spring 4mvc下载文件的实现

From:http://skyfar666.iteye.com/blog/2304891

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">    
    <property name="messageConverters">    
        <list>    
        <!-- 下载用 -->  
            <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/>    
            <bean id="jsonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" >    
                <property name = "supportedMediaTypes">    
                    <list>    
                        <value>text/plain;charset=UTF-8</value>    
                    </list>    
                </property>    
            </bean>    
        </list>    
    </property>    
</bean>    

 

    @RequestMapping("downloadExcel")  
    public ResponseEntity<byte[]> downloadExcel(HttpServletRequest request)  
    {  
        String realPath = request.getServletContext().getRealPath("/");  
        String filepath = realPath + "/admin_files/ordertemplate.xls";  
        File file = new File(filepath);  
        HttpHeaders headers = new HttpHeaders();  
        String fileName = null;  
        try {  
            fileName = new String("订单模板文件.xls".getBytes("UTF-8"),  
                    "iso-8859-1");  
        } catch (UnsupportedEncodingException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }// 为了解决中文名称乱码问题  
        headers.setContentDispositionFormData("attachment", fileName);  
        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);  
        try {  
            return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),  
                    headers, HttpStatus.CREATED);  
        } catch (IOException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
            return null;  
        }  
    }