json转换器映射文件配置

//MappingJacksonHttpMessageConverter转换器，将对象转为json响应给浏览器 ：

<mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <!-- <constructor-arg ref="utf8Charset"/> -->
                 <!-- <property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" /> -->
                 <property name="writeAcceptCharset" value="false" /><!-- 用于避免响应头过大 --> 
                 <property name = "supportedMediaTypes">
                    <list>
                        <value>text/plain;charset=UTF-8</value>   
                        <value>text/html;charset=UTF-8</value>   
<!--                         <value>text/json;charset=UTF-8</value>    -->
                    </list>   
                 </property>
            </bean>
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                 <property name = "supportedMediaTypes">
                    <list>
                        <value>text/json;charset=UTF-8</value>   
                    </list>   
                 </property>
                
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>