springMVC系列之@Responsebody接口弹出f.txt下载问题

<mvc:annotation-driven>
		 <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                 <property name="supportedMediaTypes">  
		            <list>  
		                <value>text/json;charset=UTF-8</value>  
		                <value>text/html;charset=UTF-8</value>  
		                <value>application/json;charset=UTF-8</value>  
		            </list>  
		        </property>    
            </bean>
   		 </mvc:message-converters>
	</mvc:annotation-driven>

@RequestMapping("/updateHandInfo")
	@ResponseBody
	public ResultModel updateHandInfo(@RequestParam(value = "file", required = false) MultipartFile file,HttpServletRequest request,
			HandleDto handleDto)throws Exception{
		try {
			...
			return new ResultModel(true,"签收成功",resultMap);
		} catch (Exception e) {
			logger.error("签收失败",e);
			return new ResultModel(false,"签收失败",null);
		}
	}

@RequestMapping("/updateHandInfo")
	//@ResponseBody
	public void updateHandInfo(@RequestParam(value = "file", required = false) MultipartFile file,HttpServletRequest request,
			HandleDto handleDto,,HttpServletResponse response)throws Exception{
			String jsonStr = "";
		try {
			...
			jsonStr = JSONObject.toJSONString(new ResultModel(true,"签收成功",resultMap));
		} catch (Exception e) {
			logger.error("签收失败",e);
			jsonStr =  JSONObject.toJSONString(new ResultModel(false,"签收失败","0"));
		}
		// fix bug 直接通过response返回
		this.toJson(response, jsonStr);
	}

protected void toJson(HttpServletResponse response,String jsonString) throws IOException {
		response.setContentType("text/html;charset=UTF-8");
		response.getWriter().write(jsonString);
	}