（转）springmvc 文件下载上传典型代码

springmvc简单文件上传下载示例


//上传
 public static List<Map<String, Object>> upload(HttpServletRequest request,  
            String[] params, Map<String, Object[]> values) throws Exception {  
  
        List<Map<String, Object>> result = new ArrayList<Map<String, Object>>();  
  
        MultipartHttpServletRequest mRequest = (MultipartHttpServletRequest) request;  
        Map<String, MultipartFile> fileMap = mRequest.getFileMap();  
  
        String uploadDir = request.getSession().getServletContext()  
                .getRealPath("/")  
                + FileOperateUtil.UPLOADDIR;  
        File file = new File(uploadDir);  
  
        if (!file.exists()) {  
            file.mkdir();  
        }  
  
        String fileName = null;  
        int i = 0;  
        for (Iterator<Map.Entry<String, MultipartFile>> it = fileMap.entrySet()  
                .iterator(); it.hasNext(); i++) {  
  
            Map.Entry<String, MultipartFile> entry = it.next();  
            MultipartFile mFile = entry.getValue();  
  
            fileName = mFile.getOriginalFilename();  
  
            String storeName = rename(fileName);  
  
            String noZipName = uploadDir + storeName;  
            String zipName = zipName(noZipName);  
  
            // 上传成为压缩文件  
            ZipOutputStream outputStream = new ZipOutputStream(  
                    new BufferedOutputStream(new FileOutputStream(zipName)));  
            outputStream.putNextEntry(new ZipEntry(fileName));  
            outputStream.setEncoding("GBK");  
  
            FileCopyUtils.copy(mFile.getInputStream(), outputStream);  
  
            Map<String, Object> map = new HashMap<String, Object>();  
            // 固定参数值对  
            map.put(FileOperateUtil.REALNAME, zipName(fileName));  
            map.put(FileOperateUtil.STORENAME, zipName(storeName));  
            map.put(FileOperateUtil.SIZE, new File(zipName).length());  
            map.put(FileOperateUtil.SUFFIX, "zip");  
            map.put(FileOperateUtil.CONTENTTYPE, "application/octet-stream");  
            map.put(FileOperateUtil.CREATETIME, new Date());  
  
            // 自定义参数值对  
            for (String param : params) {  
                map.put(param, values.get(param)[i]);  
            }  
  
            result.add(map);  
        }  
        return result;  
    }  
  


//下载
 public static void download(HttpServletRequest request,  
            HttpServletResponse response, String storeName, String contentType,  
            String realName) throws Exception {  
        response.setContentType("text/html;charset=UTF-8");  
        request.setCharacterEncoding("UTF-8");  
        BufferedInputStream bis = null;  
        BufferedOutputStream bos = null;  
  
        String ctxPath = request.getSession().getServletContext()  
                .getRealPath("/")  
                + FileOperateUtil.UPLOADDIR;  
        String downLoadPath = ctxPath + storeName;  
  
        long fileLength = new File(downLoadPath).length();  
  
        response.setContentType(contentType);  
        response.setHeader("Content-disposition", "attachment; filename="  
                + new String(realName.getBytes("utf-8"), "ISO8859-1"));  
        response.setHeader("Content-Length", String.valueOf(fileLength));  
  
        bis = new BufferedInputStream(new FileInputStream(downLoadPath));  
        bos = new BufferedOutputStream(response.getOutputStream());  
        byte[] buff = new byte[2048];  
        int bytesRead;  
        while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {  
            bos.write(buff, 0, bytesRead);  
        }  
        bis.close();  
        bos.close();  
    }  
}