Spring MVC学习笔记 01

applicationcontext.xml的配置

<?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:p="http://www.springframework.org/schema/p"
    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-3.0.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context-3.0.xsd
       http://www.springframework.org/schema/tx 
       http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
    
    <!-- 扫描类包，将标注Spring注解的类自动转化Bean，同时完成Bean的注入 持久层和业务层-->
    <context:component-scan base-package=".dao"/>
    <context:component-scan base-package=".service"/>
    
    <!-- 配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close" 
        p:driverClassName="com.mysql.jdbc.Driver"
        p:url="jdbc:mysql://localhost:3306/sampledb" 
        p:username="root"
        p:password="1234" />

    <!-- 配置Jdbc模板  -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"
        p:dataSource-ref="dataSource" />
</beans>

web.xml的配置

<!--ContextLoaderListener是一个ServletContextListener ,它通过contextConfigLocation参数所指定的Spring配置文件启动“业务层”的Spring容器-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>
            org.springframework.web.context.ContextLoaderListener
        </listener-class>
    </listener>
<!-- 所有带*.html后缀的HTTP请求都会被DispatcherServlet截获并处理->
    <servlet>
        <servlet-name>a</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <load-on-startup>3</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>a</servlet-name>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>

注意：一个web.xml可以配置多个DispatcherServlet，通过其<servlet-mapping>的配置，让每个DispatcherServlet处理不同的请求。

a-servlet.xml的配置

<!-- 让包下标注了Spring注解的类生效  展现层（控制类）-->
    <context:component-scan base-package=""/>
    
<!-- 配置视图解析器，将ModelAndView及字符串解析为具体的页面 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver"
        p:viewClass="org.springframework.web.servlet.view.JstlView" 
        p:prefix="/WEB-INF/jsp/"
        p:suffix=".jsp" />