spring mvc 同时输出json和xml

方式一： 
参考： http://www.mkyong.com/spring-mvc/spring-3-mvc-and-xml-example/  
满足以下条件时会自动将对象转换为xml格式进行输出： 

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（建议使用，可以和json等方式同时开启）： 
    

 <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.Resultvalue>
                                         list>
                                    property>
                               bean>
                          property>
                     bean>
                     <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
                list>
           property>
      bean>

当请求accept=application/xml或者url以.xml结尾，将选择xml view进行处理，这里配置的xml解析器是Jaxb2Marshaller。