/** * 下载脚本文件 * @date 2018/5/16 17:26 * @since JDK 1.8 * @author NetSnake * @verison: 1.0 */ @Override public void fileDownload(ScriptQueryRequest reqMsg, User user,HttpServletResponse response) { //参数验证 ValidationUtils.checkNotEmpty(reqMsg.getScript_id(), "脚本id不能为空"); //查询脚本信息 CapabilityScriptDO scriptDO = iCapabilityScriptDao.getScriptById(reqMsg.getScript_id()); ValidationUtils.checkNotEmpty(scriptDO, "脚本信息不存在"); //查询脚本下是否有文件 CapabilityScriptFileDO scriptFileDO = new CapabilityScriptFileDO(); scriptFileDO.setScript_id(reqMsg.getScript_id()); scriptFileDO.setDelete_flag(TestCapabilityDictionary.DELETE_FLAG); List<CapabilityScriptFileDO> scriptFileDOList = iCapabilityScriptDao.queryFilesList(scriptFileDO); ValidationUtils.checkNotEmpty(scriptFileDOList, "脚本下不存在文件"); try { //压缩文件 List<File> files = new ArrayList<>(); for (CapabilityScriptFileDO vo : scriptFileDOList) { //读取服务器文件 String str = vo.getFile_path().replace(downBaseUrl,uploadBaseRealPath); System.out.print(str+"=="+vo.getFile_path()); File file = new File(str); files.add(file); } String fileName = scriptDO.getScript_name() + ".zip"; //在服务器端创建打包下载的临时文件 String globalUploadPath = uploadBaseRealPath; String outFilePath = globalUploadPath + File.separator + fileName; File file = new File(outFilePath); //文件输出流 FileOutputStream outStream = new FileOutputStream(file); //压缩流 ZipOutputStream toClient = new ZipOutputStream(outStream); //设置压缩文件内的字符编码,不然会变成乱码 this.zipFile(files, toClient); toClient.close(); outStream.close(); this.downloadZip(file, response); } catch (Exception e) { throw new BusinessException(String.valueOf(ServiceStatusCodeConstant.BUSINESS_EXCEPTION), "下载脚本文件失败!!"); } } /** * 压缩文件列表中的文件 * @date 2018/5/17 9:38 * @since JDK 1.8 * @author NetSnake * @verison: 1.0 */ public static void zipFile(List files, ZipOutputStream outputStream) { try { int size = files.size(); //压缩列表中的文件 for (int i = 0; i < size; i++) { File file = (File) files.get(i); try { zipFile(file, outputStream); } catch (Exception e) { continue; } } } catch (Exception e) { throw new BusinessException(String.valueOf(ServiceStatusCodeConstant.BUSINESS_EXCEPTION), "压缩文件列表中的文件失败!!"); } } /** * 将文件写入到zip文件中 * @date 2018/5/17 9:38 * @since JDK 1.8 * @author NetSnake * @verison: 1.0 */ public static void zipFile(File inputFile, ZipOutputStream outputstream) throws IOException, ServletException { try { if (inputFile.exists()) { if (inputFile.isFile()) { FileInputStream inStream = new FileInputStream(inputFile); BufferedInputStream bInStream = new BufferedInputStream(inStream); ZipEntry entry = new ZipEntry(inputFile.getName()); outputstream.putNextEntry(entry); final int MAX_BYTE = 10 * 1024 * 1024; //最大的流为10M long streamTotal = 0; //接受流的容量 int streamNum = 0; //流需要分开的数量 int leaveByte = 0; //文件剩下的字符数 byte[] inOutbyte; //byte数组接受文件的数据 streamTotal = bInStream.available(); //通过available方法取得流的最大字符数 streamNum = (int) Math.floor(streamTotal / MAX_BYTE); //取得流文件需要分开的数量 leaveByte = (int) streamTotal % MAX_BYTE; //分开文件之后,剩余的数量 if (streamNum > 0) { for (int j = 0; j < streamNum; ++j) { inOutbyte = new byte[MAX_BYTE]; //读入流,保存在byte数组 bInStream.read(inOutbyte, 0, MAX_BYTE); outputstream.write(inOutbyte, 0, MAX_BYTE); //写出流 } } //写出剩下的流数据 inOutbyte = new byte[leaveByte]; bInStream.read(inOutbyte, 0, leaveByte); outputstream.write(inOutbyte); outputstream.closeEntry(); //Closes the current ZIP entry and positions the stream for writing the next entry bInStream.close(); //关闭 inStream.close(); } } else { throw new BusinessException(String.valueOf(ServiceStatusCodeConstant.BUSINESS_EXCEPTION), "zip文件不存在!!"); } } catch (IOException e) { throw new BusinessException(String.valueOf(ServiceStatusCodeConstant.BUSINESS_EXCEPTION), "将文件写入到zip文件中失败!!"); } } /** * 下载打包的文件 * @date 2018/5/17 9:39 * @since JDK 1.8 * @author NetSnake * @verison: 1.0 */ public static void downloadZip(File file, HttpServletResponse response) { try { // 以流的形式下载文件。 BufferedInputStream fis = new BufferedInputStream(new FileInputStream(file.getPath())); byte[] buffer = new byte[fis.available()]; fis.read(buffer); fis.close(); // 清空response response.reset(); OutputStream toClient = new BufferedOutputStream(response.getOutputStream()); response.setContentType("application/octet-stream"); response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(file.getName(), "UTF-8")); toClient.write(buffer); toClient.flush(); toClient.close(); file.delete(); //将生成的服务器端文件删除 } catch (IOException ex) { throw new BusinessException(String.valueOf(ServiceStatusCodeConstant.BUSINESS_EXCEPTION), "下载打包的文件失败!!"); } }
java多文件压缩包zip文件下载
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