Java 多部分文件到.zip

如何将多部分文件转换为.zip，然后再转换为字节？ 比如：

 MultipartFile file;
 ZipInputStream zip = new ZipInputStream(file.getInputStream());
 Base64.getEncoder().encode(zip)

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将

MultipartFile

转换为

.zip

文件并检索其字节：

public ResponseEntity handleFile(@RequestParam MultipartFile file) throws IOException 
{
    InputStream inputStream = file.getInputStream();
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    ZipOutputStream zipOutputStream = new ZipOutputStream(byteArrayOutputStream);
    ZipEntry zipEntry = new ZipEntry(file.getOriginalFilename());
    zipOutputStream.putNextEntry(zipEntry);

    byte[] bytes = new byte[1024];
    int length;
    while((length = inputStream.read(bytes)) >= 0) {
        zipOutputStream.write(bytes, 0, length);
    }
    zipOutputStream.close();

    // Do something with the byteArrayOutputStream
    System.out.println(byteArrayOutputStream.toString());

    return ResponseEntity.accepted().build();
}

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为了什么？您是接收文件并以这种方式存储，还是从磁盘读取文件并将其作为响应提供。我想以字节形式存储在数据库中。纠正问题你可能想看看这个