<!-- 避免IE执行AJAX时,返回JSON出现下载文件
spring3为：org.springframework.http.converter.json.MappingJacksonHttpMessageConverter
spring4为：org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
 -->  
<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">  
  <property name="supportedMediaTypes">  
    <list>  
      <value>text/html;charset=UTF-8</value>  
    </list>  
  </property>  
</bean>  
 
<!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->  
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">  
  <property name="messageConverters">  
    <list>  
      <ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->  
    </list>  
  </property>  
</bean>  

<mvc:annotation-driven> 
  <mvc:message-converters register-defaults="true"> 
    <!-- 避免IE执行AJAX时,返回JSON出现下载文件 --> 
    <bean id="fastJsonHttpMessageConverter" class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter"> 
      <property name="supportedMediaTypes"> 
        <list> 
          <value>application/json;charset=UTF-8</value> 
        </list> 
      </property> 
    </bean> 
  </mvc:message-converters> 
</mvc:annotation-driven>