zip导出demo
/** * 导出文件 * * @param response * @throws Exception */ public void exportQytzpz(HttpServletRequest request, UserData userData, HttpServletResponse response, String year, String month) throws Exception { month = month.startsWith("0") ? month.replace("0", "") : month; SqlParamDTO sqlParamDTO = qytzshDAO.makeQytzpzParamDTO(userData, year, month); String fileName = "历史台账信息"; Connection conn = null; PreparedStatement pstm = null; ResultSet rs = null; try { //查台账 conn = CommonDAO.getConnection(); pstm = conn.prepareStatement(sqlParamDTO.getSql()); sqlParamDTO.setParameterValues(pstm); rs = pstm.executeQuery(); String title = year + "年" + month + "月工价台账凭证"; String rootPath = ""; if (StringUtils.isNotEmpty(SystemParameter.OUTER_SHAREFILE_PATH)) { rootPath = SystemParameter.OUTER_SHAREFILE_PATH; } else { rootPath = request.getRealPath(CommonConstant.EXPORT_DATA_FILE_PATH); } rootPath = rootPath + File.separator + "ScTzUploadPics" + File.separator; String source = rootPath + File.separator + title; //创建图片文件目录 createpicDir(rootPath, rs, title); //打包zip,导出 ServletOutputStream out = response.getOutputStream(); //将zip以流的形式输出到前台 response.setHeader("content-type", "application/octet-stream"); response.setCharacterEncoding("utf-8"); // 设置浏览器响应头对应的Content-disposition //参数中 testZip 为压缩包文件名,尾部的.zip 为文件后缀 response.setHeader("Content-disposition", "attachment;filename=" + new String(title.getBytes("gbk"), "iso8859-1") + ".zip"); toZip(source, out, true); //删除过度文件 deleteDir(source); } catch (ThtfException e) { e.printStackTrace(); } finally { if (rs != null) { rs.close(); } } } /** * 删除过度文件夹 * * @param path * @return */ private boolean deleteDir(String path) { File file = new File(path); if (!file.exists()) { return false; } if (file.isFile()) { return file.delete(); } File[] files = file.listFiles(); for (File f : files) { if (f.isFile()) { if (!f.delete()) { return false; } } else { if (!this.deleteDir(f.getAbsolutePath())) { return false; } } } return file.delete(); } /** * 压缩成ZIP 方法 * * @param srcDir 压缩文件夹路径 * @param out 输出流 * @param KeepDirStructure 是否保留原来的目录结构,true:保留目录结构; * false:所有文件跑到压缩包根目录下(注意:不保留目录结构可能会出现同名文件,会压缩失败) * @throws RuntimeException 压缩失败会抛出运行时异常 */ private void toZip(String srcDir, OutputStream out, boolean KeepDirStructure) throws RuntimeException { long start = System.currentTimeMillis(); ZipOutputStream zos = null; try { zos = new ZipOutputStream(out); File sourceFile = new File(srcDir); compress(sourceFile, zos, sourceFile.getName(), KeepDirStructure); long end = System.currentTimeMillis(); } catch (Exception e) { throw new RuntimeException("zip error from ZipUtils", e); } finally { if (zos != null) { try { zos.close(); } catch (IOException e) { e.printStackTrace(); } } } } /** * 递归压缩方法 * * @param sourceFile 源文件 * @param zos zip输出流 * @param name 压缩后的名称 * @param KeepDirStructure 是否保留原来的目录结构,true:保留目录结构; * false:所有文件跑到压缩包根目录下(注意:不保留目录结构可能会出现同名文件,会压缩失败) * @throws Exception */ private void compress(File sourceFile, ZipOutputStream zos, String name, boolean KeepDirStructure) throws Exception { byte[] buf = new byte[1024]; if (sourceFile.isFile()) { // 向zip输出流中添加一个zip实体,构造器中name为zip实体的文件的名字 zos.putNextEntry(new ZipEntry(name)); // copy文件到zip输出流中 int len; FileInputStream in = new FileInputStream(sourceFile); while ((len = in.read(buf)) != -1) { zos.write(buf, 0, len); } // Complete the entry zos.closeEntry(); in.close(); } else { File[] listFiles = sourceFile.listFiles(); if (listFiles == null || listFiles.length == 0) { // 需要保留原来的文件结构时,需要对空文件夹进行处理 if (KeepDirStructure) { // 空文件夹的处理 zos.putNextEntry(new ZipEntry(name + "/")); // 没有文件,不需要文件的copy zos.closeEntry(); } } else { for (File file : listFiles) { // 判断是否需要保留原来的文件结构 if (KeepDirStructure) { // 注意:file.getName()前面需要带上父文件夹的名字加一斜杠, // 不然最后压缩包中就不能保留原来的文件结构,即:所有文件都跑到压缩包根目录下了 compress(file, zos, name + "/" + file.getName(), KeepDirStructure); } else { compress(file, zos, file.getName(), KeepDirStructure); } } } } }
private void createpicDir(String rootPath, ResultSet rs, String title) throws SQLException, IOException { FileInputStream fis = null; FileOutputStream fos = null; BufferedInputStream bis = null; BufferedOutputStream bos = null; try { while (rs.next()) { QytzDTO qytzDTO = getQytzDTO(rs); String price5pic = qytzDTO.getPrice5pic(); String price20pic = qytzDTO.getPrice20pic(); String qymc = qytzDTO.getQymc(); String ggpmc = qytzDTO.getGgpmc(); String ggplx = qytzDTO.getGgplx(); ggplx = ggplx == "1" ? "购进" : "出厂"; //5日 if (StringUtils.isNotEmpty(price5pic)) { String[] pics = price5pic.split(","); for (int i = 0; i < pics.length; i++) { String[] suffixs = pics[i].split("\\."); String inPath = rootPath + File.separator + pics[i]; String outPath = rootPath + File.separator + title + File.separator + qymc + File.separator + ggplx + "-" + ggpmc + "-5日" + "(" + (i + 1) + ")." + suffixs[1]; File inFile = new File(inPath); File outFile = new File(outPath); if (!inFile.exists()) { continue; } fis = new FileInputStream(inFile); bis = new BufferedInputStream(fis); //检查父目录 if (!outFile.exists()) { outFile.mkdirs(); outFile.delete(); } fos = new FileOutputStream(outFile); bos = new BufferedOutputStream(fos); int len; byte[] buffer = new byte[2048]; while ((len = bis.read(buffer)) != -1) { bos.write(buffer, 0, len); } fos.flush(); bos.flush(); } } //20日 if (StringUtils.isNotEmpty(price20pic)) { String[] pics = price20pic.split(","); for (int i = 0; i < pics.length; i++) { String[] suffixs = pics[i].split("\\."); String inPath = rootPath + File.separator + pics[i]; String outPath = rootPath + File.separator + title + File.separator + qymc + File.separator + ggplx + "-" + ggpmc + "-20日" + "(" + (i + 1) + ")." + suffixs[1]; File inFile = new File(inPath); File outFile = new File(outPath); if (!inFile.exists()) { continue; } fis = new FileInputStream(inFile); bis = new BufferedInputStream(fis); //检查父目录 if (!outFile.exists()) { outFile.mkdirs(); outFile.delete(); } fos = new FileOutputStream(outFile); bos = new BufferedOutputStream(fos); int len; byte[] buffer = new byte[2048]; while ((len = bis.read(buffer)) != -1) { bos.write(buffer, 0, len); } bos.flush(); } } } } catch (IOException e) { e.printStackTrace(); } finally { if (bis != null) { bis.close(); } if (bos != null) { bos.close(); } if (fis != null) { fis.close(); } if (fos != null) { fos.close(); } System.gc(); } }