计算通过GZIPOutputStream形成的BufferedWriter写入文件的字节数 [英] Count the bytes written to file via BufferedWriter formed by GZIPOutputStream

问题描述

我有一个 BufferedWriter ，如下所示:

BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
        new GZIPOutputStream( hdfs.create(filepath, true ))));

String line = "text";
writer.write(line);

我想查找写入文件的字节，而无需查询文件

I want to find out the bytes written to the file with out querying file like

hdfs = FileSystem.get( new URI( "hdfs://localhost:8020" ), configuration );

filepath = new Path("path");
hdfs.getFileStatus(filepath).getLen();

因为这会增加开销，但我不希望这样.

as it will add overhead and I don't want that.

我也不能这样做:

line.getBytes().length;

压缩前给出的大小.

推荐答案

您可以使用

You can use the CountingOutputStream from Apache commons IO library.

将其放在GZIPOutputStream和文件Outputstream(hdfs.create(..))之间.

Place it between the GZIPOutputStream and the file Outputstream (hdfs.create(..)).

将内容写入文件后，您可以从CountingOutputStream实例读取写入的字节数.

After writing the content to the file you can read the number of written bytes from the CountingOutputStream instance.

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