SpringMVC_01

1 什么是SpringMVC

　　是一个mvc框架，用来简化基于mvc架构的web应用程序的 开发。

2 SpringMVC五大组件

　　DispatcherServlet (前端控制器)

　　HanlderMapping

　　Controller (处理器)

　　ModelAndView

　　ViewResolver (视图解析器)

　　2.1 springMVC 的五大组件怎么协同工作

　　　　》DispatcherServlet收到请求之后,依据 HandlerMapping的配置调用相应的处理器来处理。

　　　　》处理器将处理结果封装成ModelAndView， 然后返回给DispatcherServlet。

　　　　》DispatcherServlet依据ViewResovler的 解析，调用相应的视图对象（比如某个jsp）来生成 相应的页面。

3 SpringMVC编程步骤

　　3.1 导包 ： spring-webmvc

　　　　》需要配置运行环境为 Tomcat

　　3.2 添加一个spring的配置文件

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
 4     xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"
 5     xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"
 6     xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util"
 7     xmlns:jpa="http://www.springframework.org/schema/data/jpa"
 8     xsi:schemaLocation="
 9         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
10         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
11         http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
12         http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
13         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
14         http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
15         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
16         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
17         http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
18
19     <!-- 配置HandlerMapping -->
20     <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
21         <property name="mappings">
22             <props>
23                 <prop key="/hello.do">helloController</prop>
24             </props>
25         </property>
26     </bean>
27     <bean id="helloController" class="test.TestController"/>
28
29     <!-- 配置ViewResolver -->
30     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
31     <property name="prefix" value="/WEB-INF/"/>
32     <property name="suffix" value=".jsp"/>
33     </bean>
34
35 </beans>

spring配置文件模板

　　3.3 配置DispatcherServlet

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
 3   <display-name>springmvc01s</display-name>
 4   <welcome-file-list>
 5     <welcome-file>index.html</welcome-file>
 6     <welcome-file>index.htm</welcome-file>
 7     <welcome-file>index.jsp</welcome-file>
 8     <welcome-file>default.html</welcome-file>
 9     <welcome-file>default.htm</welcome-file>
10     <welcome-file>default.jsp</welcome-file>
11   </welcome-file-list>
12
13   <servlet>
14       <servlet-name>springmvc</servlet-name>
15       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
16       <!--
17           DispatcherServlet的初始化方法会启动spring容器，
18           contextConfigLocation用于指定spring配置文件的位置
19        -->
20       <init-param>
21           <param-name>contextConfigLocation</param-name>
22           <param-value>classpath:spring-mvc.xml</param-value>
23       </init-param>
24       <load-on-startup>1</load-on-startup>
25   </servlet>
26   <servlet-mapping>
27       <servlet-name>springmvc</servlet-name>
28       <url-pattern>*.do</url-pattern>
29   </servlet-mapping>
30 </web-app>

DispatcherServlet配置文件

　　3.4 写Controller（处理器）

　　3.5 写jsp

　　3.6 配置HandlerMapping,ViewResolver

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