org/schema/context/spring-context-4.2.xsd 
	   http://www.springframework.org/schema/mvc 
	   http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">
	  
	   <!-- 由IOC管理表现层实现类 -->

	   <bean id="testAction" class="com.javalxj.spring.mvc.action.TestAction"></bean>

	   <!-- 定义返回页面相关参数 -->
	   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	   		<property name="prefix" value="/"></property><!-- 前缀 -->
	   		<property name="suffix" value=".jsp"></property><!-- 后缀 -->
	   </bean>
	  
	   <!-- 建立URL映射 -->
	    <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
	   		<property name="mappings">
	   			<props>
	   				<prop key="/test.do">testAction</prop>
	   			</props>
	   		</property>
	   
	   </bean>

package com.javalxj.spring.mvc.action;


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 TestAction implements Controller{
/**
 * 默认方法
 */
	public ModelAndView handleRequest(HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		// TODO Auto-generated method stub
		System.out.println("testAction"+request.getParameter("userName"));
		return new ModelAndView("index");
	}


	


}

二、注解形式

<!-- 启动注解驱动的Spring MVC功能，注册请求url和注解POJO类方法的映射 建立请求与类的映射-->
	  <mvc:annotation-driven></mvc:annotation-driven>
	   <!-- 扫描模块找到有标记的类：把标记了@Controller注解的类转换为bean -->
	   <context:component-scan base-package="com.javalxj.spring"></context:component-scan>
	   <!-- 定义返回页面相关参数 -->
	   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	   		<property name="prefix" value="/"></property><!-- 前缀 -->
	   		<property name="suffix" value=".jsp"></property><!-- 后缀 -->
	   </bean>

@Controller

public class TestController {
		//用于处理响应
	@RequestMapping("/login.do")
	public String login(String userName,String userPwd,Map map){
		if("admin".equals(userName)&&"123".equals(userPwd)){
			map.put("userName",userName);
			System.out.println("testController delete mathod:"+userName+":"+userPwd);
			return "success";
		}
		System.out.println("testController delete mathod:"+userName+":"+userPwd);
		return "login";