@RequestMapping(value = "/configrole", method = RequestMethod.GET, produces = "text/html;charset=UTF-8") 
public @ResponseBody String configrole() { 
 ...... 
} 

public class StringHttpMessageConverter extends AbstractHttpMessageConverter<String> 
{ 
 public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8"); 
 .......... 
}

public MediaType(String type, String subtype, Charset charset) { 
  super(type, subtype, charset); 
} 

<bean id="stringHttpMessageConverter" 
  class="org.springframework.http.converter.StringHttpMessageConverter"> 
  <property name="supportedMediaTypes"> 
    <list> 
      <bean class="org.springframework.http.MediaType"> 
        <constructor-arg value="text" /> 
        <constructor-arg value="plain" /> 
        <constructor-arg value="UTF-8" /> 
      </bean> 
    </list> 
  </property> 
</bean> 

<mvc:annotation-driven>
<mvc:message-converters>
 <bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
 <value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>