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使用RandomAccessFile和多线程时，如何拆分大字符文件？

[英]When using RandomAccessFile and Multi Thread, How do I split big char file?

原文 2017-04-10 07:59:09 1 1 java

I have to read a big char file.Then I have found RandomAccessFile which meets my need. 我必须读取一个大的char文件，然后找到满足我需要的RandomAccessFile 。 I have a try, then faced with a question that how to get the point that every thread starts with. 我尝试一下，然后遇到一个问题，即如何弄清楚每个线程的起点。

The RandomAccessFile API read file by byte, but the file is charset and I need to process every line.so How do I spilt it by line ? RandomAccessFile API按字节读取文件，但是该文件是字符集，我需要处理每一行。因此，如何按行将其溢出？

thanks help. 谢谢帮助。

Can not do this with NIO. NIO无法做到这一点。

1 个解决方案

I have to read a big char file. 我必须阅读一个大的char文件。

So you should be using FileReader , probably wrapped in a BufferedReader . 因此，您应该使用FileReader ，它可能包装在BufferedReader 。

However reading a file with multiple threads won't buy you anything. 但是，读取具有多个线程的文件不会为您带来任何好处。 The disk isn't multi-threaded. 磁盘不是多线程的。

And you can't read lines in parallel. 而且您不能并行读取行。 It doesn't even make sense, 甚至都没有道理

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