no declaration can be found for element 'mvc:annotation-driven'

Question

I have the requirement of returning JSON/XML data from my controller.From what i found,I needed @ResponseBody in my method and for that I need <mvc:annotation-driven> enabled. I have tried all sorts of RnD but am still stuck! :(

Apparently my problem lies in my servlet.xml file (the schema isnt getting validated!) I am using Spring 3.1.1 & have explicitly put in spring-mvc-3.1.1.jar in my classpath.

Here's my servlet-context file sample-servlet.xml:

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"        xmlns:context="http://www.springframework.org/schema/context"        xmlns:mvc="http://www.springframework.org/schema/mvc"        xsi:schemaLocation="http://www.springframework.org/schema/tx                      http://www.springframework.org/schema/tx/spring-tx.xsd          http://www.springframework.org/schema/mvc-3.1  http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd          http://www.springframework.org/schema/beans    http://www.springframework.org/schema/beans/spring-beans.xsd          http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context.xsd">     <context:component-scan base-package="com.sample.controller"/>   <mvc:annotation-driven/>      <!--Use JAXB OXM marshaller to marshall/unmarshall following class-->   <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />    <bean id="xmlViewer"          class="org.springframework.web.servlet.view.xml.MarshallingView">     <constructor-arg>       <bean class="org.springframework.oxm.jaxb.Jaxb2Marshaller">         <property name="classesToBeBound">           <list>             <value>com.sample.model.SampleClass</value>           </list>         </property>       </bean>     </constructor-arg>   </bean>    <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">    <property name="viewResolvers">     <list>       <bean class="org.springframework.web.servlet.view.UrlBasedViewResolver">         <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>         <property name="prefix" value="/WEB-INF/jsp/"/>         <property name="suffix" value=".jsp"/>       </bean>     </list>   </property> </bean>  

My controller class looks like this :

@Controller public class XmlController {    @RequestMapping(value="/getXml",method = RequestMethod.POST)   public @ResponseBody AssociateDetail getXml(){     System.out.println("inside xml controller.....");     AssociateDetail assoBean=null;      try{       AssociateService add=new AssociateService();       assoBean=add.selectAssociateBean();     }catch(Exception e){       e.printStackTrace();     }      return assoBean;       } } 

Now the problem is <mvc:annotation-driven /> gives error:

cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'mvc:annotation-driven'.

And I have tried all the workarounds suggested on this site and beyond. Have updated my schema namespaces, using Spring 3.1.1 and @ResponseBody.

Answer 1

As the error suggests there's something wrong with the schema declaration. You do not have the xsd s declared. Use this instead.

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd                     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd                          http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd                     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">