ContentNegotiatingViewResolver MediaTypes Fehler nach 4.2

Question

zum Frühling Upgrade habe ich eine Dispatcher-servlet.xml Datei, die ein Bean wie diese hat:

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver" p:defaultContentType="text/html"> 
    <property name="mediaTypes"> 
     <map> 
      <entry key="html" value="text/html"/> 
      <entry key="json" value="application/json"/> 
     </map> 
    </property> 
    <property name="viewResolvers"> 
     <list> 
      <bean id="localBasedViewResolver" class="com.company.web.i18n.LocaleBasedViewResolver" 
        p:viewClass="org.springframework.web.servlet.view.JstlView" 
        p:prefix="${views.prefix}" 
        p:suffix="${views.suffix}" 
        p:cacheUnresolved="false" 
        p:exposedContextBeanNames="webProperties" 
        p:order="1" 
        /> 
      <bean id="viewResolver" 
        class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
        p:viewClass="org.springframework.web.servlet.view.JstlView" 
        p:prefix="${views.prefix}" 
        p:suffix="${views.suffix}" 
        p:cacheUnresolved="false" 
        p:exposedContextBeanNames="webProperties" 
        p:order="2" 
        /> 
     </list> 
    </property> 
    <property name="defaultViews"> 
     <list> 
      <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView"/> 
     </list> 
    </property> 
</bean> 

Nach dem Upgrade 4.2 ich folgende Fehlermeldung erhalten, zum Frühling:

Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'mediaTypes' of bean class [org.springframework.web.servlet.view.ContentNegotiatingViewResolver]: Bean property 'mediaTypes' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter? 
    at org.springframework.beans.BeanWrapperImpl.createNotWritablePropertyException(BeanWrapperImpl.java:230) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] 
    at org.springframework.beans.AbstractNestablePropertyAccessor.setPropertyValue(AbstractNestablePropertyAccessor.java:423) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] 
    at org.springframework.beans.AbstractNestablePropertyAccessor.setPropertyValue(AbstractNestablePropertyAccessor.java:280) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] 

Dies funktionierte vor dem Upgrade, so dass jede Hilfe bei der Reparatur sehr geschätzt werden würde!

Answer 1

Spring 4.2 ContentNegoatingViewResolver delegiert die Inhaltsverhandlung nun an einen ContentNegotiationManager. Definieren Sie eine ContentNegotiationManager Bohne in Ihrem Anwendungskontext und setzen Sie ihn auf Ihrer Ansicht Resolver wie folgt

<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="text/html" /> 

     <property name="mediaTypes"> 
      <map> 
       <entry key="html" value="text/html"/> 
       <entry key="json" value="application/json"/> 
      </map> 
     </property> 
    </bean> 

Dann ist Ihre Ansicht Resolver wie folgt aktualisieren

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> 
    <property name="contentNegotiationManager" ref="contentNegotiationManager"/> 
    <property name="viewResolvers"> 
     <list> 
      <bean id="localBasedViewResolver" class="com.company.web.i18n.LocaleBasedViewResolver" 
        p:viewClass="org.springframework.web.servlet.view.JstlView" 
        p:prefix="${views.prefix}" 
        p:suffix="${views.suffix}" 
        p:cacheUnresolved="false" 
        p:exposedContextBeanNames="webProperties" 
        p:order="1" 
        /> 
      <bean id="viewResolver" 
        class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
        p:viewClass="org.springframework.web.servlet.view.JstlView" 
        p:prefix="${views.prefix}" 
        p:suffix="${views.suffix}" 
        p:cacheUnresolved="false" 
        p:exposedContextBeanNames="webProperties" 
        p:order="2" 
        /> 
     </list> 
    </property> 
    <property name="defaultViews"> 
     <list> 
      <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView"/> 
     </list> 
    </property> 
</bean>