spring mvc json

问题背景：

    使用了springmvc+velocity的项目，返回json出现了问题

问题描述：

    出现了406错误

    

找不到要解析成的头部！

问题原因：

    缺少json转换配置

解决办法：

    在对应的servlet配置文件中添加

   

xmlns:mvc="http://www.springframework.org/schema/mvc" 

http://www.springframework.org/schema/mvc

           http://www.springframework.org/schema/mvc/spring-mvc.xsd"> 

<mvc:annotation-driven>

         <mvc:message-converters register-defaults="false">

            <bean class="org.springframework.http.converter.BufferedImageHttpMessageConverter"/>

            <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/>

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

            <bean class="org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter"/>

            <bean class="org.springframework.http.converter.xml.SourceHttpMessageConverter"/>

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

                <property name="supportedMediaTypes">

                    <list>

                        <value>text/html;charset=UTF-8</value>

                        <value>application/json;charset=UTF-8</value>

                        <value>application/*+json;charset=UTF-8</value>

                    </list>

                </property>

            </bean>

        </mvc:message-converters>

     </mvc:annotation-driven>  

来自为知笔记(Wiz)