手把手教你用SpringBoot将文件打包成zip存放或导出
环境准备
其实也没什么准备,准备好Springboot就行,还有几张图片:
将文件打包成Zip存放
代码
Controller代码:
@RequestMapping("/zip") @RestController public class ZipController { /** * 将文件打包成zip并存放在特定位置 */ @PostMapping("package") public void packageFileToZip() throws IOException { // 为了方便我直接将文件地址写好了,各位可以根据自己的情况修改 String[] filePath = new String[]{"E:\\ykds\\1068128498917799516.jpg", "E:\\ykds\\1068128498917917980.jpg", "E:\\ykds\\1068128498917807874.jpg"}; // 将需要打包的文件都放在一个集合中 List<File> fileList = new ArrayList<>(); for (String s : filePath) { File file = new File(s); fileList.add(file); } // 先在D盘创建一个压缩包 File zipFile = new File("D:\\package.zip"); if(!zipFile.exists()) zipFile.createNewFile(); // 将package.zip的File对象传到toZip对象中 ZipUtils.toZip(fileList, zipFile); } }
ZipUTils工具类代码
public class ZipUtils { /** * 把文件集合打成zip压缩包 * @param srcFiles 压缩文件集合 * @param zipFile zip文件名 * @throws RuntimeException 异常 */ public static void toZip(List<File> srcFiles, File zipFile) throws IOException { if(zipFile == null){ return; } if(!zipFile.getName().endsWith(".zip")){ return; } ZipOutputStream zos = null; FileOutputStream out = new FileOutputStream(zipFile); try { zos = new ZipOutputStream(out); for (File srcFile : srcFiles) { byte[] buf = new byte[BUFFER_SIZE]; zos.putNextEntry(new ZipEntry(srcFile.getName())); int len; // 读取文件并写入到zip中 FileInputStream in = new FileInputStream(srcFile); while ((len = in.read(buf)) != -1) { zos.write(buf, 0, len); zos.flush(); } in.close(); } } catch (Exception e) { e.printStackTrace(); }finally { if (zos != null) { zos.close(); } } } }
测试
代码打好了,接下来测试下,打开熟悉的postman:
调用接口后就会在D盘中新建一个package.zip的压缩包:
可以看到,我打包的文件都在这里,再看看能不能正常显示:
very good!
将文件打包成zip并导出
上面的方法只是将压缩包保存在本地,如果需要导出的话代码有点不一样。
代码
Controller代码:
/** * 将文件打包成zip并下载 */ @PostMapping("download") public void download(HttpServletResponse response) throws IOException { // 这里还是和上面一样 String[] filePath = new String[]{"E:\\ykds\\1068128498917799516.jpg", "E:\\ykds\\1068128498917917980.jpg", "E:\\ykds\\1068128498917807874.jpg"}; List<File> fileList = new ArrayList<>(); for (String s : filePath) { File file = new File(s); fileList.add(file); } response.setHeader("content-type", "application/octet-stream"); response.setContentType("application/octet-stream"); response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=download.zip"); ZipUtils.downloadZip(response.getOutputStream(), fileList); }
ZipUtils工具类代码
public static void downloadZip(OutputStream outputStream, List<File> fileList){ BufferedInputStream bufferedInputStream = null; ZipOutputStream zipOutputStream = null; try { zipOutputStream = new ZipOutputStream(outputStream); for (File file : fileList) { ZipEntry zipEntry = new ZipEntry(file.getName()); zipOutputStream.putNextEntry(zipEntry); byte[] buf = new byte[BUFFER_SIZE]; int len; FileInputStream in = new FileInputStream(file); while ((len = in.read(buf)) != -1) { zipOutputStream.write(buf, 0, len); zipOutputStream.flush(); } } zipOutputStream.flush(); zipOutputStream.close(); } catch (IOException e) { e.printStackTrace(); } finally { // 关闭流 try { if (bufferedInputStream != null) { bufferedInputStream.close(); } if (zipOutputStream != null ) { zipOutputStream.close(); } if (outputStream != null) { outputStream.close(); } } catch (IOException e) { e.printStackTrace(); } } }
测试
还是用postman:
下载完成后打开看看
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