spring+mybatis 通过@ResponseBody返回结果中文乱码的解决方法

@ResponseBody
@RequestMapping(value ="/selectByFormId",method = RequestMethod.GET)
public Map<String,Object> getClassName(String formId){
  List<String> list =formInfoService.selectClassName(formId);
  Map<String,Object> map = new HashMap<String,Object>();
  map.put("data",list);
  map.put("status",true);
  return map;
}

{"data":["璧璁璐�","淇绫�","绠＄绫�","�","ㄨ绫�","璧浜х�","璧璁＄�","宸绠＄绫�",<br>"璐�","浜轰ょ�","璐㈠＄�","瀹㈡风�","瑙绫�","瀹㈣绫�","浜轰娲诲ㄧ�","浜轰琛跨�","绫�",<br>"璇锋绫�","绠＄被","ヨ涓＄�"],"status":true}

<!-- 解决ResponseBody 乱码问题StringHttpMessageConverter这个转换器转换时，父类AbstractHttpMessageConverter的supportedMediaTypes属性默认是iso-8895-1导致 -->           
  <mvc:annotation-driven> 
    <mvc:message-converters> 
      <bean class="org.springframework.http.converter.StringHttpMessageConverter"> 
        <property name="supportedMediaTypes" value="text/html;charset=utf-8"></property> 
      </bean> 
    </mvc:message-converters> 
  </mvc:annotation-driven> 

error：...cvc-complex-type.2.1: 元素 'mvc:annotation-driven' 必须不含字符或元素信息项 [子级],因为该类型的内容类型为空。

<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-3.1.xsd  
            http://www.springframework.org/schema/context  
            http://www.springframework.org/schema/context/spring-context-3.1.xsd  
            http://www.springframework.org/schema/mvc  
            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

{"data":["资讯请购类","促销类","管理类","暂支类","储运类","资产类","资讯服务类","差旅管理类","采购类","人事考勤类"<br>,"财务类","客户类","视拓类","客诉类","人事活动类","人事行政类","公文类","请款类","销管类","营运业务类"],"status":true}

StringHttpMessageConverter 这个方法 有很多转换作用，有时间可以多看看