Springmvc文件下载

@RequestMapping(value = "/home/img/{imgname}/{imgtype}", method = RequestMethod.GET)
	public void getImge(@PathVariable String imgname, @PathVariable String imgtype,
			HttpServletRequest request, HttpServletResponse response){
		
        BufferedInputStream in = null;  
        OutputStream out = null;  
        try {     
            File file = new File("/home/img/" + imgname+ "." + imgtype);
            in = new BufferedInputStream(new FileInputStream(file));  
            out = new BufferedOutputStream(response.getOutputStream());  
            // 设置response内容的类型  
            response.setContentType(new MimetypesFileTypeMap().getContentType(file));
            //设置响应头和客户端保存文件名
            response.setHeader("Content-disposition", "attachment;filename=" + imgname + "." +imgtype);  
            byte[] buffer = new byte[10240];  
            int length = 0;  
            while ((length = in.read(buffer)) > 0) {
                out.write(buffer, 0, length); 
            }  
            out.flush();  
        } catch (IOException e) {
			throw SOAException.error("获取图片失败", e);
        } finally {  
            try {  
                if (in != null) {
                    in.close();  
                }  
                if (out != null) {
                    out.close();  
                }  
            } catch (IOException e) {
    			throw SOAException.error("文件流未成功关闭", e);
            }  
        }  
	}