这是我的情况：
我为我的Web服务设置了mvc-config.xml文件,以将JSON作为默认媒体类型.我也为ContentNegotiatingViewResolver提供了avourpParameter.此外,我将useNotAcceptableStatusCode设置为true,以便不接受的格式将返回406.
我的问题是：在配置中,当有人传入不可接受的格式参数(format = foo)时,是否有办法触发406状态代码？还是必须用代码完成？
这是配置文件：
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<bean
class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="mediaTypes">
<map>
<entry key="json" value="application/json" />
<entry key="xml" value="application/xml" />
</map>
</property>
<property name="defaultViews">
<list>
<bean class="com.work.stuff.web.view.json.ExtendedMappingJacksonJsonView">
<property name="objectMapper">
<ref bean="JacksonObjectMapper" />
</property>
</bean>
<bean class="org.springframework.web.servlet.view.xml.MarshallingView">
<property name="marshaller">
<ref bean="Jaxb2Marshaller" />
</property>
</bean>
</list>
</property>
<property name="defaultContentType" value="application/json" />
<property name="favorParameter" value="true" />
<property name="useNotAcceptableStatusCode" value="true" />
</bean>
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<bean
class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="objectMapper">
<ref bean="JacksonObjectMapper" />
</property>
</bean>
<ref bean="marshallingHttpMessageConverter" />
</list>
</property>
</bean>
<bean id="marshallingHttpMessageConverter"
class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
<property name="marshaller" ref="Jaxb2Marshaller" />
<property name="unmarshaller" ref="Jaxb2Marshaller" />
</bean>
<bean id="JacksonObjectMapper" class="org.codehaus.jackson.map.ObjectMapper" />
<bean id="JacksonSerializationConfig" class="org.codehaus.jackson.map.SerializationConfig"
factory-bean="JacksonObjectMapper" factory-method="getSerializationConfig" />
<bean
class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject" ref="JacksonSerializationConfig" />
<property name="targetMethod" value="setSerializationInclusion" />
<property name="arguments">
<list>
<value type="org.codehaus.jackson.map.annotate.JsonSerialize.Inclusion">NON_NULL</value>
</list>
</property>
</bean>
<bean id="Jaxb2Marshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
<property name="classesToBeBound">
<list>
<value>com.work.stuff.Concepts</value>
<value>com.work.stuff.Concept</value>
<value>com.work.stuff.Terms</value>
<value>com.work.stuff.Term</value>
<value>com.work.stuff.Namespaces</value>
<value>com.work.stuff.Namespace</value>
<value>com.work.stuff.Subsets</value>
<value>com.work.stuff.Subset</value>
<value>com.work.stuff.Associations</value>
<value>com.work.stuff.Association</value>
</list>
</property>
</bean>
</beans>
ContentNegotiatingViewResolver似乎不支持这种行为.就目前而言,我认为最好的选择是将其子类化并重写getMediaTypeFromParameter()方法,以在不支持媒体类型的情况下引发异常.
您可以从该方法引发任何RuntimeException,如果您使用@ResponseStatus注释异常类,则可以控制HTTP响应代码,例如
@ResponseStatus(HttpStatus.NOT_ACCEPTABLE)
public class FormatNotSupportedException extends RuntimeException {
}
从长远来看,我强烈建议您提出http://jira.springsource.org的问题,要求将此类功能添加到ContentNegotiatingViewResolver.他们应该能够将此添加为可选的行为参数.像这样的请求意味着Spring不断变得更好.
