spring支持text/html json

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
        <property name="contentNegotiationManager" ref="cnManager"/>  
        
        <property name="viewResolvers">
        <list>
        <!-- Default viewClass: JSTL view (JSP with html output) 
   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
 
       <property name="prefix" value="/WEB-INF/jsp/"/>
       <property name="suffix" value=".jsp"/>
   </bean>
   -->
<bean class="org.springframework.web.servlet.view.UrlBasedViewResolver" id="tilesViewResolver">
   <property name="viewClass" value="org.springframework.web.servlet.view.tiles2.TilesView"/>
</bean>
   <!-- Used here for 'xml' and 'atom' views  -->
   <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
        </list>
        </property>
        <property name="defaultViews">
   <list>
     <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView" />
   </list>
</property>
    </bean>


    <bean class="org.springframework.web.servlet.view.tiles2.TilesConfigurer" id="tilesConfigurer">
    <property name="definitions">
      <list>
        <value>/WEB-INF/layouts/layouts.xml</value>
        <!-- Scan views directory for Tiles configurations -->
        <value>/WEB-INF/views/**/views.xml</value>
      </list>
    </property>
  </bean>

<bean id="cnManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">

        <property name="favorPathExtension" value="true"/>
        <property name="ignoreAcceptHeader" 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>

加上jar包 ：

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.1.0</version>
</dependency>

当类中含有类的时候，json会出错：

org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.domain.User.articles, could not initialize proxy - no Session

需要将User中的Article忽略json：

@JsonIgnore

private Article article;

@Controller

@RequestMapping(value="trash/{id}")
public String trash(HttpServletRequest request, HttpServletResponse resposne, ModelMap modelMap,@PathVariable("id") Integer id, Article article){
articleService.trashArticleById(id);
return null;
}

json返回null视图