怎么自己做网站卖东西,哪些网站可以做招生,用户体验 网站 外国,上海市招投标公共信息服务平台业务背景#xff1a;
在开发过程中#xff0c;我们会遇到需要对文件#xff08;单个或多个#xff09;进行压缩并下载的功能需求#xff0c;这里记录一下压缩多个文件的实现过程#xff0c;或许有更好的方式请大家补充
前端实现一个按钮调下载压缩包的接口
button…业务背景
在开发过程中我们会遇到需要对文件单个或多个进行压缩并下载的功能需求这里记录一下压缩多个文件的实现过程或许有更好的方式请大家补充
前端实现一个按钮调下载压缩包的接口
button icondownload typeprimary clickdownload下载压缩包
buttonscriptdownload () {location.href faceConfig.basePath /download? fileIds paramData.fileIds //业务参数,根据实际情况写},
/script
后端接口实现
controller控制层定义下载压缩包接口 GetMapping(download)public void download(String fileIds){readService.download(fileIds,getResponse());}
定义service服务层接口
public interface ReadService {void download(String fileIds, HttpServletResponse response);
}
定义服务层接口实现类
Overridepublic void download(String fileIds, HttpServletResponse response) {String[] Ids fileIds.split(,);Map map new HashMap();Map bas64Map new HashMap();File[] file new File[Ids.length];File file1 null;OutputStream output null;BufferedOutputStream bufferedOutput null;FileInputStream inStream null;try {for (int i 0; i Ids.length; i) {// 1.获取到要压缩的文件这里是自己的业务逻辑可根据实际情况去写只要最后能拿到file就行Map paramMap new HashMap();paramMap.put(Id, Ids[i]);map certificatePrintReadMapper.getFileInfo(paramMap);bas64Map WaterMarkUtils.createStringMark(map);String base64 (String) bas64Map.get(qj);byte[] bytes decode(base64);file1 new File(Ids[i] 证书.jpg);output new FileOutputStream(file1);bufferedOutput new BufferedOutputStream(output);bufferedOutput.write(bytes);// 2。文件放到文件数组里file[i] file1;output.close();bufferedOutput.close();}// 3.创建压缩文件将文件数组进行压缩File zip new File(压缩包名字.zip);// 压缩文件zipFiles(file, zip);response.setContentType(*/*);response.addHeader(Content-Disposition, attachment;filename new String(压缩包名字.zip.getBytes(), ISO8859-1));ServletOutputStream outputStream response.getOutputStream();inStream new FileInputStream(zip);byte[] buf new byte[4096];int readLength;while (((readLength inStream.read(buf)) ! -1)) {outputStream.write(buf, 0, readLength);}inStream.close();outputStream.flush();outputStream.close();} catch (IOException e) {e.printStackTrace();} finally {if (bufferedOutput ! null) {try {bufferedOutput.close();} catch (IOException e) {e.printStackTrace();}}if (inStream ! null) {try {inStream.close();} catch (IOException e) {e.printStackTrace();}}}}//子方法压缩文件public static void zipFiles(File[] srcfile, File zipfile) {byte[] buf new byte[1024];FileInputStream in null;try {ZipOutputStream out new ZipOutputStream(new FileOutputStream(zipfile), StandardCharsets.UTF_8);//File file2 null;for (int i 0; i srcfile.length; i) {String filename srcfile[i].getName();in new FileInputStream(srcfile[i]);out.putNextEntry(new ZipEntry(filename));int len;while ((len in.read(buf)) 0) {out.write(buf, 0, len);}// out.setEncoding(GBK);out.closeEntry();in.close();System.out.println(srcfile[i].delete());}out.close();} catch (IOException e) {//e.printStackTrace();} finally {try {if (in ! null) {in.close();}} catch (IOException e) {//e.printStackTrace();}}}//子方法将Base64转成字节数组public static byte[] decode(String str) {byte[] b null;String result null;if (str ! null) {BASE64Decoder decoder new BASE64Decoder();try {b decoder.decodeBuffer(str);// result new String(b, utf-8);} catch (Exception e) {}}return b;}
这样就实现了一个将多个文件进行压缩并下载的功能啦
