如何将字节数组转换为ZIP文件

  • Z时代
  • 2024-01-10
  • 分类：问答

我正在尝试将字节数组转换为ZIP文件。我使用以下代码获取字节：

byte[] originalContentBytes= new Verification().readBytesFromAFile(new File("E://file.zip"));
private byte[] readBytesFromAFile(File file) {
    int start = 0;
    int length = 1024;
    int offset = -1;
    byte[] buffer = new byte[length];
    try {
        //convert the file content into a byte array
        FileInputStream fileInuptStream = new FileInputStream(file);
        BufferedInputStream bufferedInputStream = new BufferedInputStream(
                fileInuptStream);
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        while ((offset = bufferedInputStream.read(buffer, start, length)) != -1) {
            byteArrayOutputStream.write(buffer, start, offset);
        }
        bufferedInputStream.close();
        byteArrayOutputStream.flush();
        buffer = byteArrayOutputStream.toByteArray();
        byteArrayOutputStream.close();
    } catch (FileNotFoundException fileNotFoundException) {
        fileNotFoundException.printStackTrace();
    } catch (IOException ioException) {
        ioException.printStackTrace();
    }
    return buffer;
}

但是我现在的问题是将字节数组转换回ZIP文件-如何完成？

回答：

要从字节中获取内容，可以使用

ZipInputStream zipStream = new ZipInputStream(new ByteArrayInputStream(bytes));
ZipEntry entry = null;
while ((entry = zipStream.getNextEntry()) != null) {
    String entryName = entry.getName();
    FileOutputStream out = new FileOutputStream(entryName);
    byte[] byteBuff = new byte[4096];
    int bytesRead = 0;
    while ((bytesRead = zipStream.read(byteBuff)) != -1)
    {
        out.write(byteBuff, 0, bytesRead);
    }
    out.close();
    zipStream.closeEntry();
}
zipStream.close();

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