Java OSS批量下载并压缩为ZIP代码实例

 /** * 批量下载为zip * @param req * @param response * @param keyList oss文件路径集合 * @param fileName 下载出来的zip文件名（一般以合同名命名） 如：测试合同,zip */ public static void downForZip(HttpServletRequest req, HttpServletResponse response, List keyList,String fileName ){ // 创建临时文件 File zipFile = null; try {<br>　　　　　　　　//临时文件名称 zipFile = File.createTempFile("test", ".zip"); FileOutputStream f = new FileOutputStream(zipFile); /** * 作用是为任何OutputStream产生校验和 * 第一个参数是制定产生校验和的输出流，第二个参数是指定Checksum的类型 （Adler32（较快）和CRC32两种） */ CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32()); // 用于将数据压缩成Zip文件格式 ZipOutputStream zos = new ZipOutputStream(csum); OSSClient ossClient= OSSUtil.getInstance(); for (String ossFile : keyList) { // 获取Object，返回结果为OSSObject对象 OSSObject ossObject = ossClient.getObject(OSSUtil.BUCKET, ossFile); // 读去Object内容 返回 InputStream inputStream = ossObject.getObjectContent(); // 对于每一个要被存放到压缩包的文件，都必须调用ZipOutputStream对象的putNextEntry()方法，确保压缩包里面文件不同名 String name=ossFile.substring(ossFile.lastIndexOf("/")+1); zos.putNextEntry(new ZipEntry(name)); int bytesRead = 0; // 向压缩文件中输出数据 while ((bytesRead = inputStream.read()) != -1) { zos.write(bytesRead); } inputStream.close(); zos.closeEntry(); // 当前文件写完，定位为写入下一条项目 } zos.close(); String header = req.getHeader("User-Agent").toUpperCase(); if (header.contains("MSIE") || header.contains("TRIDENT") || header.contains("EDGE")) { fileName = URLEncoder.encode(fileName, "utf-8"); //IE下载文件名空格变+号问题 fileName = fileName.replace("+", "%20"); } else { fileName = new String(fileName.getBytes(), "ISO8859-1"); } response.reset(); response.setContentType("text/plain"); response<strong style="color:transparent">来源gaodaima#com搞(代@码网</strong>.setContentType("application/octet-stream; charset=utf-8"); response.setHeader("Location", fileName); response.setHeader("Cache-Control", "max-age=0"); response.setHeader("Content-Disposition", "attachment; filename=" + fileName); FileInputStream fis = new FileInputStream(zipFile); BufferedInputStream buff = new BufferedInputStream(fis); BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream()); byte[] car = new byte[1024]; int l = 0; while (l <zipFile.length()) { int j = buff.read(car, 0, 1024); l += j; out.write(car, 0, j); } // 关闭流 fis.close(); buff.close(); out.close(); ossClient.shutdown(); // 删除临时文件 zipFile.delete(); } catch (IOException e1) { e1.printStackTrace(); }catch (Exception e) { e.printStackTrace(); } }