将CSV文件上传到ftp而不在本地创建物理文件 [英] Uploading a csv file to ftp without creating a physical file locally

问题描述

我想创建一个csv文件并将其发送到远程ftp服务器，我正在使用Apache Commons中的CSVWriter.

I want to create and send a csv file to a remote ftp server,i am using CSVWriter from Apache Commons.

目前，我正在创建一个本地临时文件，将该文件包装在Inputstream周围，然后使用client.store(<InputStream>,<Filename>)方法将此流上传到远程ftp服务器.这里的问题是它每次执行时都会创建一个本地临时文件.
我想摆脱这一点，并能够直接创建流，尤其是csv流.我的主要想法是避免创建本地临时文件.

At present, I am creating a local temp file, wrapping this file around an Inputstream, and then uploading this stream to remote ftp server using client.store(<InputStream>,<Filename>) method. The problem here is it is creating a local temp file every time it is executed.
I want to get rid of this and be able to create a stream, especially csv stream directly. My main idea is to avoid creating a local temp file.

推荐答案

您可以将ByteArrayOutputStream包装在任何类型的Writer中，并将该Writer用作CSVWriter的参数.这样，您可以提取一个字节数组，该字节数组可用作ByteArrayInputStream的参数.

You can wrap a ByteArrayOutputStream in any kind of Writer, and use that Writer as an argument for the CSVWriter. That way you can extract a byte array, which can be used as an argument for an ByteArrayInputStream.

如果数据量很大，则可以使用PipedInputStream和PipedOutputStream的组合来代替ByteArray * Streams.

If it's a large amount of data, you can use a combination of PipedInputStream and PipedOutputStream instead of the ByteArray*Streams.

这篇关于将CSV文件上传到ftp而不在本地创建物理文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！