为了简化springmvc配置,spring同时引入了mvc namespace, 配置了
<mvc:annotation-driven/>
spring会默认注册a RequestMappingHandlerMapping, a RequestMappingHandlerAdapter, and an ExceptionHandlerExceptionResolver 三个bean, 来支持使用注解(@RequestMapping、@ExceptionHandler、@Controller等)修饰的controller处理请求。同时还有以下一些特性:
1、 Spring 3 style type conversion through a ConversionService instance in addition to the JavaBeans PropertyEditors used for Data Binding.
2、 Support for formatting Number fields using the @NumberFormat annotation through the ConversionService.
3、 Support for formatting Date, Calendar, Long, and Joda-Time fields using the @DateTimeFormat annotation.
4、 Support for validating @Controller inputs with @Valid, if a JSR-303 Provider is present on the classpath.
5、 HttpMessageConverter support for @RequestBody method parameters and @ResponseBody method return values from @RequestMapping or @ExceptionHandler methods.This is the complete list of HttpMessageConverters set up by mvc:annotation-driven:
a. ByteArrayHttpMessageConverter converts byte arrays.
b. StringHttpMessageConverter converts strings.
c. ResourceHttpMessageConverter converts to/from org.springframework.core.io.Resource for all media types.
d. SourceHttpMessageConverter converts to/from a javax.xml.transform.Source.
e. FormHttpMessageConverter converts form data to/from a MultiValueMap<String, String>.
f. Jaxb2RootElementHttpMessageConverter converts Java objects to/from XML — added if JAXB2 is present and Jackson 2 XML extension is not present on the classpath.
g. MappingJackson2HttpMessageConverter converts to/from JSON — added if Jackson 2 is present on the classpath.
h. MappingJackson2XmlHttpMessageConverter converts to/from XML — added if Jackson 2 XML extension is present on the classpath.
i. AtomFeedHttpMessageConverter converts Atom feeds — added if Rome is present on the classpath.
j. RssChannelHttpMessageConverter converts RSS feeds — added if Rome is present on the classpath.
配置示例:
<bean name="fastJson" class="com.alibaba.fastjson.support.config.FastJsonConfig">
<property name="features">
<list>
<value>AllowSingleQuotes</value>
</list>
</property>
<property name="serializerFeatures">
<list>
<value>QuoteFieldNames</value>
<value>WriteEnumUsingToString</value>
<value>WriteEnumUsingName</value>
<value>WriteNullNumberAsZero</value>
<value>SkipTransientField</value>
<value>WriteDateUseDateFormat</value>
</list>
</property>
</bean>
<!--默认的mvc注解映射的支持 -->
<mvc:annotation-driven>
<mvc:message-converters>
<bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
<value>text/html;charset=UTF-8</value>
<value>text/json;charset=UTF-8</value>
</list>
</property>
<property name="fastJsonConfig" ref="fastJson"/>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
引用:
1、 springdoc
2、what‘s annotation-driven do
原文地址:https://www.cnblogs.com/graph/p/8998697.html