spring中xml解析

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一般的xml文件都以一下内容开头,下面对其内容做解析
<beans xmlns="http://www.springframework.org/schema/beans"                        //命名空间地址(namespace)
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"                       //用于指明此工程中所用到的
xmlns:aop="http://www.springframework.org/schema/aop"                       //具体命名空间
xmlns:p="http://www.springframework.org/schema/p"
                          //

//beans、context、mvc、aop在schema中的具体位置要在schemaLocation中指明xsi:schemaLocation="http://www.springframework.org/schema/beans    http://www.springframework.org/schema/beans/spring-beans-3.1.xsd    http://www.springframework.org/schema/context                   http://www.springframework.org/schema/context/spring-context-3.1.xsd    http://www.springframework.org/schema/mvc    http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd    http://www.springframework.org/schema/aop    http://www.springframework.org/schema/aop/spring-aop-3.1.xsd ">`

<mvc:annotation-driven />
//告知Spring,我们启用注解驱动。然后Spring会自动为我们注册上面说到的几个Bean到工厂中,来处理我们的请求(主要包括RequestMappingHandlerMapping和RequestMappingHandlerAdapter等8个bean)

<context:component-scan base-package="bp.decoration.cost.controller"/>
//告诉Spring 来扫描指定包下的类,并注册被@Component,@Controller,@Service,@Repository等注解标记的组件

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