springMVC的配置，请大神们看看，有没有哪里有问题，我用Model做返回类型的时候总是映射到URL

项目结构

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">  <display-name>xnb_web_api</display-name>      <context-param> <param-name>webAppRootKey</param-name> <param-value> xnb_web_api.root </param-value>   </context-param>     <welcome-file-list>     <welcome-file>/index.jsp</welcome-file>  </welcome-file-list> <!--********************************** log4j配置       ********************************** -->   <context-param>    <param-name>log4jConfigLocation</param-name>    <param-value>classpath:config/log4j.properties</param-value>  </context-param>    <context-param>    <param-name>log4jRefreshInterval</param-name>    <param-value>6000</param-value>  </context-param>    <listener>      <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>  </listener><!--********************************** log4j配置   ********************************** -->      <!--********************************** spring配置   ********************************** -->     <context-param>    <param-name>contextConfigLocation</param-name>    <param-value>classpath:config/springConfig/*.xml</param-value>  </context-param>  <listener>    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  </listener>    <servlet>    <servlet-name>xnb_web_api</servlet-name>    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>    <init-param>      <param-name>contextConfigLocation</param-name>      <param-value>classpath:config/project-servlet.xml</param-value>    </init-param>    <init-param>      <param-name>encoding</param-name>      <param-value>UTF-8</param-value>    </init-param>    <load-on-startup>1</load-on-startup>  </servlet>  <servlet-mapping>    <servlet-name>xnb_web_api</servlet-name>    <url-pattern>/</url-pattern>  </servlet-mapping><!--********************************** spring配置   ********************************** --> <!-- **********************************  字符集过滤     ********************************************************* -->  <filter>    <filter-name>Set Character Encoding</filter-name>    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>    <init-param>      <param-name>encoding</param-name>      <param-value>UTF-8</param-value>    </init-param>    <init-param>  <param-name>forceEncoding</param-name>  <param-value>true</param-value></init-param>  </filter>  <filter-mapping>    <filter-name>Set Character Encoding</filter-name>    <url-pattern>/*</url-pattern>  </filter-mapping><!-- **********************************  字符集过滤     ********************************************************* --> <!-- **********************************过滤器配置 **********************************-->  <filter>  <filter-name>loginCheck</filter-name>  <filter-class>com.moensun.xnbwebapi.filter.SessionCheck</filter-class>  </filter>  <filter-mapping>  <filter-name>loginCheck</filter-name>  <url-pattern>/*</url-pattern>  </filter-mapping>   <!-- **********************************过滤器配置 **********************************--></web-app>

project-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:p="http://www.springframework.org/schema/p"         xmlns:context="http://www.springframework.org/schema/context"         xmlns:mvc="http://www.springframework.org/schema/mvc"     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">  <context:annotation-config />   <mvc:annotation-driven /><!-- ************************  把标记了@Controller注解的类转换为bean ************************ -->       <context:component-scan base-package="com.moensun.xnbwebapi.controller">             </context:component-scan>  <!-- ************************  把标记了@Controller注解的类转换为bean ************************ -->             <mvc:resources mapping="/resources/**" location="/resources/"/> <!-- 静态文件 -->  <!--*****************************************    中文乱码解决 以UTF8输出              *****************************************--><bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">    <property name="messageConverters">        <list>            <ref bean="jsonHttpMessageConverter" />            <ref bean="stringHttpMessageConverter" />         </list>    </property></bean><!-- json -->    <bean id="jsonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"><property name="supportedMediaTypes" value="application/json" /><property name="objectMapper" ref="jacksonObjectMapper" /></bean>  <bean id="jacksonObjectMapper" class="com.fasterxml.jackson.databind.ObjectMapper" /><bean id="jacksonSerializationConfig" class="com.fasterxml.jackson.databind.SerializationConfig" factory-bean="jacksonObjectMapper" factory-method="getSerializationConfig" /><!-- json --><!-- string --><bean id="stringHttpMessageConverter" class="org.springframework.http.converter.StringHttpMessageConverter"><property name="supportedMediaTypes">  <list>        <value>text/plain;charset=UTF-8</value>        <value>text/html;charset=UTF-8</value>        <value>application/json;charset=UTF-8</value>  </list>  </property>  </bean><!-- string --><!--*****************************************    中文乱码解决 以UTF8输出              *****************************************-->      <!-- *****************************   配置视图解释器    ***************************** --> <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">  <property name="mediaTypes">    <map>      <entry key="html" value="text/html"/>      <entry key="xml" value="text/xml"/>    <entry key="json" value="application/json"/>    </map>  </property><property name="defaultViews">    <list>        <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView" />   </list>    </property><property name="viewResolvers">    <list>    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />      <property name="prefix" value="/WEB-INF/views/"/>      <property name="suffix" value=".jsp"/>    </bean>  </list></property></bean><!-- *****************************   配置视图解释器    ***************************** -->             </beans>       

applicationContext.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:mvc="http://www.springframework.org/schema/mvc"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:mongo="http://www.springframework.org/schema/data/mongo" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd                    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-34.0.xsd                         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd                    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd                    http://www.springframework.org/schema/aop  http://www.springframework.org/schema/aop/spring-aop.xsd                   http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd">  <mvc:annotation-driven/>      <context:component-scan base-package="com.moensun.xnbwebapi"></context:component-scan>  <!--********************************************************    载入外部文件       ******************************************************** -->  <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" />  <property name="ignoreResourceNotFound" value="true" />  <property name="ignoreUnresolvablePlaceholders" value="true" /><property name="locations"><list><value>classpath:config/dbConfig/db.properties</value></list></property> </bean><!--********************************************************    载入外部文件       ******************************************************** -->                        </beans>                    

配置如上 ，代码如下

@Controller@RequestMapping(value="user/")public class UserController {@RequestMapping(value="login")public @ResponseBody  Model login(final Model model){model.addAttribute("1","2");return model;}}

用Model这种返回方式，总是映射到URL上，我不知道哪里出了问题，同事是可以返回JSON的。有哪位大神遇到请帮我看下。