文件保存项目路径下和下载项目中的excel文档

文件保存项目路径下

@ResponseBody
	@RequestMapping(value = "/uploadEx")
	public Result upload(HttpServletRequest request, @RequestParam(value = "file", required = false) MultipartFile file)
			throws IOException {
    	Result r = new Result();
    	r.setMessage("添加成功");
    	r.setStatusCode(0);
    	r.setSuccess(true);
		System.out.println("执行upload");
		request.setCharacterEncoding("UTF-8");
		System.out.println("执行文件上传");
		String msgId = request.getParameter("msgboardId");
		System.out.println("msgId:" + msgId);
		if (!file.isEmpty()) {
			System.out.println("成功获取文件");
			String fileName = file.getOriginalFilename();
			String path = null;
			String type = null;
			type = fileName.indexOf(".") != -1 ? fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length())
					: null;
			System.out.println("文件初始名称为：" + fileName + " 类型为：" + type);
			if (type != null) {
//				if ("GIF".equals(type.toUpperCase()) || "PNG".equals(type.toUpperCase())
//						|| "JPG".equals(type.toUpperCase())) {
					// 项目在容器中实际发布运行的根路径
			String realPath = request.getSession().getServletContext().getRealPath("/");
	    	System.out.println(realPath);
			String path_del = realPath;
//					request.getSession().getServletContext().getRealPath("/");
			// 自定义的文件名称
			String trueFileName = String.valueOf(System.currentTimeMillis()) + fileName;
			// 设置存放图片文件的路径
			path = realPath + "/uploadEx/" + trueFileName;
			System.out.println("存放文件的路径:" + path);
			file.transferTo(new File(path));
			System.out.println("文件成功上传到指定目录下");
			
			String newPath = "../uploadEx/" + trueFileName;
			return r;
//				} else {
					System.out.println("不是我们想要的文件类型,请按要求重新上传");
					return "error";
//					r.setMessage("不是我们想要的文件类型,请按要求重新上传");
//		        	r.setStatusCode(1);
//		        	r.setSuccess(false);
//		        	return r;
//				}
			} else {
//				System.out.println("文件类型为空");
//				return "error";
				r.setMessage("文件类型为空");
	        	r.setStatusCode(1);
	        	r.setSuccess(false);
	        	return r;
			}
		} else {
//			System.out.println("没有找到相对应的文件");
//			return "error";
			r.setMessage("没有找到相对应的文件");
        	r.setStatusCode(1);
        	r.setSuccess(false);
        	return r;
		}
	}

下载项目中的excel文件

@RequestMapping(value = "/excelOut")
    public void excelStandardTemplateOut(HttpServletRequest request,
           HttpServletResponse response) throws IOException{
        URL save = Thread.currentThread().getContextClassLoader().getResource("");
        String str = save.toString();
        str=str.substring(5,str.length());
        str=str.replaceAll("%20", " ");  
        int num = str.lastIndexOf("wsaicsl");//wgbs 为项目名，应用到不同的项目中，这个需要修改！
        str=str.substring(0, num+"wsaicsl".length());
        str = str +"/demo/synonyms_template.xlsx";//Excel模板所在的路径。
        File f = new File(str);
         // 设置response参数，可以打开下载页面
       response.reset();
       response.setContentType("application/vnd.ms-excel;charset=utf-8");
       try {
           response.setHeader("Content-Disposition", "attachment;filename="+ new String(("synonyms_template" + ".xlsx").getBytes(), "iso-8859-1"));//下载文件的名称
       } catch (UnsupportedEncodingException e) {
           e.printStackTrace();
       }
       ServletOutputStream out = response.getOutputStream();
       BufferedInputStream bis = null;
       BufferedOutputStream bos = null;
       try {
           bis = new BufferedInputStream(new FileInputStream(f));
           bos = new BufferedOutputStream(out);
           byte[] buff = new byte[2048];
           int bytesRead;
           while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
               bos.write(buff, 0, bytesRead);
           }
       } catch (final IOException e) {
           throw e;
       } finally {
           if (bis != null)
               bis.close();
           if (bos != null)
               bos.close();
       }
}