Java - 制作字节数组作为下载

Question

我有一个作为字节数组 (byte[]) 的 zip 文件，我可以使用以下方法将它写入文件系统，

        FileOutputStream fos = new FileOutputStream("C:\\test1.zip");
        fos.write(decodedBytes);  // decodedBytes is the zip file as a byte array 
        fos.close();            

与其将其写入文件并读取它以作为下载，不如直接将字节数组作为下载，我试过了，

    response.setContentType("application/zip");
    response.setHeader("Content-Disposition", "attachment; filename=\"File.zip\"");
    ServletOutputStream outStream = response.getOutputStream();
    outStream.write(decodedBytes);  // decodedBytes is the zip file as a byte array 

这不起作用，我得到的是空文件。如何将字节数组作为下载？

更新:我添加了 finally 子句并关闭了 ServletOutputStream，它起作用了。

    }catch (Exception e) {
        Log.error(this, e);
    } finally {
        try{
            if (outStream != null) {
                outStream.close();              
            }
        } catch (IOException e) {
            Log.error(this, "Download: Error during closing resources");
        }
    }

Pankaj 解决方案也有效。

Answer 1

尝试以下操作:

ServletOutputStream outStream = response.getOutputStream();
response.setContentType("application/zip");
response.setHeader("Content-Disposition", "attachment; filename="DATA.ZIP"");
outStream.write(decodedBytes);
outStream.flush();