spring - 无法加载资源: the server responded with a status of 406 (Not Acceptable)

Question

基于我之前的 question ，我已经将Spring框架从3.0.2升级到3.2.0出于此question中提到的原因(Spring 3.0.2 会导致上传多个文件出现问题，因为存在一个长期存在的错误)。

在新版本中，一切正常，但 JSON 除外。在响应时，Google Chrome 显示此错误。

Failed to load resource: the server responded with a status of 406 (Not Acceptable)

我已尝试按照指定执行here在 dispatcher-servlet.xml 文件中，例如，

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
  <property name="mediaTypes">
    <map>
      <entry key="atom" value="application/atom+xml"/>
      <entry key="html" value="text/html"/>
      <entry key="json" value="application/json"/>
    </map>
  </property>
  <property name="viewResolvers">
    <list>
      <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
      <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
      </bean>
    </list>
  </property>
  <property name="defaultViews">
    <list>
      <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView" />
    </list>
  </property>
</bean>

保存 xml 文件时出现以下异常。

java.lang.ClassCastException java.lang.String cannot be cast to org.springframework.http.MediaType

<小时/>

dispatcher-servelet.xml文件的完整内容如下，如果有人需要查看。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"

       xmlns:context="http://www.springframework.org/schema/context"
       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/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">


    <context:component-scan base-package="controller" />
    <context:component-scan base-package="validatorbeans" />
    <mvc:annotation-driven />




<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
  <property name="mediaTypes">
    <map>
      <entry key="atom" value="application/atom+xml"/>
      <entry key="html" value="text/html"/>
      <entry key="json" value="application/json"/>
    </map>
  </property>
  <property name="viewResolvers">
    <list>
      <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
      <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
      </bean>
    </list>
  </property>
  <property name="defaultViews">
    <list>
      <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView" />
    </list>
  </property>
</bean>

    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
    <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="index.htm">indexController</prop>

            </props>
        </property>
    </bean>

<!--<bean id="viewResolver"
       class="org.springframework.web.servlet.view.InternalResourceViewResolver"
       p:prefix="/WEB-INF/jsp/"
       p:suffix=".jsp" />

       Initially this bean was mentioned like this was given a comment. It is specified as above-->

    <bean name="indexController"
          class="org.springframework.web.servlet.mvc.ParameterizableViewController"
          p:viewName="index" />
</beans>

如何解决这个异常？谷歌搜索results这个异常无法让我找到具体的引用。

<小时/>

编辑:

根据this配置中，我现在有以下 XML 映射。

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="order" value="1" />
    <property name="contentNegotiationManager">
        <bean class="org.springframework.web.accept.ContentNegotiationManager">
            <constructor-arg>
                <bean class="org.springframework.web.accept.PathExtensionContentNegotiationStrategy">
                    <constructor-arg>
                        <map>
                            <entry key="json" value="application/json"/>
                            <entry key="xml" value="application/xml"/>
                            <!--<entry key="html" value="text/html"/>
                            <entry key="atom" value="application/atom+xml"/-->
                        </map>
                    </constructor-arg>
                </bean>
            </constructor-arg>
        </bean>
    </property>


    <property name="defaultViews">
        <list>
            <!-- JSON View -->
            <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />

            <!-- XML View -->
            <bean class="org.springframework.web.servlet.view.xml.MarshallingView">
                <constructor-arg>
                    <bean class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
                        <property name="packagesToScan">
                            <list>
                                <value>documentLoader.domain</value>
                            </list>
                        </property>
                    </bean>
                </constructor-arg>
            </bean>
        </list>
    </property>
</bean>

<小时/>

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

并且ClassCastException消失了，但JSON仍然不起作用。我仍然遇到同样的错误，

Failed to load resource: the server responded with a status of 406 (Not Acceptable)

还剩下什么？有一个jira问题仍然可见。

注意:我有Jackson 1.9.8 (其下载 page )类路径上的库。对于 Jackson 2.1.1，它无法在运行时抛出以下异常。

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.view.ContentNegotiatingViewResolver#0' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Cannot create inner bean 'org.springframework.web.servlet.view.json.MappingJacksonJsonView#bb314f' of type [org.springframework.web.servlet.view.json.MappingJacksonJsonView] while setting bean property 'defaultViews' with key [0]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.view.json.MappingJacksonJsonView#bb314f' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.web.servlet.view.json.MappingJacksonJsonView]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/codehaus/jackson/map/ObjectMapper

因为 Jackson 2.1.1 在另一个包 - com.fasterxml.jackson.databind.ObjectMapper 中有类 ObjectMapper。有什么办法吗？

Answer 1

最好在 MediaType 类中引用常量

<constructor-arg>
    <map>
        <entry key="json">
            <util:constant static-field="org.springframework.http.MediaType.APPLICATION_JSON_VALUE" />
        </entry>
        <entry key="xml">
            <util:constant static-field="org.springframework.http.MediaType.APPLICATION_ATOM_XML_VALUE" />
        </entry>
    </map>
</constructor-arg>

您还需要包含 util 模式

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">