Spring的配置文件和SpringMvc的配置文件的区别
1、Spring的配置文件和SpringMVC配置文件的加载位置
都是在web.xml中指定的,一个是为了初始化跟容器,一个是为了初始化子容器
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <!-- 根容器 --> <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> <!-- web 容器 子容器--> <servlet> <!-- 声明Dispatcher,告诉Web容器我们将使用springMVC的DispatcherServlet --> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- DispatcherServlet在加载时会需要SpringMVC的配置文件,因此需要声明该配置文件的位置。 --> <!-- 如果不配置该项,则应用会默认的去WEB-INF下寻找名字为[servlet-name]-servlet.xml的文件。 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <!-- 配置url-pattern,设置为 / 拦截所有的URL请求,并映射到dispatcher --> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/h1</url-pattern> </servlet-mapping> </web-app>
2、SpringMVC的配置文件作用
springMVC的配置文件主要和SpringMVC有关的配置,controller,servlet,viewResolver 等
<?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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!-- 扫描包交给spirng的ioc来管理,让指定目录下的注解生效 --> <context:component-scan base-package="com.kuang.controller"/> <!-- 使用默认的 servlet handler, 过滤掉 .css .mp4 .js等的文件--> <mvc:default-servlet-handler/> <mvc:annotation-driven/> <!-- 视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
3、spring 的配置文件的作用
主要是实例化和初始化 service、dao 以及事务和别的东西集成的配置
<?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:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="com.kuang" > <!-- 排除实现了Controller接口的类 Mycontroller --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> </beans>