找不到元素"MVC：注释驱动"的声明

Question

我需要从控制器返回JSON/XML数据。根据我的发现，我需要@ResponseBody在我的方法中，为此我需要启用<mvc:annotation-driven>。我已经尝试了各种各样的RnD，但仍然卡住了!(

显然我的问题在于我的servlet.xml文件(模式没有得到验证!)我正在使用Spring 3.1.1 &已经在我的类路径中明确地放入了spring-mvc-3.1. jar。

这是我的servlet上下文文件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> 

我的控制器类是这样的:

@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;    
  }
}

现在的问题是<mvc:annotation-driven />给出错误:

cvc-complex-type. 2.4.4 .c:匹配的通配符是严格的，但是没有为元素'mvc:annotation-driven'找到声明。

我已经尝试了这个网站和其他网站上建议的所有解决方法。已经更新了我的模式名称空间，使用Spring 3.1.1和@ResponseBody。

Answer 1

这个错误表明模式声明有问题。你没有申报xsd。

<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">

Answer 2

在顶部的schemaLocation声明中添加以下模式:

http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd