springmvc 格式化返回日期格式

 <mvc:annotation-driven conversion-service="conversionService">
         <mvc:message-converters>
             <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                 <property name="objectMapper">
                     <bean class="com.fasterxml.jackson.databind.ObjectMapper">
                         <property name="dateFormat">
                             <bean class="java.text.SimpleDateFormat">
                                 <constructor-arg type="java.lang.String" value="yyyy-MM-dd" />
                             </bean>
                         </property>
                     </bean>
                 </property>
                 <property name="supportedMediaTypes">
                     <list>
                         <value>text/html;charset=UTF-8</value>
                         <value>application/json;charset=UTF-8</value>
                         <value>application/x-www-form-urlencoded</value>
                     </list>
                 </property>
             </bean>
         </mvc:message-converters>
     </mvc:annotation-driven>