春季无法使用 XML 响应

Question

我们目前有一个响应 json 的 Spring App。我们也在尝试支持 xml 响应。目前，控制器方法看起来像

@RequestMapping(value = URIConstants.POSTS, method = RequestMethod.POST, produces = { MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE })
public @ResponseBody RestResponse<PostResponse> getItems(@RequestBody Request request, HttpServletRequest httpRequest) throws Exception {

  // do stuff
}

我们在服务器配置 xml 中添加了以下内容：

<bean id="contentNegotiationManager"
         class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
    <property name="favorPathExtension" value="true"/>
    <property name="ignoreAcceptHeader" value="true" />
    <property name="useJaf" value="false"/>
    <property name="defaultContentType" value="application/json" />
    <property name="mediaTypes">
        <map>
            <entry key="json" value="application/json" />
            <entry key="xml" value="application/xml" />
        </map>
    </property>
</bean>

这是完整的配置文件：

<bean id="contentNegotiationManager"
         class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
    <property name="favorPathExtension" value="true"/>
    <property name="ignoreAcceptHeader" value="true" />
    <property name="useJaf" value="false"/>
    <property name="defaultContentType" value="application/json" />
    <property name="mediaTypes">
        <map>
            <entry key="json" value="application/json" />
            <entry key="xml" value="application/xml" />
        </map>
    </property>
</bean>

<bean id="spurJSONMapper"  class="com.ct.app.utilities.SpurJSONMapper"/>

<mvc:interceptors>
    <ref bean="interceptor"/>
</mvc:interceptors>

<bean id="interceptor" 
            class="com.ct.app.controller.RequestInterceptor">
</bean>


  <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  <property name="prefix" value="/WEB-INF/view/"/>
  <property name="suffix" value=".jsp"/>
 </bean>

   <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMapping HandlerAdapter">
   <property name="messageConverters">
      <list>
          <ref bean="jsonMessageConverter"/>

      </list>
   </property>
</bean>


<bean id="jsonMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
 </bean>

当我们请求资源时，我们得到以下响应：“服务器拒绝此请求，因为请求实体的格式不受所请求方法的请求资源支持。”

不确定配置中的漏洞在哪里，感谢任何帮助。

Answer 1

如果您打算读写 XML，则需要使用 org.springframework.oxm 包中的特定 Marshaller 和 Unmarshaller 实现配置 MarshallingHttpMessageConverter。

更新您的 XML 以在下面考虑

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
    <property name="messageConverters">
        <util:list id="beanList">
            <ref bean="stringHttpMessageConverter"/>
            <ref bean="marshallingHttpMessageConverter"/>
        </util:list>
    </property
</bean>

<bean id="stringHttpMessageConverter"
        class="org.springframework.http.converter.StringHttpMessageConverter"/>

<bean id="marshallingHttpMessageConverter"
        class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
    <property name="marshaller" ref="castorMarshaller" />
    <property name="unmarshaller" ref="castorMarshaller" />
</bean>

<bean id="castorMarshaller" class="org.springframework.oxm.castor.CastorMarshaller"/>

所以，你更新后的配置应该是这样的（我很快更新了，所以请仔细检查一次）

<bean id="contentNegotiationManager"
         class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
    <property name="favorPathExtension" value="true"/>
    <property name="ignoreAcceptHeader" value="true" />
    <property name="useJaf" value="false"/>
    <property name="defaultContentType" value="application/json" />
    <property name="mediaTypes">
        <map>
            <entry key="json" value="application/json" />
            <entry key="xml" value="application/xml" />
        </map>
    </property>
</bean>

<bean id="spurJSONMapper"  class="com.ct.app.utilities.SpurJSONMapper"/>

<mvc:interceptors>
    <ref bean="interceptor"/>
</mvc:interceptors>

<bean id="interceptor" 
            class="com.ct.app.controller.RequestInterceptor">
</bean>


  <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  <property name="prefix" value="/WEB-INF/view/"/>
  <property name="suffix" value=".jsp"/>
 </bean>

   <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
   <property name="messageConverters">
      <list>
          <ref bean="jsonMessageConverter"/>
          <ref bean="marshallingHttpMessageConverter"/>
          <ref bean="stringHttpMessageConverter"/>
      </list>
   </property>
</bean>

<bean id="stringHttpMessageConverter"
        class="org.springframework.http.converter.StringHttpMessageConverter"/>

<bean id="marshallingHttpMessageConverter"
        class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
    <property name="marshaller" ref="castorMarshaller" />
    <property name="unmarshaller" ref="castorMarshaller" />
</bean>

<bean id="castorMarshaller" class="org.springframework.oxm.castor.CastorMarshaller"/>

<bean id="jsonMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
 </bean>

阅读更多here

附带说明，对于CastorMarshaller，您必须拥有spring-oxm-x.x.x.RELEASE.jar JAR，我想您应该已经拥有了。