spring MVC <mvc:annotation-driven>

研究SpringMvc 3.2的<mvc:annotation-driven>默认干了什么

如果不配置其他参数，大致相当于以下的配置文件（参考自org.springframework.web.servlet.config.AnnotationDrivenBeanDefinitionParser） 

<!-- 配置路径扩展名映射的媒体类型 -->
    <bean name="pathExtensionContentNegotiationStrategy"
        class="org.springframework.web.accept.PathExtensionContentNegotiationStrategy">
        <constructor-arg>
            <props>
                <!-- if romePresent -->
                <prop key="atom">application/atom+xml</prop>
                <prop key="rss">application/rss+xml</prop>
                <!-- endif -->
                <!-- if jackson2Present || jacksonPresent -->
                <prop key="json">application/json</prop>
                <!-- endif -->
                <!-- if jaxb2Present -->
                <prop key="xml">application/xml</prop>
                <!-- endif -->
            </props>
        </constructor-arg>
    </bean>  

    <!-- 配置映射媒体类型的策略 -->
    <bean name="mvcContentNegotiationManager"
        class="org.springframework.web.accept.ContentNegotiationManager">
        <constructor-arg>
            <list>
                <ref bean="pathExtensionContentNegotiationStrategy" />
            </list>
        </constructor-arg>
    </bean>  

    <!-- 配置方法级别的@RequestMapping处理器 -->
    <bean name="requestMappingHandlerMapping"
        class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping">
        <property name="order" value="0" />
        <property name="contentNegotiationManager" ref="mvcContentNegotiationManager" />
    </bean>  

    <!-- 配置数据转换服务，默认使用格式化数据转换服务，可以对日期和数字进行格式化 -->
    <bean name="conversionService"
        class="org.springframework.format.support.DefaultFormattingConversionService">
        <constructor-arg index="0">
            <null></null>
        </constructor-arg>
        <constructor-arg index="1">
            <value>true</value>
        </constructor-arg>
    </bean>  

    <bean name="validator"
        class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"></bean>  

    <!-- 配置数据绑定，通过转换服务实现绑定，如果包含jsr303实现还将进行校验 -->
    <bean name="webBindingInitializer"
        class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
        <property name="conversionService" ref="conversionService" />
        <!-- if jsr303Present -->
        <property name="validator" ref="validator" />
        <!-- endif -->
    </bean>  

    <bean name="byteArrayHttpMessageConverter"
        class="org.springframework.http.converter.ByteArrayHttpMessageConverter"></bean>
    <bean name="stringHttpMessageConverter"
        class="org.springframework.http.converter.StringHttpMessageConverter">
        <property name="writeAcceptCharset" value="false" />
    </bean>
    <bean name="resourceHttpMessageConverter"
        class="org.springframework.http.converter.ResourceHttpMessageConverter"></bean>
    <bean name="sourceHttpMessageConverter"
        class="org.springframework.http.converter.xml.SourceHttpMessageConverter"></bean>
    <bean name="allEncompassingFormHttpMessageConverter"
        class="org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter"></bean>
    <bean name="atomFeedHttpMessageConverter"
        class="org.springframework.http.converter.feed.AtomFeedHttpMessageConverter"></bean>
    <bean name="rssChannelHttpMessageConverter"
        class="org.springframework.http.converter.feed.RssChannelHttpMessageConverter"></bean>
    <bean name="jaxb2RootElementHttpMessageConverter"
        class="org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter"></bean>
    <bean name="mappingJackson2HttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
    <bean name="mappingJacksonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>  

    <!-- 配置@RequestBody，@ResponseBody注解可用的转换器 -->
    <util:list id="messageConverters"
        list-class="org.springframework.beans.factory.support.ManagedList.ManagedList">
        <ref bean="byteArrayHttpMessageConverter" />
        <ref bean="stringHttpMessageConverter" />
        <ref bean="resourceHttpMessageConverter" />
        <ref bean="sourceHttpMessageConverter" />
        <ref bean="allEncompassingFormHttpMessageConverter" />
        <!-- if romePresent -->
        <ref bean="atomFeedHttpMessageConverter" />
        <ref bean="rssChannelHttpMessageConverter" />
        <!-- endif -->
        <!-- if jaxb2Present -->
        <ref bean="jaxb2RootElementHttpMessageConverter" />
        <!-- endif -->
        <!-- if jackson2Present -->
        <ref bean="mappingJackson2HttpMessageConverter" />
        <!-- endif -->
        <!-- if jacksonPresent -->
        <ref bean="mappingJacksonHttpMessageConverter" />
        <!-- endif -->
    </util:list>  

    <!-- 将任意类型的Controller适配为Handler -->
    <bean name="requestMappingHandlerAdapter"
        class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="contentNegotiationManager" ref="mvcContentNegotiationManager" />
        <property name="webBindingInitializer" ref="webBindingInitializer" />
        <property name="messageConverters" ref="messageConverters" />
    </bean>  

    <!-- 这个拦截器暴露转换器服务让spring:bind和spring:eval标签可用 -->
    <bean name="csInterceptor"
        class="org.springframework.web.servlet.handler.ConversionServiceExposingInterceptor">
        <constructor-arg index="0">
            <ref bean="conversionService" />
        </constructor-arg>
    </bean>  

    <!-- 现在所有拦截器都必须设定响应的路径映射 -->
    <bean name="mappedCsInterceptor"
        class="org.springframework.web.servlet.handler.MappedInterceptor">
        <constructor-arg index="0">
            <null></null>
        </constructor-arg>
        <constructor-arg index="1">
            <ref bean="csInterceptor" />
        </constructor-arg>
    </bean>  

    <!-- 使用@ExceptionHandler注解的方法来处理Exception，优先级为0（最高） -->
    <bean name="exceptionHandlerExceptionResolver"
        class="org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver">
        <property name="contentNegotiationManager" ref="mvcContentNegotiationManager" />
        <property name="messageConverters" ref="messageConverters" />
        <property name="order" value="0" />
    </bean>  

    <!-- 如果抛出的Exception类带有@ResponseStatus注解，响应返回该注解的Http状态码，优先级为1 -->
    <bean name="responseStatusExceptionResolver"
        class="org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver">
        <property name="order" value="1" />
    </bean>  

    <!-- SpringMvc内部异常处理 -->
    <bean name="defaultExceptionResolver"
        class="org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver">
        <property name="order" value="2" />
    </bean>