在 Mac 上下载后生成的 zip 文件总是损坏

Question

假设我有一个对象集合，我想用 zip 包装它们。我的 zip 转换 class 看起来像：

public class ZipFile {

    public byte[] createZipByteArray(String fileName, byte[] content) throws IOException {
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        try (byteArrayOutputStream; ZipOutputStream zipOutputStream = new ZipOutputStream(byteArrayOutputStream)) {
            zipOutputStream.setLevel(Deflater.NO_COMPRESSION);
            ZipEntry zipEntry = new ZipEntry(fileName);
            zipOutputStream.putNextEntry(zipEntry);
            zipOutputStream.write(content);
            zipOutputStream.closeEntry();
            zipOutputStream.flush();
        }
        return byteArrayOutputStream.toByteArray();
    }

}

我的 controller 看起来像：

    @GetMapping(value = "objectWithDetails/zip", produces = "application/zip")
    @RolesAllowed("QUERY_DATA")
    public ResponseEntity<byte[]> getObjectWithDetails(String limit, HttpServletResponse response) throws IOException {
        response.setContentType("application/zip");

        List<ObjectSpecification> objectRepresentation = recipeService.getObjectRepresentation(limit);

        byte[] objectsBytes = objectMapper.writeValueAsBytes(objectRepresentation);

        ZipFile zipFile = new ZipFile();

        return ResponseEntity
                .ok()
                .contentType(MediaType.valueOf("application/zip"))
                .header("Content-Encoding", "UTF-8")
                .header("Content-Disposition", String.format("attachment; filename=\"details_%s.zip\"", dateTimeProvider.nowDate()))
                .body(zipFile.createZipByteArray(String.format("details_%s.zip", dateTimeProvider.nowDate()), objectsBytes));

    }

在 swagger 中，我有生成的 zip 文件的下载选项。 毕竟，当我尝试打开下载的文件时，我收到以下信息：

Unable to expand filename.zip. It is in an unsupported format.

我尝试在不同的配置中关闭ZipOutputStream和ByteArrayOutputStream 。 为 controller 中的内容类型应用了不同的选项，但我仍然无法找出为什么所有 zip 文件都已损坏。 对于我想念的内容，我将不胜感激。 干杯!

Answer 1

我设法通过 @k314159 找到了根本原因，即我有一个 zip 文件被 zip 文件包裹。 新版本按预期工作。

    public static byte[] createZipByteArray(String fileName, byte[] content) throws IOException {
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        try (byteArrayOutputStream; ZipOutputStream zipOutputStream = new ZipOutputStream(byteArrayOutputStream)) {
            zipOutputStream.setLevel(Deflater.DEFLATED);
            ZipEntry zipEntry = new ZipEntry(fileName);
            zipOutputStream.putNextEntry(zipEntry);
            zipOutputStream.write(content);
            zipOutputStream.closeEntry();
            zipOutputStream.flush();
        }
        return byteArrayOutputStream.toByteArray();
    }

和 controller

    @GetMapping(value = "objectWithDetails", produces = "application/zip")
    @RolesAllowed("QUERY_DATA")
    public ResponseEntity<byte[]> getObjectWithDetails(String limit, HttpServletResponse response) throws IOException {
        response.setContentType("application/zip");
        List<ObjectSpecification > objectRepresentation = objectService.getObjectRepresentation(limit);

        byte[] objectsBytes = objectMapper.writeValueAsBytes(objectRepresentation);

        return ResponseEntity
                .ok()
                .contentType(MediaType.valueOf("application/zip"))
                .header("Content-Encoding", "UTF-8")
                .header("Content-Disposition", getObjectFileName("attachment; filename=objects_"))
                .body(createZipByteArray(getObjectFileName("objects_"), objectsBytes));
    }