spring mvc 同時輸出json和xml

方式一： 
參考：http://www.mkyong.com/spring-mvc/spring-3-mvc-and-xml-example/ 
滿足以下條件時會自動將對象轉換爲xml格式進行輸出： 

引用

As i know, when Spring see 

1. Object annotated with JAXB 
2. JAXB library existed in classpath 
3. “mvc:annotation-driven” is enabled 
4. Return method annotated with @ResponseBody 

It will handle the conversion automatically.

方式二（建議使用，可以和json等方式同時開啓）： 
    

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
          <property name="mediaTypes">
               <map>
                    <entry key="xml" value="application/xml"/>
                    <entry key="json" value="application/json"/>
               </map>
          </property>
          <property name="defaultViews">
               <list>
                    <bean class="org.springframework.web.servlet.view.xml.MarshallingView">
                         <property name="marshaller">
                              <bean class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
                                   <property name="classesToBeBound">
                                        <list>
                                             <value>cn.flysnowxf.resp.Result</value>
                                        </list>
                                   </property>
                              </bean>
                         </property>
                    </bean>
                    <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
               </list>
          </property>
     </bean>

當請求accept=application/xml或者url以.xml結尾，將選擇xml view進行處理，這裏配置的xml解析器是Jaxb2Marshaller。